Assay

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Assay

Metal purity test to confirm that the metal meets the standards for trading on a commodities exchange (commodities exchange center).

Assay

To test precious metals for their purity. This is important to commodities and futures involving precious metals, in which the quality of the underlying metals must be specified in the contract.

assay

A test to determine the purity of gold, silver, or other precious metals. Metals used for delivery of futures contracts must be assayed to verify that they meet standards established by the exchange on which the contracts trade.
References in periodicals archive ?
The iron in the ultrafiltrate was quantified by a chromogenic assay or AAS.
This method uses titration to a given concentration of heparin using either the protamine sulfate neutralization technique or a factor Xa inhibition chromogenic assay.
However, such fragments may still possess significant anti-Xa activity and thus be detected via the chromogenic assay.
28) As an alternative to clotting based tests, the chromogenic assays are specific, but currently lack widespread availability.