Fire assay cupellation has been used by gold refiners, fabricators, mines, and mints for the analysis of gold in bullion. This program provides participating laboratories the opportunity to evaluate the accuracy of their assays, using a clear and defined standardized testing procedure. Over 30 laboratories participate in the program. ASTM's Committee E01 on Analytical Chemistry of Metals, Ores, and Related Materials, consisting of over 190 members and developer of over 140 standards, provides the technical direction for these programs.

Each laboratory returns their completed test data to ASTM for use in generating statistical summary reports. Participants are permitted to use other methods in the analysis of the test sample. The methods utilized must be documented on the data report form. Laboratories unable to follow a specific ASTM method to the ultimate detail due to specific equipment features and workload requirements are required to identify those areas where deviations occur.

The data generated will be statistically analyzed. Final summary reports, provided to participants only, contain:

• Each participating laboratory's test results (coded for confidentiality)
• Statistical analysis of test data
• Charts plotting test results versus laboratory code

For more information, contact us.

TEST SAMPLES

Test samples are provided by the Metalor USA Refining Corp. The samples provided are homogeneity tested in accordance with Part A of ASTM E 1335 Test Methods for Determination of Gold in Bullion by Cupellation. At the conclusion of testing, laboratories keep the remaining test sample material. Samples are wire (<2mm) or pin tube and are representative of the following concentration ranges of gold: high-range, 90-99 percent Au, 5-9 percent Ag, 0-3 percent Cu; mid-range, 60-90 percent Au, 10-40 percent Ag, 1-5 percent Cu; low-range, 25-60 percent Au, balance Ag, 1-5 percent Cu. Each lab receives two samples each test cycle with one sample each from two of the three ranges above.

TEST METHODS

ASTM E1335

DISTRIBUTION OF SAMPLES

Samples distributed from Metalor USA. Shipping cost is included in the registration fee.