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 ?
For 12 samples positive for both assays, 90% and 50% inhibitory concentration (I[C.
Rosenkranz at Case Western Reserve University Medical School in Cleveland have used assay-misidentification rates to determine which assay results are inconclusive.
The combination of nuchal translucency and assay of maternal serum free hCGB and PAPP-A improves the detection of affected fetuses.
His main interests are translational research to develop novel diagnostic assays based on physiological and immune host responses, tools for clinical monitoring of immune reconstitution, and broad-spectrum immunostimulants.
Many variations for rapid assays have been proposed, but most require extensive preparation of the food source of interest.
Molecular assays currently do not provide a rapid result, and smaller microbiology labs in community hospitals generally do not offer highly sensitive virology assays.
In this study, we applied the blood collection card sampling method to the measurement of brevetoxin using a two-tiered analysis that couples a high throughput microplate receptor assay (14) and LC-MS/MS.
The active fraction was determined not to contain ATP by difference in chromatographic retention and by lack of ATP activity using an ATP-dependent in vitro luciferase assay, described below under "ATP Assay.
This Frost & Sullivan research service titled Developments in Cell Based Assays focuses on the technological advancements, emerging trends, drivers, and challenges affecting the development of cell-based assays.
The well-documented effects of environmental estrogens in animals and their potential for adverse effects in humans have led to the development of assays to identify chemicals with estrogenic activity (25).