GeoPT14 - OshBO, Alkaline Granite

Transcription

1 GeoPT - OshBO, Alkaline Granite Veranstalter: International Association of Geoanalysts and Geostandards Newsletter - GeoPT Ringversuchsmaterial: OshBO, Alkaline Granite RV geschlossen: 0 Literatur: Proficiency Testing Report GeoPT (Laborcode CRB = O0) Hauptelemente [MA%] CRB RV srv Z-Score Na₂O,, 0,0 --- MgO 0, Al₂O₃,,0 --- SiO₂,0, 0, --- P₂O 0, K₂O,, 0,0 --- CaO 0, 0, 0, TiO₂ 0, Fe₂O₃ tot. 0, 0, 0, MnO 0, 0, 0, L.O.I.,0 0, Spurenelemente [µg/g] CRB RV srv Z-Score Ba 0, --- Cr,, --- Cu, 0, --- F Sr --- Legende CRB: Ergebnisse CRB RV: Ergebnisse Ringversuch -- s-rv: Standardabweichung Ringversuch Z-Score: Differenz des Messwertes vom Mittelwert des Ringversuchs -- * Wert nicht zertifiziert

2 GEOPT - AN INTERNATIONAL PROFICIENCY TEST FOR ANALYTICAL GEOCHEMISTRY LABORATORIES - REPORT ON ROUND / January 0 (OShBO - alkaline granite) Philip J. Potts *, Michael Thompson, Simon R.N. Chenery, Peter C. Webb and B. Batjargal Department of Earth Sciences, The Open University, Walton Hall, Milton Keynes, MK AA, UK. Department of Chemistry, Birkbeck College, Gordon House, London, WCH 0PP, UK. British Geological Survey, Keyworth, Nottingham, NG GG, UK. Central Geological, Trade Union Street, Ulaanbaatar-, Mongolia. *Corresponding author: p.j.potts@open.ac.uk Keywords: Proficiency testing, quality assurance, GeoPT, GeoPT round, OShBO, alkaline granite Abstract Results are presented for GeoPT, round fourteen of the GeoPT international proficiency testing programme for analytical geochemistry laboratories. The sample distributed for this round was OShBO, an alkaline granite sample collected and prepared as a candidate reference material by Central Geological Laboratories, Mongolia. In this report, contributed data are listed, together with an assessment of assigned values, z-scores and charts showing both the distribution of contributed results and the overall performance of participating laboratories. tabulated by the organisers and z-scores calculated by comparing each analysed result submitted with the value assigned to be the best estimate of the true composition. These assigned values were estimated by robust statistical analysis of all the contributed data. By examining the magnitude of the z-score, participating laboratories can decide whether the quality of their data is satisfactory in relation to both their chosen fitness-for-purpose criteria and results submitted by all the other laboratories contributing to the round, and choose to take corrective action if this appears justified. Introduction This fourteenth round of the international proficiency testing programme, GeoPT, was conducted in a similar manner to earlier rounds. The programme is designed to be part of the routine quality assurance scheme of analytical geochemistry laboratories. The trial involves distributing a sample of established homogeneity to participating laboratories, which are required to analyse the sample using a wellcharacterised technique or techniques operated under routine analytical conditions. Results are then Full details of the programme have been included in reports of previous rounds, the current publication status of which is listed in Appendix. More specifically, the procedures followed in this round comply with the protocol published for conducting the GeoPT series of proficiency tests (see In this report, therefore, only the features of the present round are included and readers interested in further details are invited to review the GeoPT protocol and previously published reports. GeoPT Report January 0

3 Steering Committee for Round : M. Thompson (Chair), P.J. Potts (Secretary), S.R.N. Chenery, P.C. Webb and B. Batjargal. Sample: The alkaline granite sample (OShBO) used in GeoPT was collected and prepared as a candidate reference material by the Central Geological, Ulaanbaatar, Mongolia. The sample was tested for homogeneity by selecting at random ten packets of the sample prepared for distribution. Duplicate test portions from each packet were analysed by WD-XRF at the OU. For the elements for which values could be assigned, homogeneity was considered to be satisfactory for use in the GeoPT round. An analysis of the results with additional comments is listed in Appendix. Timetable for GeoPT: Distribution of sample: September 0. Deadline for submission of analytical results: th November 0. Distribution of draft report: January 0 Submission of results Results submitted by the seventy-eight laboratories that participated in this round are listed in Table. All these data were used for the assessment of assigned values. Assigned values Following procedures described in earlier rounds, a robust statistical procedure was used to derive assigned value concentrations [Xa], these being judged to be the best estimates of the true composition of this sample. Data in Table lists assigned values for majors and trace elements. Values were assigned on the basis that: (i) sufficient laboratories had contributed data for an element, (ii) the statistical assessment gave confidence that the results showed a central portion approximating to a normal distribution. Part of this assessment involved examining a bar chart for each element to judge the distribution of results. Bar charts for elements shown in Figure were judged to have satisfactory distributions, namely: SiO, Al O, Fe O T, MnO, CaO, Na O, K O, LOI*, Ba*, Be*, Bi*, Ce, Cr, Cs, Cu*, Dy, Er, Eu*, Ga, Gd, Hf, Ho, La, Lu, Nb, Nd, Ni*, Pb, Pr, Rb, Sb, Sc, Sm, Sn*, Sr, Ta*, Tb, Th, Tl*, Tm, U, W*, Y*, Yb, Zn and Zr. The elements marked with a * are judged to have provisional assigned values, principally because data distributions plotted in Figure possess some degree of asymmetry. Charts in Figure show distribution data for elements that were not judged to be sufficiently satisfactory in the statistical analysis to assign values. In the present round, values could not be assigned to the following elements, despite the availability of sufficient analytical results: TiO, FeO, MgO, P O, H O +, CO *, As*, Cd*, Co*, F*, Ge*, Li*, Mo* and V*. The elements marked with a * are presented in Figure with guidance values. There is some degree of consensus in results reported for these elements to provide some guidance to contributing laboratories. However, these data must be interpreted with caution. For other elements that are not included in either of these two lists, insufficient data was reported to allow any assessment to be made. The most common reasons for elements failing the assessment of assigned values were as follows: (i) Insufficient number of contributed results. (ii) Results showing a strong positive skew in the frequency distribution diagram, sometimes with an indication of multi-modality. (iii) A robust mean clearly different from the mode, which makes the determination of a consensus impracticable. GeoPT Report January 0

