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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:

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

CRM in the form of chips is supplied in plastic jars with screw caps. Minimum supplied weight is 20 g, shelf life 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 10554-201510.00± 0.0290.00± 0.05

CRM 10555-2015

20.01± 0.0380.00± 0.05

CRM 10556-2015

37.50± 0.022.02± 0.04

CRM 10557-2015

58.52± 0.028.02± 0.04

CRM 10558-2015

75.10± 0.0215.02± 0.04

CRM 10559-2015

  92.51± 0.05

CRM 10614-2015

75.39± 0.0224.59± 0.05

CRM 10615-2015

37.20± 0.0310.02± 0.06

CRM 10616-2015

37.79± 0.0216.01± 0.06

CRM 10617-2015

58.21± 0.028.52± 0.06

CRM 10618-2015

59.01± 0.027.51± 0.06

CRM 10619-2015

75.31± 0.0212.51± 0.06

CRM 10620-2015

  90.02± 0.06

CRM 10621-2015

  91.63± 0.06

CRM 10622-2015

  93.99± 0.04