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Commodities
GOLD BY ACID DIGESTION (AQUA REGIA) CODE
ELEMENT
LIMIT(S)
DESCRIPTION
GE_ARE1V50
Au Au
1 - 800 ppb
50 g, Aqua regia digest, DIBK extraction, AAS finish 25/50 g, Aqua regia digest, DIBK extraction, AAS finish
GE_ARE2V25/ARE2V50 GE_ARMV25/ARMV50
0.01 - 100 ppm
Au*
1 - 500 ppb
25/50 g, Aqua regia digest, ICP-MS finish
*Additional elements are available on request Cyanide leach procedures are used to enhance small gold anomalies during exploration and to monitor gold extraction efficiencies in metallurgical applications. Bulk Leach Extractable Gold (BLEG) is a cyanide-based partial leach procedure that uses a large sample size (0.5 kg to 5 kg). It is used to enhance small gold anomalies during exploration. The cyanide leachate solution is extracted into an organic solvent and analyzed. Our active cyanide leach packages are available with a variety of sample sizes, detection limits and finishing methods. The mini
cyanide leach package is available for smaller sample sizes, allowing for faster TAT than active cyanide leach. Other elements are also partially extracted with the cyanide leach and can be measured on request.
CYANIDE EXTRACTABLE GOLD CODE
ELEMENT
LIMIT(S)
DESCRIPTION
SGS offers a wide variety of select methods to analyze specific elements, species and/or groups of elements. These methods address specific circumstances that arise due to mineralogy, chemistry or commercial requirements. A selection of commonly requested methods are listed below by commodity type, but others are available.
GE_MBLA65V30 GE_MBLI64V30 GE_BLE61K GE_ BLE61NL
Au Au Au Au
0.03 - 100 ppm 0.03 - 100 ppm 0.01 - 100 ppm 1 - 10,000 ppb
Hot, 30 g, Mini cyanide leach, AAS finish Cold, 30 g, Mini cyanide leach, ICP finish
500 g, Active cyanide leach, Solvent extraction, AAS finish 2000 g, Active cyanide leach, Solvent extraction, AAS finish
The Leachwell™ tab is a proprietary product and Leachwell™ is a patented process. Accelerated cyanide leach techniques are used to determine bulk leachable gold in exploration samples using modified cyanide leach (Leachwell™). The large sample is mixed with water and Leachwell™ tabs and tumbled. The gold is extracted into DIBK and analyzed. Other elements (Cu, Ag, Pb and Zn) are also partially extracted by the cyanide leach and can be measured on request.
Precious metals analysis
PhotonAssay Photon Assay is a non-destructive technology uses high-energy x-rays to hit samples of up to 500g, enabling rapid and enhanced analysis of gold, silver, copper and other elements. The technology is measurably safer, faster and more environmentally friendly than previous assay processes. CODE ELEMENT LIMIT(S) DESCRIPTION PAAU02 Au 0.15 - 350 ppm PhotonAssay, 2-cycle Gold services 500 PAAU02H Au 100 - 3500 ppm PhotonAssay, 2-cycle Gold services 500 PAAU02HH Au 1,000 - 10,000 ppm PhotonAssay, 2-cycle Gold services 500 Precious metals (gold, silver and the platinum group elements) can be analyzed and assayed by many techniques. Coupled with the many sample preparation options to ensure representative samples SGS sets the benchmark for reliable precious metal assays. Lower and upper reporting limits of a given method can vary slightly among SGS laboratories due to reagent quality, access to consumables and instrument availability.
ACCELERATED CYANIDE LEACH FOR GOLD CODE
ELEMENT
LIMIT(S)
DESCRIPTION
GE_LWE69J GE_LWE69K GE_LWE69L GE_LWE69M GE_LWE69N
Au Au Au Au Au
0.01 - 1,000 ppm 0.01 - 1,000 ppm 0.01 - 1,000 ppm 0.01 - 1,000 ppm 0.01 - 1,000 ppm
200 g, Accelerated cyanide leach, AAS finish 500 g, Accelerated cyanide leach, AAS finish 800 g, Accelerated cyanide leach, AAS finish 1000 g, Accelerated cyanide leach, AAS finish 2000 g, Accelerated cyanide leach, AAS finish
These methods are also available with ICP-MS finish.
ORE-GRADE ANALYSIS INSTRUMENTAL AND GRAVIMETRIC ANALYSIS CODE ELEMENT
LIMIT(S)
DESCRIPTION
GO_FAA30V10/FAA50V10 GO_FAP30V10/FAP50V10 GO_FAI30V10/FAI50V10 GO_FAG30V/FAG50V
Au Au
0.01 - 100 ppm 0.01 - 100 ppm 0.01 - 100 ppm 0.5 - 10,000 ppm 0.01 - 100 ppm 0.5 - 10,000 ppm 10 - 10,000 ppm
30/50 g, Fire assay, AAS finish 30/50 g, Fire assay, MP-AES finish 30/50 g, Fire assay, ICP-OES finish 30/50 g, Fire assay, gravimetric finish
Au **
Au Au Au Ag
GO_FAG32V/FAG52V
30/50 g, Fire assay, AAS finish (Au) gravimetric finish (Ag)
GO_FAG33V
30 g, Fire assay, gravimetric finish (Au, Ag)
Gold
GO_FAG32V/FAG52V/FAG33V ** Pt and Pd can be included.
EXPLORATION GRADE ANALYSIS FIRE ASSAY GOLD CODE GE_FAA30V5/FAA50V5 GE_FAI30V5/FAI50V5* GE_FAI31V5/FAI51V5 GE_FAM30V5 /FAM30V10 GE_FAM50V10FAM50/V5
ELEMENT
LIMIT(S)
DESCRIPTION
Au
5 - 10,000 ppb 1 - 10,000 ppb 5 - 10,000 ppb 1 - 2,000 ppb 1 - 2,000 ppb
30/50 g, Fire assay, AAS finish 30/50 g, Fire assay, ICP-OES finish 30/50 g, Fire assay, ICP-OES finish 30 g, Fire assay, ICP-MS finish 50 g, Fire assay, ICP-MS finish
Au** Au** Au** Au**
** Pt and Pd can be included. Gold in soils and/or sediments can be determined by aqua regia digest and DIBK extraction. This is a partial leach and can require a pre-treatment such as roasting if samples contain significant sulphur bearing phases.
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