4 (iv) A very wide distribution of results as judged by the robust standard deviation value so that no matter where the consensus was placed, most of the participants would receive an unsatisfactory classification if z-scores were calculated. Z-score analysis As in previous rounds, laboratories were invited to choose one of two performance standards against which their analytical results would be judged: Data quality for laboratories working to a 'pure geochemistry' standard of performance, where analytical results are designed for geochemical research and where care is taken to provide data of high precision and accuracy, sometimes at the expense of a reduced sample throughput rate. Data quality for laboratories working to an 'applied geochemistry' standard of performance, where, although precision and accuracy are still important, the main objective is to provide results on large numbers of samples collected as part of geochemical mapping projects or geochemical exploration programmes. The target standard deviation (Ha) for each element assessed was calculated from a modified form of the Horwitz function as follows: Ha = k.xa 0. Where Xa is the concentration of the element expressed as a fraction, and the factor k = 0.0 for pure geochemistry labs and k = 0.0 for applied geochemistry labs. Z-scores were calculated for each elemental result submitted by each laboratory from: z = [X - Xa] / Ha where: X is the contributed result, Xa is the assigned value and Ha is the target standard deviation. Z-score results are listed in Table and participating laboratories are invited to assess their performance using the following criterion: Z-score results in the range -<z< are considered to be 'satisfactory' (in the sense that no action is called for by the participant). If the z-score for any element falls outside this range, contributing laboratories are advised to examine their procedures to ensure that determinations are not subject to unsuspected analytical bias. Overall performance A summary of the overall performance of individual laboratories in this round is plotted in Figure as a multiple z-score chart. In this chart, the z-score performance for each element is distinguished by symbols that make it simple to identify whether the results were satisfactory or gave z-scores that exceeded the action limits. This chart is designed to help individual laboratories to judge their overall performance in this proficiency testing round. Participation in future rounds The benefit from proficiency testing arises from regular participation and laboratories are invited to contribute to the GeoPT round, the sample for which will be distributed during March 0. Acknowledgments The authors thank Jann Matela and Liz Lomas (OU) for valued assistance with the production of this report. The GeoPT programme is organised on behalf of the International Association of Geoanalysts. GeoPT Report January 0

5 Appendix Publication status of proficiency testing reports GeoPT Thompson M., Potts P.J., Kane J.S. and Webb P.C. () GeoPT. International proficiency test for analytical geochemistry laboratories - Report on round. Geostandards Newsletter: The Journal of Geostandards and Geoanalysis,, -. GeoPT Thompson M., Potts P.J., Kane J.S., Webb P.C. and Watson, J.S. () GeoPT. International proficiency test for analytical geochemistry laboratories - Report on round. Geostandards Newsletter: The Journal of Geostandards and Geoanalysis, -. GeoPT Thompson M., Potts P.J., Kane J.S. and Chappell B.W. (a) GeoPT. International proficiency test for analytical geochemistry laboratories - Report on round. Geostandards Newsletter: The Journal of Geostandards and Geoanalysis,, -. GeoPT Thompson M., Potts P.J., Kane J.S., Webb P.C. and Watson J.S. (b) GeoPT. International proficiency test for analytical geochemistry laboratories - Report on round. Published in the electronic version of Geostandards Newsletter: The Journal of Geostandards and Geoanalysis (Summer 00). GeoPT Thompson M., Potts P.J., Kane J.S., and Wilson S. (c) GeoPT. International proficiency test for analytical geochemistry laboratories - Report on round. Published in the electronic version of Geostandards Newsletter: The Journal of Geostandards and Geoanalysis (Summer 00). GeoPT Potts P.J., Thompson M., Kane J.S., Webb P.C. and Carignan J. (00) GEOPT - an international proficiency test for analytical geochemistry laboratories - report on round (OU-: Nanhoron microgranite) and A (CAL-S: CRPG limestone). International Association of Geoanalysts: Unpublished report. GeoPT Potts P.J., Thompson M., Kane J.S., Webb, P.C. and Watson J.S. (00) GEOPT - an international proficiency test for analytical geochemistry laboratories - report on round / February 0 (OU- Penmaenmawr microdiorite). International Association of Geoanalysts: Unpublished report. GeoPT Potts P.J., Thompson M., Webb, P.C. and Watson J.S. (0) GEOPT - an international proficiency test for analytical geochemistry laboratories - report on round / July 0 (OU- Penrhyn slate). International Association of Geoanalysts: Unpublished report. GeoPT Potts P.J., Thompson M., Webb, P.C., Watson J.S. and Wang Yimin (0) GEOPT - an international proficiency test for analytical geochemistry laboratories - report on round / December 0 (CH- Marine sediment). International Association of Geoanalysts: Unpublished report. GeoPT Potts P.J., Thompson M., S.R. Chenery, Webb, P.C. and Watson J.S. (0) GEOPT - an international proficiency test for analytical geochemistry laboratories - report on round / July 0 (OU- Leaton dolerite). International Association of Geoanalysts: Unpublished report. GeoPT Potts P.J., Thompson M., S.R. Chenery, Webb, P.C. and B. Batjargal (0) GEOPT - an international proficiency test for analytical geochemistry laboratories - report on round / January 0 (GAS Serpentinite). International Association of Geoanalysts: Unpublished report. GeoPT Potts P.J., Thompson M., S.R. Chenery, Webb, P.C. and H.U. Kaspar (0) GEOPT - an international proficiency test for analytical geochemistry laboratories - report on round / July 0 (Köln Loess). International Association of Geoanalysts: Unpublished report. GeoPT Potts P.J., Thompson M., Kane J.S., and Petrov L.L. (00) GEOPT - an international proficiency test for analytical geochemistry laboratories - report on round (GBPG- Garnet-biotite plagiogneiss). International Association of Geoanalysts: Unpublished report. GeoPT Report January 0

