Jewelry Alloys (CRM 10554-2015 — 10559-2015, CRM 10614-2015 — 10622-2015)

CRMs 10554-2015 — 10559-2015 are designed for the certification of measurement methods and the calibration of measuring equipment used to determine the content of mass fraction of gold and silver by assay and x-ray method.

CRM can be manufactured as the following:

  • shavings of a maximum size of 1 mm;
  • round plates of 2 mm thickness, 20, 30 mm diameter.

CRM in the form of shavings is supplied in plastic jars with screw caps. Minimum supplied weight is 20 g.

Lifetime is 50 years.

№ of CRMCertified value of RM Au, %Uncertainty of RM certified value Au, Р = 0.95Certified value of RM Ag, %Uncertainty of RM certified value Ag, Р = 0.95
CRM 10554-2015 10.00 ± 0.02 90.00 ± 0.05

CRM 10555-2015

20.01 ± 0.03 80.00 ± 0.05

CRM 10556-2015

37.50 ± 0.02 2.02 ± 0.04

CRM 10557-2015

58.52 ± 0.02 8.02 ± 0.04

CRM 10558-2015

75.10 ± 0.02 15.02 ± 0.04

CRM 10559-2015

    92.51 ± 0.05

CRM 10614-2015

75.39 ± 0.02 24.59 ± 0.05

CRM 10615-2015

37.20 ± 0.03 10.02 ± 0.06

CRM 10616-2015

37.79 ± 0.02 16.01 ± 0.06

CRM 10617-2015

58.21 ± 0.02 8.52 ± 0.06

CRM 10618-2015

59.01 ± 0.02 7.51 ± 0.06

CRM 10619-2015

75.31 ± 0.02 12.51 ± 0.06

CRM 10620-2015

    90.02 ± 0.06

CRM 10621-2015

    91.63 ± 0.06

CRM 10622-2015

    93.99 ± 0.04