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 ?
Clinical laboratory measurement of direct factor Xa inhibitors: anti-Xa assay is preferable to prothrombin time assay.
To confirm the heparin concentration, heparin was also measured with an anti-Xa assay on the MDA (BioMerieux).
The anti-Xa assay performs well at the lower heparin concentrations typically found in ECMO patients (0.
Heparin concentrations determined with DNNS-based electrodes correlate well with those determined with the previously reported heparin sensor-based method [11, 14], the Hepcon assay, and the chromogenic anti-Xa assay (Table 1).