6 Table : GeoPT Results submitted (Nov 0) by laboratories to the GeoPT round for OShBO (alkaline granite). Round identifier O O O O O O O O O O O O O O O Sample OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO Technique codes X ISE,X ISE,X IR,X M M X X X I I A,M I AA,T,M, M X Test portion (g) Data quality SiO % m/m TiO % m/m AlO % m/m FeO % m/m Fe(II)O % m/m 0. MnO % m/m MgO % m/m CaO % m/m NaO % m/m KO % m/m PO % m/m HO+ % m/m CO % m/m LOI % m/m Ag As... Au 0.00 B Ba..... Be. Bi Br Cd 0. Ce.0... Cl Co Cr. Cs... Cu.. Dy.... Er.... Eu F 00 Ga... Gd.... Ge. Hf Hg Ho I In Ir La Li Lu Mo 0. N Nb.... Nd..... Ni... Os Pb... Pd Pr.... Pt Rb 00 Re Rh Ru S. Sb Sc Se Sm Sn Sr..... Ta... Tb Te Th Tl. Tm U V.... W.. Y Yb Zn 0.. Zr.0.. Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence. Results L0 to L were submitted too late to contribute to the assessment of assigned values.

7 Round identifier Sample Technique codes Test portion (g) Data quality SiO % m/m TiO % m/m AlO % m/m FeO % m/m Fe(II)O % m/m MnO % m/m MgO % m/m CaO % m/m NaO % m/m KO % m/m PO % m/m HO+ % m/m CO % m/m LOI % m/m Ag As Au B Ba Be Bi Br Cd Ce Cl Co Cr Cs Cu Dy Er Eu F Ga Gd Ge Hf Hg Ho I In Ir La Li Lu Mo N Nb Nd Ni Os Pb Pd Pr Pt Rb Re Rh Ru S Sb Sc Se Sm Sn Sr Ta Tb Te Th Tl Tm U V W Y Yb Zn Zr Table : GeoPT Results submitted (Nov 0) by laboratories to the GeoPT round for OShBO (alkaline granite). O O O O O O O O O O O O O O O OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO X X IR,T,X A,AA,M, A,AA,M, AA,C X X I V,X X X AA,A,IS X M,X X X E,X Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence. Results L0 to L were submitted too late to contribute to the assessment of assigned values.

8 Round identifier Sample Technique codes Test portion (g) Data quality SiO % m/m TiO % m/m AlO % m/m FeO % m/m Fe(II)O % m/m MnO % m/m MgO % m/m CaO % m/m NaO % m/m KO % m/m PO % m/m HO+ % m/m CO % m/m LOI % m/m Ag As Au B Ba Be Bi Br Cd Ce Cl Co Cr Cs Cu Dy Er Eu F Ga Gd Ge Hf Hg Ho I In Ir La Li Lu Mo N Nb Nd Ni Os Pb Pd Pr Pt Rb Re Rh Ru S Sb Sc Se Sm Sn Sr Ta Tb Te Th Tl Tm U V W Y Yb Zn Zr Table : GeoPT Results submitted (Nov 0) by laboratories to the GeoPT round for OShBO (alkaline granite). O O O O O O O O O O O O O O O OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO X X A,IR,M,X X T,X X X X X X X M M,X A,ir,ISE, X M,V Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence. Results L0 to L were submitted too late to contribute to the assessment of assigned values.

