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SCREENED METALLICS CODE
ELEMENT
LIMIT(S)
DESCRIPTION
GO_FAS30K
Au Ag Au Ag Au Ag Au Ag Au Ag Au Ag
≥ 0.01 ppm
Au, Ag, screen metallics* (75/106/212), 30 g. Fire assay
≥ 10 ppm
AAS/ICP/Gray, 500g
GO_FAS50K
≥ 0.01 ppm
Au, Ag, screen metallics* (75/106/212), 50 g. Fire assay
≥ 10 ppm
AAS/ICP/Gray, 500g
GO_FAS30M
≥ 0.01 ppm
Au, Ag, screen metallics* (75/106/212), 30 g. Fire assay
≥ 10 ppm
AAS/ICP/Gray, 1000g
GO_FAS50M
≥ 0.01 ppm
Au, Ag, screen metallics* (75/106/212), 50 g. Fire assay
≥ 10 ppm
AAS/ICP/Gray, 1000g
GO_FAS30V
≥ 0.01 ppm
Au, Ag, screen metallics* (75/106/212), 30 g. Fire assay
≥ 10 ppm
AAS/ICP/Gray, >1000g
GO_FAS50V
≥ 0.01 ppm
Au, Ag, screen metallics* (75/106/212), 50 g. Fire assay
≥ 10 ppm AAS/ICP/Gray, >1000g Note: *options for screen sizes available. Pt, Pd can be added. Finish technique is based on concentration.
PROCESS CONTROL AND CONCENTRATE-GRADE ANALYSIS INSTRUMENTAL AND GRAVIMETRIC ANALYSIS CODE ELEMENT LIMIT(S)
DESCRIPTION
GC_FAA30V10 GC_FAA50V10 GC_FAG32V
Au Au Au Ag Au Ag
0.01 - 1,000 ppm 0.01 - 1,000 ppm 0.01 - 1,000 ppm
30 g, Fire assay, AAS finish 50 g, Fire assay, AAS finish
30 g, Fire assay, AAS finish (Au) 30 g, Fire assay, gravimetric finish (Ag) 30 g, Fire assay, gravimetric finish (Au) 30 g, Fire assay, gravimetric finish (Ag)
≥ 10 ppm ≥ 0.5 ppm ≥ 10 ppm
GC_FAG33V
GOLD IN PROCESS SOLUTIONS CODE
Screen Metallic gold analysis Analytical results can be difficult to reproduce using typical sample reduction and fire assay procedures when coarse grained metallic gold is present. To address this, the sample can be analyzed using the screened metallics sample preparation and assaying procedure. This consists of: • Screening 500g/1000g or client specified weight of the sample to a defined grain size, typically 75, 106 or 212 microns • Weighing the various fractions • Assaying the entire plus fraction • Analyzing the undersize (typically in duplicate) • Calculating and reporting of size-fraction weights, coarse and fine fraction gold content and total gold content • The finish technique may involve AAS, ICP-OES or gravimetric, depending upon concentration. Limits shown are based on instrument analysis. Gravimetric limits are higher, please contact us for more information Note: This technique requires a minimum sample of 500g. This technique can also be used for coarse grained native metals such as platinum, palladium, silver and copper.
ELEMENT
LIMIT(S)
DESCRIPTION
GC_FSA84T GC_FSI84T*
Au Au
≥ 0.01 mg/L ≥ 0.01 mg/L
Solution, Fire assay, AAS finish
Solution, Fire assay, ICP-OES finish Note: These methods are also applicable to cyanide liquors. * Pt and Pd can be added to GC_FSI84T.
GOLD IN CYANIDE LIQUORS CODE
ELEMENT
LIMIT(S)
DESCRIPTION
GC_AAS82T GC_AAS82X
Au Au
≥ 0.05 mg/L ≥ 0.001 mg/L
CN solution, AAS finish
Solvent extraction, DIBK, AAS finish
GOLD IN CARBON CODE GC FAA01V100
ELEMENT
LIMIT(S)
DESCRIPTION
Au Ag Au Au Ag
5 - 20,000 ppm
1 - 2 g, Fire assay, AAS finish
≥ 50 ppm
1 - 2 g Fire Assay, gravimetric finish 1 g, Ash, acid digest, AAS finish 1 - 2 g, Fire assay, gravimetric finish 1 - 2 g Fire Assay, gravimetric finish
GC ACA22D100V
5 - 250,000 ppm
GC_FAG01V
≥ 7.5 ppm ≥ 50 ppm
GOLD BULLION CODE GC_BUL36V
ELEMENT
LIMIT(S)
DESCRIPTION
Au Ag
0.5 - 99.5% 0.01 - 99.5%
100 - 500 mg, Fire assay, gravimetric finish 100 - 500 mg, Fire assay, gravimetric finish
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