IMS-236
Crushed Gold Hosted Silicate Rock Chips Au 0.72g/t
IMS-236 is a gold hosted silicate rock certified reference material (CRM) designed for precision quality control in gold analysis via Pb fire assay, Xray photon assay, and PAL (partial leach) methods for mining and exploration laboratories. Certified in accordance with ISO 17034:2016 and ISO Guide 35:2017, this CRM is a homogenized blend of crushed silicate rock with dispersed gold, validated across 18 ISO/IEC 17025 accredited laboratories for reliability in gold analysis across multiple methods.
Key Features
- Optimized for multiple methods: Validated for Pb fire assay (AAS/ICP finish), Xray photon assay, and PAL (cyanide leach with AAS)
- Supplied in 500g or 2kg heat-sealed bags, ensuring integrity and batch consistency
- 5year validity when stored in dry, dark conditions
Key Certified Values
|
Analyte |
unit |
Certified Value (y) |
Standard Deviation (s) |
95% Confidence Interval (CI) |
||
|
1 SD |
1 SD Within Lab |
lower |
upper |
|||
|
As-received X-ray Photon Assay (500g) |
||||||
|
Au |
g/t |
0.72 |
0.035 |
0.028 |
0.69 |
0.74 |
|
Sample Preparation and Pb Fire Assay (2kg) |
||||||
|
Au |
g/t |
0.72 |
0.040 |
0.025 |
0.70 |
0.74 |
Key Informational Values
|
Analyte |
unit |
Certified Value (y) |
Standard Deviation (s) |
95% Confidence Interval (CI) |
||
|
1 SD |
1 SD Within Lab |
lower |
upper |
|||
|
As-received PAL (500g) |
||||||
|
Au |
g/t |
0.54 |
0.021 |
0.017 |
0.53 |
0.56 |
Intended Use
- QC monitoring: Calibration and validation of fire assay, photon assay, and PAL methods for gold analysis.
- Bias detection: Identifying systematic errors in laboratories processing gold samples.
- Homogeneity assurance: Certified for low variability (Pb Fire Assay RSD: 1.57%; Photon Assay RSD: 3.05%).
- Sample preparation control: Ensures accuracy in crushing, subsampling, and assay workflows.