9 Round identifier Sample Technique codes Test portion (g) Data quality SiO % m/m TiO % m/m AlO % m/m FeO % m/m Fe(II)O % m/m MnO % m/m MgO % m/m CaO % m/m NaO % m/m KO % m/m PO % m/m HO+ % m/m CO % m/m LOI % m/m Ag As Au B Ba Be Bi Br Cd Ce Cl Co Cr Cs Cu Dy Er Eu F Ga Gd Ge Hf Hg Ho I In Ir La Li Lu Mo N Nb Nd Ni Os Pb Pd Pr Pt Rb Re Rh Ru S Sb Sc Se Sm Sn Sr Ta Tb Te Th Tl Tm U V W Y Yb Zn Zr Table : GeoPT Results submitted (Nov 0) by laboratories to the GeoPT round for OShBO (alkaline granite). O O O O0 O O O O O O O O O O O OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO A A,ir,M,X X X A AA,ISE, W,X I I X A,M X M,X I X X <0, < < 0, < < Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence. Results L0 to L were submitted too late to contribute to the assessment of assigned values.

10 Round identifier Sample Technique codes Test portion (g) Data quality SiO % m/m TiO % m/m AlO % m/m FeO % m/m Fe(II)O % m/m MnO % m/m MgO % m/m CaO % m/m NaO % m/m KO % m/m PO % m/m HO+ % m/m CO % m/m LOI % m/m Ag As Au B Ba Be Bi Br Cd Ce Cl Co Cr Cs Cu Dy Er Eu F Ga Gd Ge Hf Hg Ho I In Ir La Li Lu Mo N Nb Nd Ni Os Pb Pd Pr Pt Rb Re Rh Ru S Sb Sc Se Sm Sn Sr Ta Tb Te Th Tl Tm U V W Y Yb Zn Zr Table : GeoPT Results submitted (Nov 0) by laboratories to the GeoPT round for OShBO (alkaline granite). O O O O O O O O O O O O O0 O O OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO X A,M AA,A,E,I AA,A,E,I X A,M,O,X M,X AA,E,O, AA,O,T, X X A,M,X X M M SE, SE, S,X X Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence. Results L0 to L were submitted too late to contribute to the assessment of assigned values.

11 Round identifier Sample Technique codes Test portion (g) Data quality SiO % m/m TiO % m/m AlO % m/m FeO % m/m Fe(II)O % m/m MnO % m/m MgO % m/m CaO % m/m NaO % m/m KO % m/m PO % m/m HO+ % m/m CO % m/m LOI % m/m Ag As Au B Ba Be Bi Br Cd Ce Cl Co Cr Cs Cu Dy Er Eu F Ga Gd Ge Hf Hg Ho I In Ir La Li Lu Mo N Nb Nd Ni Os Pb Pd Pr Pt Rb Re Rh Ru S Sb Sc Se Sm Sn Sr Ta Tb Te Th Tl Tm U V W Y Yb Zn Zr Table : GeoPT Results submitted (Nov 0) by laboratories to the GeoPT round for OShBO (alkaline granite). O O O O O O O O O O O O O O O OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO A,M,X A,M,T,X M,X A,I,M,X X AA,A,M, X A,M,X X AA,S,T, X M,X AA,G,S X A,M,X - A,AA,ir, T,X Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence. Results L0 to L were submitted too late to contribute to the assessment of assigned values.

12 Round identifier Sample Technique codes Test portion (g) Data quality SiO % m/m TiO % m/m AlO % m/m FeO % m/m Fe(II)O % m/m MnO % m/m MgO % m/m CaO % m/m NaO % m/m KO % m/m PO % m/m HO+ % m/m CO % m/m LOI % m/m Ag As Au B Ba Be Bi Br Cd Ce Cl Co Cr Cs Cu Dy Er Eu F Ga Gd Ge Hf Hg Ho I In Ir La Li Lu Mo N Nb Nd Ni Os Pb Pd Pr Pt Rb Re Rh Ru S Sb Sc Se Sm Sn Sr Ta Tb Te Th Tl Tm U V W Y Yb Zn Zr Table : GeoPT Results submitted (Nov 0) by laboratories to the GeoPT round for OShBO (alkaline O O O OShBO OShBO OShBO A,X A,M,X A,ir,M,T, X Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence. Results L0 to L were submitted too late to contribute to the assessment of assigned values.

13 Table GeoPT (OShBO-alkaline granite) Assigned values and robust statistical analysis of contributed data X a H a sdm sdm/h a status X a H a sdm sdm/h a status % m/m % m/m % m/m mg/kg mg/kg mg/kg SiO assigned Lu assigned AlO assigned Nb assigned FeO assigned Nd assigned MnO assigned Ni provisional CaO assigned Pb assigned NaO assigned Pr assigned KO assigned Rb 0. assigned LOI provisional Sb assigned mg/kg mg/kg mg/kg Sc assigned Ba provisional Sm assigned Be provisional Sn provisional Bi provisional Sr assigned Ce assigned Ta provisional Cr assigned Tb assigned Cs assigned Th assigned Cu provisional Tl provisional Dy assigned Tm assigned Er assigned U assigned Eu provisional W provisional Ga assigned Y provisional Gd assigned Yb assigned Hf assigned Zn assigned Ho assigned Zr assigned La assigned X a=assigned value calculated as the robust mean of submitted data. H a=target precision calculated using a modified version of the Horwitz equation for Data quality (Ha=0.0Xa 0. ). sdm=standard deviation of the mean calculated from submitted data using robust statistics.

