MET-BLG-20
Metallurgical Testwork & Leaching
Bulk Leach Extractable Gold (BLEG) for Soil Geochemistry
Ultra-sensitive bulk leaching method for regional exploration soil and stream sediment samples, identifying faint geochemical gold halos and low-relief anomalies.
Detection Limits
0.1 ppb Au (0.0001 ppm)
Turnaround (TAT)
Standard: 4-6 Working Days
Sample Requirement
1.0 kg to 5.0 kg bulk un-pulverized stream sediment or soil
Quality Framework
ISO/IEC 17025 Compliant
Analytical Overview & Methodology
Bulk Leach Extractable Gold (BLEG) is the gold standard for regional soil and drainage surveys across large catchment areas, capturing ultra-fine gold anomalies without nugget noise.
Technical Method Specifications (MET-BLG-20)
| Method Code | MET-BLG-20 |
|---|---|
| Element Coverage | Cyanide-extractable Gold (Au), Silver (Ag), Copper (Cu) |
| Detection Range | 0.1 ppb Au (0.0001 ppm) |
| Sample Requirement | 1.0 kg to 5.0 kg bulk un-pulverized stream sediment or soil |
| Instrumentation | Tumble Leachers + Solvent Extraction (DIBK) + Graphite Furnace / Flame AAS |
| Standard Turnaround | Standard: 4-6 Working Days |
Laboratory Protocols & Execution Specs
- Sample Charge: 1kg to 5kg un-ground soil/stream sediment
- Extraction: Static bottle agitation in dilute sodium cyanide solution
- Preconcentration: Di-isobutyl ketone (DIBK) solvent extraction
- Detection: Graphite furnace AAS detection down to 0.1 ppb
JORC & NI 43-101 Data Integrity Guarantee
Every batch tested under method MET-BLG-20 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.