MET-DOR-23
Metallurgical Testwork & Leaching
High-Purity Concentrate, Bullion & Gold Doré Commercial Assay
Commercial settlement-grade bullion and doré assaying using proof-corrected fire assay and gravimetric parting for gold traders, smelters, refineries, and export certification.
Detection Limits
Gold Fineness: 100 – 999.9 parts per thousand (0.01% precision)
Turnaround (TAT)
Standard: 24-48 Hours | Same-Day Rush Available
Sample Requirement
0.5g to 2.0g dip sample pin, vacuum tube sample, or bullion drillings
Quality Framework
ISO/IEC 17025 Compliant
Analytical Overview & Methodology
Settlement transactions between mining companies, bullion dealers, and commercial refineries demand zero tolerance for error. Our Proof Fire Assay Doré Service (MET-DOR-23) provides certified international fineness determination.
Technical Method Specifications (MET-DOR-23)
| Method Code | MET-DOR-23 |
|---|---|
| Element Coverage | Fineness of Gold (Au), Silver (Ag), Base Metal Impurities (Cu, Fe, Pb, Zn, Bi, As) |
| Detection Range | Gold Fineness: 100 – 999.9 parts per thousand (0.01% precision) |
| Sample Requirement | 0.5g to 2.0g dip sample pin, vacuum tube sample, or bullion drillings |
| Instrumentation | High-Precision Proof Fire Assay + Parting + Micro-Balances (6-Decimal Precision) |
| Standard Turnaround | Standard: 24-48 Hours | Same-Day Rush Available |
Laboratory Protocols & Execution Specs
- Correction Method: Proof assaying using synthetic gold-silver check bars
- Sample Taking: Vacuum dip tube pins or multi-point cross-drillings
- Accuracy: 0.1 parts per thousand (0.01%) fineness precision
- Certification: Official Certificate of Analysis for customs and refinery settlement
JORC & NI 43-101 Data Integrity Guarantee
Every batch tested under method MET-DOR-23 includes matrix-matched Certified Reference Materials (CRMs), analytical blanks, and duplicate splits at a minimum 20% insertion rate. Official digital Certificates of Analysis are digitally signed and traceable.