14 Table : GeoPT Z-scores for laboratories participating in the GeoPT round for OShBO (alkaline granite). Round identifier O O O O O O O O O O O O O O O O O O O O O O O O Sample OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO Technique codes X ISE,X ISE,X IR,X M M X X X I I A,M I AA,T, M X X IR,T,X A,AA, A,AA, AA,C X X I M,X M,X M,X Test portion (g) Data quality SiO * -0. * * * * * 0.0 * 0.0 * * * AlO. -0. * -0. * * * * * * * * FeO. -0. * -. * * 0.. * * * * MnO. 0. * -0. * * * * * * * * CaO. -. * -. * * -0.. * * *.0 * -0. * * * NaO.. * 0.0 * * * * * * KO. -0. * 0. * * * * * * * LOI * 0. * -. * * * * *. * -. * * * Ba * * * * -.0 * * *.0 * * 0. * * * * 0.0 * * * * Be * * * * * * * * * * * * * * 0. * * * * -. * * * * Bi * * * * * * * * * * * * * * * * * * * * *. * * Ce * * * *. * * * * -0. * * * * -. * * *. Cr * * * -0. * * * * -. * *. * -0. * Cs * * * * 0. * * * * * * * * * * * * -. Cu * * * * * * *. * * *. * -0. * * * * * * * * Dy * * * * 0. * * * * * * * * *. * * * * * Er * * * * 0. * * * * * * -.0 * * * *. * * * * * Eu * * * * -0. * * * *.0 * -. * * * *. * * * *. Ga * * * * * * * * -0. * * * * * -0. * * * * * * Gd * * * * 0. * * * * * * -. * * * *. * * * * * Hf * * * * * 0.0 * * * * * * * * * * * * 0. Ho * * * * 0.0 * * * *. * -0. * * * *. * * * * * La * * * * 0. * * * * 0. * * *. * -0. * * * -0. Lu * * * * 0. * * * * -0. * * * *.0 * * * * * Nb * * * * * * * -. * * * -0. * * -0. * -0. * * 0. * Nd * * * * 0. * * * *.0 * * * -.. * * * *. Ni * * * * * * * -. * * * 0. * * -0. * * -. Pb * * * * -0. * *. * * * * * * -0. * * Pr * * * *. * * * * * * 0. * * * *. * * * * * Rb. * * *.0 * * -0. * * * 0. *. *.0 * -. Sb * * * * * * * * * *..0. * -0. * * * * * * * * 0. Sc * * * * * * * * -. * * * * * -. * * * -. Sm * * * * 0. * * * * 0. * * * *.0 * * * * 0. Sn * * * * * * * * * * * -0. * * * -0. * * * * * * * * Sr * * * * -0. * *. * * * 0. * * 0. *. * * -. * Ta * * * * * * * * * * * * * * * * * * * 0. Tb * * * * 0. * * * *. * * * *. * * * * -. Th * * * * -0. * * *. * * -0. * * * -0. * 0. Tl * * * * * * * * * * * * * *.0 * * * * * * * * * Tm * * * * * * * * * * * 0.0 * * * *. * * * * * U * * * * -0. * * * 0. * * * * * * *. * 0. W * * * * * * * * * * * * * * * * *. * * * -. Y * * * * -0. * * -. * * * -0. *. -0. * *. * -. * 0. * * Yb * * * * 0. * * * * -0. * * * *. * * * *. Zn * * * * * * * 0.0 * * * -. * -.0 * -0. * 0.0 * Zr * * * * * 0. *. * * * -0. * 0.0 *. * -. *. * * 0. * Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence.

15 Round identifier Sample Technique codes Test portion (g) Data quality SiO AlO FeO MnO CaO NaO KO LOI Ba Be Bi Ce Cr Cs Cu Dy Er Eu Ga Gd Hf Ho La Lu Nb Nd Ni Pb Pr Rb Sb Sc Sm Sn Sr Ta Tb Th Tl Tm U W Y Yb Zn Zr Table : GeoPT Z-scores for laboratories participating in the GeoPT round for OShBO (alkaline granite). O O O O O O O O O O O O O O O O O O O O O O O O OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO V,X X X AA,A,I SE,X X M,X X X A,IR,M,X X T,X X X X X X X M M,X A,ir,IS E,M,V X A A,ir,M, X X * * -. * * * * 0.. * * -0. * * * *. 0. * * -. * * * * -.. * * 0. * * * * * *. * * * * *...0 * * -0. * * * * * * -. * * * *... * *. * * * *.. * * * 0. * -. *. * -. * * -. * * * *. *. * * 0. * * * * * -. * * * * 0. * * * * -. * * 0. * -. * * * * * -. * *. 0.. * *. * * * *. * * -0. * *.0 * * * -. *.. * * -. *. *. * * * -0. * * * * * * * -.0 * * * * -. * * * * -0. * * * -. * -. * *. *. * *. * * * *. * 0. * * -0. * * * * * * * * -... * * -. * * * * 0. * 0. * * -. * * * * * * * * * * -. * * * *. * -. * * * * * * * * * * * * * * * *. * * * -.. * -. * * * * * *. * * -0. * * * *. * -0. * * -0. * * * * * * * * * * -. * * * * * * -0. * * -. * * * * -. * * * * * -0. * * * * * * 0. * * -. * * * * * * * * * * -. * * * * -0. * * -.0 * *. * * * * * -. * * * * -0. * 0. * * -0. * * * * * * * * * * -.0 * * * 0. * -0. * -. * * -0. * *. * * * * 0. * * -0. * * * * * * * -. *.. * * * -. *. * *... * *. *. -0. * -0. * * -.0 * -. *. * * * -0. * * * *. * * -. * * * * * * * * * * -. * * * -0. *. * -. * * 0. * * * * *. * * * * -0. * * * * * * * * * * * * * 0. * * *. * * 0. * * * * * * * * * -. * * * * -0. * 0. * * -. * * * * * * * * * * -. * * * * 0. * * * * -. * * * * * * * -..0 * * -. *. 0. * * -. *. * * * *. * * * * * * -0. * * -0. * * * * * * * * * * -. * * * * * * 0. * * -0. * * * * * * * * * * -.0 *. * * -0. * -. * * -. * * * *. * 0. * * -. * * * * * * -. * * -. * * * * * * * * * * * * * * * * * 0. * * -0. * * * * * * * * * * -.0 * * *.0. * -. * * -0. * * * * * * -. * * -0. * * * * * * * * * * * * * * * * * * * * * * *. * -0. *. 0. * -0. * -. * * -0. *. * * -. * * * * * * -.0 * * * * *.0 * * * * -. *. * *. -. * -0. * * -. * -.. * *. *.. * * -.0 *. * * * * -0. * Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence.

