PROCESS CONTROL AND CONCENTRATE-GRADE ANALYSIS
Instrumental and gravimetric analysis CODE
Gravimetric analysis CODE
ELEMENT LIMIT(S)
DESCRIPTION
ELEMENT LIMIT(S)
DESCRIPTION
Au Au Au
0.01- 1,000 ppm 0.01- 1,000 ppm
30/50 g, Fire assay, AAS finish 30 g, Fire assay, AAS finish 30 g, Fire assay, gravimetric finish
Au Ag Au Ag Au
30 g, Fire assay, AAS finish (Au) gravimetric finish (Ag)
GC_FAA30V10/FAA50V10
GO_FAG32V
0.01 - 100 ppm 10 - 100 ppm 0.5 - 10,000 ppm 10 - 10,000 ppm 0.01 - 100 ppm
GC_FAG32V GC_FAG33V
≥ 0.5 ppm
30 g, Fire assay, gravimetric finish (Au, Ag)
GO_FAG33V
50 g, Fire assay, AAS finish (Au), gravimetric finish (Ag)
GO_FAG52V
Gold in process solutions CODE
ELEMENT LIMIT(S)
DESCRIPTION
CONTROL AND CONCENTRATE-GRADE ANALYSIS
Au Au
Solution, Fire assay, AAS finish Solution, Fire assay, ICP-OES finish
GC_FSA84T GC_FSI84T*
≥ 0.01 mg/L ≥ 0.01 mg/L
Instrumental and gravimetric analysis CODE
ELEMENT LIMIT(S)
DESCRIPTION
These methods are also applicable to cyanide liquors. *Pt and Pd can be added to GC_FSI84T.
Ag Au Ag Au Ag Ag Ag
Variable wt, 4-acid digest, AAS finish
GC_AAS43V100
1 - 1,000 ppm
30 g, Fire assay, AAS finish (Au) gravimetric finish (Ag)
GC_FAG32V
0.01 - 1,000 ppm
Gold in cyanide liquors CODE
≥ 10 ppm ≥ 0.5 ppm ≥ 10 ppm
ELEMENT LIMIT(S)
DESCRIPTION
30 g, Fire assay, gravimetric finish (Au, Ag)
GC_FAG33V
Au Au
CN solution, AAS finish
GC_AAS82T GC_ AAS82X
≥ 0.05 mg/L ≥ 0.001 mg/L
Solvent extraction, DIBK, AAS finish
Carbon, 1 g, ash, acid digest, extract, AAS finish 100-500 mg, Fire assay, gravimetric finish
GC_ACA22D100V
2 - 2,000 ppm 0.01 - 99.5%
GC_BUL36V
Gold in carbon CODE GC FAA01V100 GC ACA22D100V
EXPLORATION GRADE ANALYSIS Gold, platinum, palladium and other precious metals
ELEMENT LIMIT(S)
DESCRIPTION
Au Au Au
1- 2 g, Fire assay, AAS finish 1 g, Ash, acid digest, AAS finish 1 - 2 g, Fire assay, gravimetric finish
5 - 20,000 ppm 5 - 250,000 ppm
Gold, platinum and palladium CODE
GC_FAG01V
≥ 7.5 ppm
ELEMENT LIMIT(S)
DESCRIPTION
Au
GE_FAI30V5/FAI50V5
1 - 10,000 ppb
30/50 g, Fire assay, ICP-MS finish
Gold bullion CODE
Pt
10 - 10,000 ppb 1 - 10,000 ppb 1 - 2,000 ppb 0.5 - 2,000 ppb 0.5 - 2,000 ppb 5 - 10,000 ppb 10 - 10,000 ppb 5 - 10,000 ppb
ELEMENT LIMIT(S)
DESCRIPTION
Pd Au
Au
100- 500 mg, Fire assay, gravimetric finish
GC_BUL36V
0.5 - 99.5%
GE_FAM30V5/FAM50V5
30/50 g, Fire assay, ICP-MS finish
Pt
Pd Au
Acid digestion - instrumentation CODE Silver EXLPORATION GRADE ANALYSIS
30/50 g, Fire assay, ICP-OES finish
GE_FAI31V5/FAI51V5
Pt
Pd
ELEMENT LIMIT(S)
DESCRIPTION
ORE-GRADE ANALYSIS
Ag Ag Ag
2 g, 2-Acid digest, AAS finish 2 g, 3-Acid digest, AAS finish 2 g, 4-Acid digest, AAS finish
GE_AAS22E50 GE_AAS33E50 GE_AAS42E50
0.3 - 100 ppm 0.3 - 100 ppm 0.3 - 100 ppm
Gold, platinum and palladium CODE
ELEMENT LIMIT(S)
DESCRIPTION
30/50 g, Fire assay, ICP-OES finish
GO_FAI30V10/FAI50V10 Au
0.01 - 100 ppm 0.01 - 100 ppm 0.01 - 100 ppm
It is recommended that mineralized samples with Ag >30 ppm are analyzed using the GO_AAS21C50 method below. Silver (Ag) can also be analyzed in many multi-element packages.
Pt
Pd
ORE-GRADE ANALYSIS
Acid digestion - instrumentation CODE
ELEMENT LIMIT(S)
DESCRIPTION
Ag
0.5 g, 2-Acid digest, AAS finish
GO_AAS21C50
1 - 300 ppm
34
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