Liudmila Gorbatova and Elena Anchutina Ekaterinburg Non-Ferrous Metals Processing Plant (EZOCM)

Transcription

1 Liudmila Gorbatova and Elena Anchutina Ekaterinburg Non-Ferrous Metals Processing Plant (EZOCM) The LBMA Assaying and Refining Conference 2017, Royal Garden Hotel, Kensington, London March 2017 en.plaurum.ru

2 PLAURUM GROUP OF COMPANIES PLAURUM group of companies was organized in The group incorporates production facilities in: Russia (JSC EZOCM, JSC UPCR, LLC UPCP ), Central Europe (Safina, a.s.), the People s Republic of China (Guoda Safina), the USA (Safina Materials, Inc.), as well as sales offices in Slovakia, Poland, Romania, and Kyrgyzstan. production of industrial materials and products made of precious metals and their alloys processing poor man-made and mineral hard-to-extract raw materials containing precious metals analysis of different types of raw materials and other materials containing precious metals MAIN PLAURUM DEVELOPMENT ACTIVITIES services on purchasing, processing, refining of raw materials and refined precious metals supply engineering services on development of new technologies and products development of competences and range of services for rare-earth and non-ferrous metals

3 CENTRAL ANALYTICAL LABORATORY OF EZOCM Methods of analysis: Titrimetry Gravimetry AAS AES (ARC & SPARK) XRF (wave & ED) ICP-MS ICP-OES Fire Assay Services Providing a full range of analyses of materials based on precious metals and containing precious metals Development of reference materials based on precious metals Advantages Huge bank of reference materials - more than 150 ones More than 300 validated analytical techniques Testing for Good Delivery confirmation from 1999 (for Au, Ag, Pt, Pd) Participation in LBMA proficiency testing of gold and silver Accreditation in accordance with ISO/IEC (from 1996) Winner of Prestigious for testing laboratories award "Silver mole" (2015)

4 HISTORICAL BACKGROUND OF EZOCM AS REFERENCE MATERIAL PRODUCER EZOCM is RM producer beginning from 1965 > 1,200 RMs Pure PM (impurities) 31% 11% Au 28% Pd Ag 8% 22% Pt Others 24% 26% 19% 15% 7% 5% 4% PM alloys (impurities) PM alloys (matrix elements) Alloys of PM and nonferrous metals (matrix elements) Alloys of PM and nonferrous metals (impurities) Other matrixes contained PM Other matrix without PM Diagrams of types of RMs issued at EZOCM : Note: PM precious metal

5 ACCREDITATION in accordance with ISO Guide 34 By the Accreditation Body: Association of Analytical Centers Analytica (Russia), the member of ILAC International Laboratory Accreditation Cooperation and APLAC Asia Pacific Laboratory Accreditation Cooperation (2016) RM/CRM certification -of refined precious metals and precious metals alloys - for matrix and impurity elements RM/CRM forms chips, disks, rolled plate, plugs, template, cylinders

6 REFERERNCE MATERIAL PRODUCTION Planning Smelting of RM material; mechanical or/and thermal treatment Assessment of homogeneity Characterization Data treatment Assignment of certified value RM certificate issue

7 APPROACHES TO REFERENCE MATERIAL CERTIFICATION through interlaboratory experiment by a validated analytical technique (at EZOCM laboratories) by a standard (State secondary standard of mass fraction and mass (molar) concentration of metals in liquid and solid substances and materials, GVET , the holder is Ural Scientific Research Institute (Russia)) by preparation procedure (as precise alloy or certified mix)

8 PREPARATION PROCEDURE (as precise alloy) ADVANTIGIES Certified value doesn t depend on method of measurement Good uncertainties (up to 0.05 % rel.) Obvious traceability REQUIREMENTS/ SPECIFICIETIES Pure initial metals Precise alloy Certification for matrix elements INTERLABORATORY EXPERIMENT (ILE) ADVANTIGIES Certification for impurities Agreement of ILE results is proving certified value accuracy REQUIREMENTS/ SPECIFICIETIES Need and possibility of obtaining sufficient number of independent results Duration of ILE (up to several years) The dispersion of the ILE results is the main source of uncertainty of certified value Unobvious traceability

9 CERTIFIED VALUE ACCURACY CONFIRMATION Conformity to estimated composition of smelting mix; Testing by validated method to confirm intended use; Agreement of RMs of the set; RM comparison with analogous RM set 1,2 1,0 0,8 R² = 0,9963 Au4a- 4 Lg I 0,6 0,4 0,2 0,0 Au4a- 2 Au4a- 3 Au4a- 5-0,2-0,4 Au4a- 1-0,6-4,0-1,5-3,5-3,0-2,5-2,0 Lg C Agreement of CRMs Au4a (set) for Fe determination (arc AES, Fe nm)

10 CRMs OF EZOCM AVAILABLE FOR SALES Gold, gold alloys Au4a (set of 5 CRMs), Au4b (set of 5 CRMs), Au4aK1, Au4aK2, Au4a-0, Au4a-6, Au4a-9 uauni (set of 5 CRMs) uzpp (set of 5 CRMs) uauag (set of 9 CRMs) uau375 (set of 6 CRMs) uau750 (set of 11 CRMs) AuAgCuZn Au84 SD1, SD2 AuAg-1 U (set of 6 CRMs) AuAgCu P (set of 9 CRMs) Palladium alloys PdW3, PdW7, PdW20 Matrix Gold Jewelry gold alloys Dental gold alloys Au-Ag Gold alloys Pd-W Silver, silver alloy CH (set of 7 CRMs) CH2 (set of 9 CRMs) USS uspp (set of 4 CRMs) AgCu801, AgCu873, AgCu874, AgCu876, AgCu878, AgCu917, AgCu920, AgCu922, AgCu923, AgCu924, AgCu927, Platinum, alloys AgCu958 Ag875 Pt1(set (set of 8 of CRMs) 8 CRMs) Ag925 (set of 8 CRMs) rptrh (set of 5 CRMs) Ag960 (set of 8 CRMs) PtIr15, PtIr20 rptpdrh (set of 8 CRMs) Matrix Silver Jewelry silv er all oy s Ag-Cu Platinum Silver alloy Pt-Ir Pt-Pd-Rh 10

11 NEW ACTIVITIES Reference materials of pure precious metals (>99,99 %) certified for matrix element: - certified value of mass fraction and its uncertainty Providing proficiency testing programs : - - testing samples for 2017: jewelry gold alloy (determination of matrix elements); platinum-rhodium alloy (determination of impurities); waste automotive catalyst (Pt, Pd, Rh determination); Au995 (Au, Ag, Cu determination). Accreditation in accordance with ISP/IEC 17043:

12 Thank you for your attention! EZ OCM RM COLLECTION 12