16 Round identifier Sample Technique codes Test portion (g) Data quality SiO AlO FeO MnO CaO NaO KO LOI Ba Be Bi Ce Cr Cs Cu Dy Er Eu Ga Gd Hf Ho La Lu Nb Nd Ni Pb Pr Rb Sb Sc Sm Sn Sr Ta Tb Th Tl Tm U W Y Yb Zn Zr Table : GeoPT Z-scores for laboratories participating in the GeoPT round for OShBO (alkaline granite). O0 O O O O O O O O O O O O O O O O O O O O O O O OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO X A AA,IS E,W,X I I X A,M X M,X I X X X A,M AA,A, E,ISE, AA,A, E,ISE, X A,M,O,X M,X AA,E, O,S,X AA,O, T,X X X A,M,X * * * * * * * * * * * -.0 * * * * * * -. * * * * * * -0. * * * * * * * -. * * * * * * * * * * * * *. * * * * *. 0. * * * * * * * * * * *...0 *. *. -0. * * * -.. *. * * * * -.0 * * * * -0. * * * * * * -.0 *. * 0. * -. * * * * * * * * * * * * * * * * * * * *. * * * * -. *. * * -0. * *. * * * * * -. * * * * *. * * -.. * * 0. * * * -0. * *. * * * * * * 0. * *.0 * * * * * * * *.0. * * 0. *.. 0. * -.0. * * * * * *. * * 0.0 *. * * * * * * * * * -. * * -0. * * * * * * 0. *.0 * * * * * * * * *. * * -0. * * * * * * -. *.. * * * * * * * 0. * * 0. * * -. * * -0. * 0. * * * * * *. -0. * * 0. * * * * * * * * * -0. *. * * * * * * * * *. * * 0. * * * 0.0 * * 0. * * * * * *. *. * * -. * * * * * * * * * 0. *. * * * * * * * * *. * * -0. * -. * 0. * * -0. * 0... *. -. * * * *. * * -. * * * -0. * * -0. * * * * 0. * * * * * * * 0.0 * * * * * * * *. * * *. * -.0 * *. * -0. * * * * * * * * * 0. * * *. * * * * -.. * 0. * * * * * * * * * * * * 0. * *.. * * 0. * * * * * * 0. * -0. * * * * * * * * * -0. * * * * * * * -. * * * 0. *. * * * * * * * * * * * -0. * * * -. * * -.0 * * * * -. * 0. * * -0. * * -. *. * -. * * * * * * *. * * -0. *. 0. * * * * * * * * 0. * * -.0 * -..0 * * * -0. * * * * * * -. *. * * * * * * * * * -.. * * 0. * * * * -. * * 0. * * * -. * * 0. * * * * * *. * -.. *. * * * * * * -0. * * 0.0 *. 0. * * * * * * * *. * * 0.0 * * * -0. * * * -0. * * * *.0 * *. * * -0. * * * -. * * * * * * -0. * 0. * 0. * * * * * * * * * * * * -0. * 0. * * * * * * * * * * * * -0. * * * * -. * * -. * * * -0. * * -. * *. * * * * 0. * * * * * * * *. * * * -. * * -. * * * * -. * * * *.0 *. *.. * -. * * * * *. *. * -0. * * -0. * -0.. * * * * * * * *. * * * * *. * * 0.. * * * * * * * *. * 0. * * * 0. Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence.

