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 majority of the Access hormone assays have 28-day stability.
Neural network paradigms analyze the data collected from a hormone assays and the breast rhythms.
Like intraoperative parathyroid hormone assays (5), this rapid assay could be performed in or near the operating room, especially because visual inspection of the test plate was sufficient to detect FGF-23 in all 6 tumors tested.
Until the characteristics of assays such as this have been fully accounted for, they should not be confused with free hormone assays that are sensitive, specific, and gravimetrically calibrated with an analytical balance to a scientifically acceptable mass standard.
It provides a valuable collection of assays, described in a practical way, so they can be rapidly implemented by laboratorians looking for hormone assays suitable for research purposes or as alternatives to commercial immunoassays.
Plastic versus glass tubes: effects on analytical performance of selected serum and plasma hormone assays.
Variable parathyroid hormone (1-84)/carboxyl-terminal PTH ratios detected by 4 novel parathyroid hormone assays.
We examined seven automated analyzer hormone assays, using pretreatments with both HBT and PEG of samples from healthy adults, with the aim of determining the expected change in results post treatment for both techniques for each assay.