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* | |
| 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%** |
|
№ |
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.