17 Round identifier Sample Technique codes Test portion (g) Data quality SiO AlO FeO MnO CaO NaO KO LOI Ba Be Bi Ce Cr Cs Cu Dy Er Eu Ga Gd Hf Ho La Lu Nb Nd Ni Pb Pr Rb Sb Sc Sm Sn Sr Ta Tb Th Tl Tm U W Y Yb Zn Zr Table : GeoPT Z-scores for laboratories participating in the GeoPT round for OShBO (alkaline granite). O0 O O O O O O O O O O O O O O O O O O O O OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO OShBO X M M A,M,X A,M,T, X M,X A,I,M, X X AA,A, M,X A,M,X X AA,S,T,X M,X AA,G, S X A,M,X - A,AA,ir,T,X A,X A,M,X A,ir,M, T,X * * * * * * * * * * * * * * * * * -.. * * * * * * * * * * * *. -. * * * 0. * * * * *. 0. * * * -. * * -.0 * 0.0 * -. * * * * * -.0 * -. * * * * * * * * * * * * 0. * * -. *. * * * -0. * * -0. * *. * * *. * -.. * 0. * 0.. * * -. * *. * * *. * * * * * -. * * 0. * -. * * 0. * *. -0. * * -0. * * -.0 * -. * * * * -0.. * -. * * -. *. *. -0. * * *. * 0. * * * -. * * 0. * * * * * *. * 0. * * * -. * * 0. * * * * * * *. * * * * * -. * * -. * * * *. *. * 0.. * * * * * -..0 * * * 0. * *. * 0.0 * * * -. * * 0. * * * * 0. *. * * 0.. * * -. * * 0.0 * -. * * -0. * -0. * -.. *. * 0. * * * -. * * 0. * * * *. * -.. * 0. * 0. * * * -. * * 0. * * * * 0. * -.0. * 0. * 0. * * * -. * * 0. * * * * 0. * -0. * * * * -. * * 0. * * * -0. * 0. * * * -.0 * * 0. * * * * * * * -. * * 0. * 0.0 * * * * * -0.. * * * 0. * * *.0 * -.0. * 0.0 * 0. * * * -0. * * 0. * * * * * 0... * * *. *.0-0. * * * * * 0.0 * * -.0 * -0. * * *. * * -0. * * * * * * * * 0.. * 0. * 0. * * * 0. * *. *. * * * * 0. * -.. *. * -0. * * * -. * *.0 * * * * * * 0. * * * * -. * * -. * *. * * * * * * *. * -. *.. * -. * *. * *. -. * * -. *. * * -0. * 0. * *. * 0. * * * -.0 * * 0. * * * * -0. *.0. * -0. * *.0 -. * * 0. *. * * * * 0.0 * *. *. * * * -0. * * * * * * * -. * -0. * * 0. * * * 0. * * * -. * * 0. * * * * 0. * 0. * -0.. * 0. *. * * * -. * * 0. * * * * -0. *. * * 0. * 0.0 * * *. * * * * * * * * * -0. * 0..0 * * * * * -. * * -0. * * * * 0. * 0. * * * -. * * 0. * * * * *. 0.. * * *. * * -0. * * * *. * * 0. Technique codes: A=ICP-AES; AA=AAS; C=colorimetry; E=(atomic) emission spectrometry; G=gravimetric; I=INAA; IR= infra red detection; ISE=ion selective electrodes; M=ICP-MS; O=other; S=spectrophotometry, T=titrimetry; W=wet chemistry; X=X-ray fluorescence.

18 Concentration SiO / % m/m GeoPT Alkali Granite - Barchart for SiO Concentration AlO / % m/m GeoPT Alkali Granite - Barchart for AlO GeoPT Alkali Granite - Barchart for FeO GeoPT Alkali Granite - Barchart for MnO Concentration FeO / % m/m Concentration MnO / % m/m Concentration CaO / % m/m GeoPT Alkali Granite - Barchart for CaO Concentration NaO / % m/m... GeoPT Alkali Granite - Barchart for NaO 0 0 GeoPT Alkali Granite - Barchart for KO 0 0 GeoPT Alkali Granite - Barchart for LOI Concentration KO / % m/m.0..0 Concentration LOI / % m/m.. 0. Provisional Figure GeoPT OShBO alkaline granite: Data distribution charts for elements for which values were assigned. Horizontal lines show the limits for -<z< for pure geochemistry labs (solid lines) and -<z'< for applied geochemistry labs (pecked lines).

19 GeoPT Alkali granite - Barchart for Ba GeoPT Alkali granite - Barchart for Be Concentration Ba / ppm Provisional Concentration Be / ppm 0 0 Provisional 0 GeoPT Alkali granite - Barchart for Bi GeoPT Alkali granite - Barchart for Ce Concentration Bi / ppm 0 Provisional Concentration Ce / ppm GeoPT Alkali granite - Barchart for Cr GeoPT Alkali granite - Barchart for Cs Concentration Cr / ppm 0 0 Concentration Cs / ppm Concentration Cu / ppm 0 GeoPT Alkali granite - Barchart for Cu Provisional Concentration Dy / ppm... GeoPT Alkali granite - Barchart for Dy 0. Figure GeoPT OShBO alkaline granite: Data distribution charts for elements for which values were assigned. Horizontal lines show the limits for -<z< for pure geochemistry labs (solid lines) and -<z'< for applied geochemistry labs (pecked lines).

20 GeoPT Alkali granite - Barchart for Er GeoPT Alkali granite - Barchart for Eu Concentration Er / ppm.0. Concentration Eu / ppm Provisional GeoPT Alkali granite - Barchart for Ga GeoPT Alkali granite - Barchart for Gd Concentration Ga / ppm 0 0 Concentration Gd / ppm GeoPT Alkali granite - Barchart for Hf GeoPT Alkali granite - Barchart for Ho. Concentration Hf / ppm Concentration Ho / ppm GeoPT Alkali granite - Barchart for La GeoPT Alkali granite - Barchart for Lu 0. Concentration La / ppm Concentration Lu / ppm Figure GeoPT OShBO alkaline granite: Data distribution charts for elements for which values were assigned. Horizontal lines show the limits for -<z< for pure geochemistry labs (solid lines) and -<z'< for applied geochemistry labs (pecked lines).

