Precious metals analysis

An optimal fire assay flux recipe and rigorous quality control program easily handle problem materials including chromite, base metal sulfides and oxides, selenides, and tellurides. Choice of crushing fineness, splitting technique and pulp size can all affect the analytical outcome of fire assay gold methods. Discuss with your local ALS laboratory for more information.

Pricing & codes: Fee Schedule CAD - USD - EUR - AUD (p 13)

When samples contain coarse gold, the metallic screening procedure is recommended for accurate results.

Pricing & codes: Fee Schedule CAD - USD - EUR - AUD (p 13)

Trace level and low-grade silver samples may be analyzed by acid digestion for maximum sensitivity and precision. Multi-element packages including Ag are listed in the Targeted Exploration section. Because silver can suffer from nugget effect, occasional duplicate analysis may help detect sampling error at these low levels. At higher grades, fire assay with larger nominal weights may be preferable.

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Full multi-element geochemical suites may be read from the same digest solution as our aqua regia and ICP-MS super trace gold method. This package mirrors our ME-MS41L method, with slight adjustments made to accommodate the larger nominal sample weight necessary for representative gold analysis.

Pricing & codes: Fee Schedule CAD - USD - EUR - AUD (p 15)

BLEG is used where cyanide leaching from a stream sediment sample may detect gold anomalies that would otherwise go unnoticed. 

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Platinum, palladium, rhodium and gold may be determined by standard lead oxide collection fire assay and ICP-MS or ICP-AES finish. For the full list of platinum group elements, nickel sulfide collection fire assay must be used for a quantitative analysis.

Pricing & codes: Fee Schedule CAD - USD - EUR - AUD (p 14)

In mining and exploration applications, cyanide leach tests are used to establish the potential cyanide extraction efficiency for gold and silver. 

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Includes gold in cyanide liquors or captured on activated carbon. Minimum sample weight required varies, contact your local lab.

Pricing & codes: Fee Schedule CAD - USD - EUR - AUD (p 14)

High precision analysis and umpire assay of precious metals in concentrates and bullion are performed by the most senior fire assay technicians and checked by certified assayers to ensure accuracy. Minimum sample weight required varies, contact your local lab.

Pricing & codes: Fee Schedule CAD - USD - EUR - AUD (p 14)

Aqua regia dissolves native gold as well as gold bound in sulfide minerals; however, depending on the composition of the soil, gold determined by this method may or may not match recovery from fire assay methods. As with our super trace methods, multi-element packages can be read from the same digestion solution as trace level gold for a complete exploration tool.

Pricing & codes: Fee Schedule CAD - USD - EUR - AUD (p 16)