OREAS: registration in the Industry register of CRMs continues!

We are pleased to inform you that EnProTech Ltd being the exclusive distributor of certified reference materials (CRMs) OREAS of ores and rocks (manufacturer – ORE Research & Exploration Pty Ltd, Australia) in Russia and the CIS countries, has completed registration of the second and third batches of OREAS in the Industry register of CRMs, that are recommended for use in laboratory-analytical support of geological prospecting and exploration works on solid mineral resources.

Thus, there are 15 OREAS CRMs in the Industry register of CRMs and work on further registration continues successfully!

Table 1. The second batch of OREAS entered in the Industry register of CRMs

№	Catalog Name	Number in Industry register	Basic Certified Values	Description
1.	OREAS 22f	916-19	Au: < 1 ppb*	CRM of quartz sand with extremely low background gold (blank)
2.	OREAS 217	917-19	Au: 0.338 ppm*	CRMs of gold-quartz ores
3.	OREAS 221	918-19	Au: 1.06 ppm*	CRMs of gold-quartz ores
4.	OREAS 620	919-19	Au: 0.685 ppm* Ag: 38.5 ppm Cu: 0.173 % Pb: 0.774 % Zn: 3.15 %	CRMs of gold-sulphide (massive sulphide-polymetallic) ores
5.	OREAS 623	920-19	Au: 0.827 ppm* Ag: 20.4 ppm Cu: 1.73 % Pb: 0.250 % Zn: 1,03%	CRMs of gold-sulphide (massive sulphide-polymetallic) ores

Table 2. The third batch of OREAS entered in the Industry register of CRMs

№	Catalog Name	Number in Industry register	Basic Certified Values	Description
1.	OREAS 600b	921-19	Au: 0.204 ppm* Ag: 25.1 ppm Cu: 499 ppm	CRMs of rich sulfide Ag-Cu-Au epithermal ores
2.	OREAS 601b	922-19	Au: 0.775 ppm* Ag: 50.1 ppm Cu: 0.101 %
3.	OREAS 602b	923-19	Au: 2.29 ppm* Ag: 118 ppm* Cu: 0.496 %**
4.	OREAS 603b	924-19	Au: 5.21 ppm* Ag: 301 ppm* Cu: 0.973 %**
5.	OREAS 604b	925-19	Au: 1.69 ppm* Ag: 507 ppm* Cu: 2.12 %**

* the values were obtained by fire assay for gold and silver. Other chemical elements and methods for determining their content in CRM you can see in analytical passports.

** the values were obtained by 4-acid digestion for silver and copper. Other chemical elements and methods for determining their content in CRM you can see in analytical passports.