Proficiency testing
Proficiency testing
Laboratory participation in the inter-laboratory comparisons is one of the requirements of the GOST ISO/IEC 17025:2005-2009 international standard for quality assurance of the test results.
EZOCM JSC has been accredited as a proficiency testing provider of laboratory qualification validations for compliance with the ISO 17043:2010. The list of proficiency test items includes refined precious metals; alloys based on precious metals; secondary waste, mineral raw materials containing precious metals; solutions containing precious metal ions. Samples are tested for mass fraction (mass concentrations) of elements.
Proficiency testing (PT) programs realized by EZOCM in 2024
PT index | Test item | Matrix | Ranges of element mass fraction | Test material form and mass | Recommended minimum sample portion weighing | Approach to standard deviation evaluation | Deadline for participation application | Deadline for result providing |
OCM-43-2024 | Alloyed gold | Au-Ag and nonprecious metals | Au – (72‑82)%; | Rolled plates (thickness 0.2‑0.4 mm); mass 3g* | 0.3 g | I | 1st April 2024 | 5thJuly2024 |
OCM-44-2024 | Silver | Ag | Impurities (no more 0.05 % of each) | Chips (thickness 0.2-0.4mm); mass 3 g* | 0.002 g | II | 1st April 2024 | 5thJuly 2024 |
OCM-45-2024 | Platinum scrap | Pt | Pt-(75-80) %; Ir-(0.5-1.0) %; Pd-(10-15) %; Rh-(1-5) %; Ru-(0.1-0.5) % | Rolled plates (thickness about 0.2mm); mass 5 g* | 0.07 g | III | 1st April 2024 | 5th July 2024 |
OCM-46-2024 | Waste catalyst | SiO2+Al2O3 | Pt – (0.05-0.15) %; | Powder (particle size less than 100 μm); mass 20 g* | 2 g | III | 1stMay 2024 | 5thAugust2024 |
OCM-47-2024
| Silver alloy (two PT materials)
| Ag-Cu
| Pd–(65-81) %;
| Rolled plates (thickness 0.2‑0.3mm); mass 5g* | 0.1 g | IV | 1stMay 2024
| 5thAugust 2024 |
Ag - (65-85) % | 0.2 g | III | ||||||
OCM-48-2024 | Alloyed gold | Au | Au (98.9-99.9) %. Ag (0.1-1.1) % | Rolled plates (thickness 0.2-0.3mm); mass 3 g* | 0.06g | I | 1stJune 2024 | 5th September 2024 |
OCM-49-2024 | Electronic scrap | Cu | Au-(0,001-0,005) %; Ag- (0,01-0,10) %; Pt - (0,0005-0,0050) %; Pd - (0,0005-0,0050) % | Chips (thickness about 0,5 mm); mass 10 g* | 0,5 g | III | 1stJune 2024 | 5th September 2024 |
*or more on the request.
Notes:
1For PT programs OCM-43-2024, OCM-45-2024, OCM-47-2024 and OCM-48-2024 the test material in form of disk (diameter 20 mm, thickness 2 mm) can be provided on the request.
2The performance ofPT programparticipants will be evaluated using z-score (ẑ score) in accordance with Annex B of GOST ISO/IEC 17043-2013 (similar to Annex B of ISO/IEC 17043:2023). The value of the z index or ẑ index is rounded to one decimal place.
3The standard deviation for proficiency evaluation are:
I – based on the expanded uncertainties bound of the method of quantitative chemical analysis MA IAС-71-2010;
II – according to the standard GOST 28353.1-2017 (Table 1);
III – based on the expanded uncertainties of the assigned values of the PT test item;
IV – based on the permissible diversity of reproducibility according to GOST 16321.2-70.
Laboratories may participate in proficiency testing regardless of their legal form and accreditation status. The participant chooses the measurement technique at his own discretion, taking into account the information presented in the PT program. The PT test item must be treated proficiency test items in the same manner as the majority of routinely tested.
The participant can provide measurement results obtained by different methods or operators at no additional charge for assessing of the proficiency evaluation. The proficiency testing is carried out after receiving at least two applications for participation.
Laboratories may participate in proficiency testing regardless of their legal form and accreditation status. The participant chooses the measurement technique at his own discretion, taking into account the information presented in the PT program. The PT test item must be treated proficiency test items in the same manner as the majority of routinely tested.
The participant can provide measurement results obtained by different methods or operators at no additional charge for assessing of the proficiency evaluation. The proficiency testing is carried out after receiving at least two applications for participation.
For more information, please contact us:
Elena Anchutina, Head of Reference Material Group:
Phone: +7 (343) 311-47-21, e-mail:e.anchutina@ezocm.ru
Milana Mustafina,Lead specialistof International Trade Department:
Phone: +7 (343) 311-46-29, e-mail:overseas@ezocm.ru
To establish a long term plan of proficiency testing, please fill in the questionnaire, which includes a list of items and test characteristics to organize proficiency testing programs in which your lab would like to take part and return it to us via e-mail:m.lisienko@ezocm.ruor by letter to the following postal address:
attn: Maria Lisienko, Head of Central Analytical Laboratory, EZOCM JSC, 131 Uspensky Prospect, Verkhnyaya Pyshma, Sverdlovsk Region, 624097, Russia.
Provider’s Accreditation Certificate AAC.РТР.00315
