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 ?
Since the introduction of recombinant human tTG antigen either in ELISA or radioligand assays (14, 17, 18), there have been few reports concerning both the clinical performance of these methods and their agreement in the detection of IgA anti-tTG as compared with EmAs.
In these respects, the earliest competitive radioligand assays clearly represented a major advance on methods for the assay of substances of biological importance available in the 1950s, permitting, for example, the determination of many hormones whose concentrations in body fluids (~[10.