21 0 GeoPT Alkali granite - Barchart for Nb GeoPT Alkali granite - Barchart for Nd Concentration Nb / ppm Concentration Nd / ppm Concentration Ni / ppm GeoPT Alkali granite - Barchart for Ni Provisional Concentration Pb / ppm GeoPT Alkali granite - Barchart for Pb 0 0 GeoPT Alkali granite - Barchart for Pr 00 GeoPT Alkali granite - Barchart for Rb Concentration Pr / ppm Concentration Rb / ppm GeoPT Alkali granite - Barchart for Sb 0 GeoPT Alkali granite - Barchart for Sc Concentration Sb / ppm Concentration Sc / ppm Figure GeoPT OShBO alkaline granite: Data distribution charts for elements for which values were assigned. Horizontal lines show the limits for -<z< for pure geochemistry labs (solid lines) and -<z'< for applied geochemistry labs (pecked lines).

22 . GeoPT Alkali granite - Barchart for Sm 0 GeoPT Alkali granite - Barchart for Sn Concentration Sm / ppm Concentration Sn / ppm Provisional GeoPT Alkali granite - Barchart for Sr GeoPT Alkali granite - Barchart for Ta Concentration Sr / ppm Concentration Ta / ppm Provisional Concentration Tb / ppm GeoPT Alkali granite - Barchart for Tb Concentration Th / ppm GeoPT Alkali granite - Barchart for Th 0. Concentration Tl / ppm GeoPT Alkali granite - Barchart for Tl Provisional Concentration Tm / ppm GeoPT Alkali granite - Barchart for Tm Figure GeoPT OShBO alkaline granite: Data distribution charts for elements for which values were assigned. Horizontal lines show the limits for -<z< for pure geochemistry labs (solid lines) and -<z'< for applied geochemistry labs (pecked lines).

23 GeoPT Alkali granite - Barchart for U GeoPT Alkali granite - Barchart for W Concentration U / ppm Concentration W / ppm Provisional 0 0 GeoPT Alkali granite - Barchart for Y GeoPT Alkali granite - Barchart for Yb Concentration Y / ppm 0 Provisional Concentration Yb / ppm 0 GeoPT Alkali granite - Barchart for Zn 0 GeoPT Alkali granite - Barchart for Zr Concentration Zn / ppm 0 Concentration Zr / ppm Figure GeoPT OShBO alkaline granite: Data distribution charts for elements for which values were assigned. Horizontal lines show the limits for -<z< for pure geochemistry labs (solid lines) and -<z'< for applied geochemistry labs (pecked lines).

24 Concentration TiO / % m/m GeoPT Alkali granite - Barchart for TiO Concentration Fe(II)O / % m/m GeoPT Alkali granite - Barchart for Fe(II)O Concentration MgO / % m/m GeoPT Alkali granite - Barchart for MgO Concentration PO / % m/m GeoPT Alkali granite - Barchart for PO 0 0 GeoPT Alkali granite - Barchart for HO+ 0 0 GeoPT Alkali granite - Barchart for CO Concentration HO+ / % m/m Concentration CO / % m/m Guidance only Figure GeoPT OShBO alkaline granite: Data distribution charts for elements for which values were not assigned.

25 GeoPT Alkali granite - Barchart for As GeoPT Alkali granite - Barchart for Cd Concentration As / ppm Guidance only Concentration Cd / ppm Guidance only GeoPT Alkali granite - Barchart for Co 000 GeoPT Alkali granite - Barchart for F Concentration Co / ppm Guidance only Concentration F / ppm Guidance only Concentration Ge / ppm 0 GeoPT Alkali granite - Barchart for Ge Guidance only Concentration Li / ppm GeoPT Alkali granite - Barchart for Li Guidance only. GeoPT Alkali granite - Barchart for Mo GeoPT Alkali granite - Barchart for V Concentration Mo / ppm Guidance only Concentration V / ppm Guidance only Figure GeoPT OShBO alkaline granite: Data distribution charts for elements for which values were not assigned.

26 GeoPT Alkali Granite - Multiple z-score Chart Analyte Name SiO AlO FeO MnO CaO NaO KO LOI Ba Be Bi Ce Cr Cs Cu Dy Er Eu Ga Gd Hf Ho La Lu Nb Nd Ni Pb Pr Rb Sb Sc Sm Sn Sr Ta Tb Th Tl Tm UW Y Yb Zn Zr* z<- -<z<- -<z< <z< z> Identity Code Analyte Name SiO AlO FeO MnO CaO NaO KO LOI Ba Be Bi Ce Cr Cs Cu Dy Er Eu Ga Gd Hf Ho La Lu Nb Nd Ni Pb Pr Rb Sb Sc Sm Sn Sr Ta Tb Th Tl Tm UW Y Yb Zn Zr* z<- -<z<- -<z< <z< z> 0 Identity Code Analyte Name SiO AlO FeO MnO CaO NaO KO LOI Ba Be Bi Ce Cr Cs Cu Dy Er Eu Ga Gd Hf Ho La Lu Nb Nd Ni Pb Pr Rb Sb Sc Sm Sn Sr Ta Tb Th Tl Tm UW Y Yb Zn Zr* z<- -<z<- -<z< <z< z> 0 Identity Code Figure GeoPT OShBO alkaline granite: Multiple z-score charts for laboratories participating in the GeoPT round. Symbols indicate whether or not an elemental result complies with the -<z<+ criteria Satisfactory data are plotted as ' '. Data for other categories are plotted as follows: z<- ( ), -<z<- ( ), +<z<+ ( ), Z>+ ( ).