Calibration standard

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Overview
Rocklabs certified reference materials (CRMs) are pulverised rock standards for the precious metals and PGE industries, provided with independently assigned values and certificates. They are suitable for quality assurance and control by fire assay or aqua regia digest and are supplied in multiple packaging formats to suit laboratory and production workflows.

Key features

• CRMs for Gold (Au), Silver (Ag), Platinum (Pt) and Palladium (Pd) with assigned values and 95% confidence intervals.
• Materials supplied as homogenised pulverised rock for laboratory QA/QC and method validation.
• Final values assigned by independent statisticians; each lot delivered with a Certificate of Analysis.
• Packaging options: nominal 30g and 50g sachets (approx. +2g included) and 2.5kg jars (packed 6 jars per carton).
• Matrix types include oxide and sulphide series; some materials are designated high-sulphide or oxide-specific.

Reference Materials certified for Pt, Pd and Au

• PK03 — Pt 4.291 (+/- 0.046) ppm; Pd 6.028 (+/- 0.094) ppm; Au 5.038 (+/- 0.051) ppm; Packaging: 2.5kg jars
• PK08 — Pt 2.365 (+/- 0.038) ppm; Pd 5.926 (+/- 0.119) ppm; Au 4.956 (+/- 0.073) ppm; Packaging: 30g & 50g sachets, 2.5kg jars
• PG04 — Pt 0.903 (+/- 0.007) ppm; Pd 1.196 (+/- 0.014) ppm; Au 1.004 (+/- 0.008) ppm; Packaging: 30g & 50g sachets, 2.5kg jars
• PD06 — Pt 0.424 (+/- 0.004) ppm; Pd 0.590 (+/- 0.008) ppm; Au 0.507 (+/- 0.004) ppm; Packaging: 30g & 50g sachets, 2.5kg jars

Reference Materials certified for Au and Ag (selected list)

• AuAgBlank 17 — Oxide; Au <0.001 ppm; Ag <0.05 ppm; Packaging: 50g sachets
• SL107 — Sulphide (3.2% S); Au 5.069 (+/- 0.03) ppm; Ag 30.1 (+/- 0.4) ppm; Packaging: 30g & 50g sachets, 2.5kg jars
• SN118 — Sulphide (3.3% S); Au 8.917 (+/- 0.055) ppm; Ag 49.9 (+/- 0.9) ppm; Packaging: 30g & 50g sachets, 2.5kg jars
• SP132 — Sulphide (3.5% S); Au 18.2 (+/- 0.1) ppm; Ag 84 (+/- 1.5) ppm; Packaging: 30g & 50g sachets, 2.5kg jars
• OxQ171 — Oxide; Au 34.57 (+/- 0.34) ppm; Ag 121.9 (+/- 2.3) ppm; Packaging: 30g & 50g sachets, 2.5kg jars

Reference Materials certified for Au (selected list)

• OxA187 — Oxide; Au 0.080 (+/- 0.001) ppm; Packaging: 30g & 50g sachets, 2.5kg jars
• OxB186 — Oxide; Au 0.121 (+/- 0.001) ppm; Packaging: 50g sachets, 2.5kg jars
• OxG201 — Oxide; Au 1.224 (+/- 0.007) ppm; Packaging: 30g & 50g sachets, 2.5kg jars
• SG102 — Sulphide (2.6% S); Au 0.997 (+/- 0.008) ppm; Packaging: 2.5kg jars only
• OxQ170 — Oxide; Au 24.939 (+/- 0.182) ppm; Packaging: 30g & 50g sachets, 2.5kg jars

Packaging & Notes

• 30g and 50g sachets are nominal; approximately 2 g extra is included in each sachet to ease sampling.
• Sachets available with Labcheck (material name) or Geocheck (unique number) labelling.
• Jars packaged in cartons of 6 (15 kg); minimum order usually one jar.

Customised Reference Materials
Custom, matrix-matched reference materials can be produced for mine materials or exploration targets with unusual matrices. Production options include blending screened minerals, homogeneity testing, consensus testing and formal certification where required.

Technical specifications

• Matrix types: oxide and sulphide (various %S specified per material).
• Analytes: Au, Ag, Pt, Pd with assigned values and 95% confidence intervals.
• Analytical suitability: fire assay and aqua regia digest supported.
• Value assignment: independent statistical evaluation; Certificate of Analysis supplied per lot.
• Custom production: matrix matching, homogeneity testing, consensus testing and certificates on request.