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 ?
[5] Nonstandard abbreviations: tHcy, total homocysteine; holoTC, holotranscobalamin; TC, transcobalamin; TCN2, transcobalamin 2 gene; MBA, microbiological assay; and MMA, methylmalonic acid.
Whole-blood folate values in subjects with different methylenetetrahydrofolate reductase genotypes: differences between the radioassay and microbiological assays. Clin Chem 1998;44:186-8.
Folate analysis by microbiological assays fulfills two important requirements for such screening by providing an acceptable detection limit and specificity at a low reagent cost.
We evaluated these findings using our "in house" microbiological assay (2) and fresh clinical EDTA-WB samples.
The degree of hemolysis and/or the completeness of deconjugation will obviously influence the estimation of erythrocyte folate concentrations, but may affect the accuracy and stability of the classical biological method (microbiological assay) and the now widely used competitive folate-binding protein assays (radioassays and immunoassays) differently.
The microbiological assay was carried out on microtiter plates with the chloramphenicol-resistant strain of Lactobacillus casei [10], and the radioassay was performed with the Dualcount Solid Phase Boil assay (Diagnostic Products Corp.), which was that used by van der Put et al.
Microbiological assays undertaken to check on bacterial populations--coliform, psychrotrophic, aerobic mesophilic and Salmonella populations--were not significantly different in the pea protein concentrate-formulated sausage and the control.
In addition to information obtained directly from the patient during consultation, the diagnosis of syphilis normally includes clinical examination and serological and microbiological assays. As a rule, biopsy is only required when lesions do not subside completely.
This project will adopt a multidisciplinary approach where biotransformation assays, kinetic modelling and high-throughput microbiological assays will be integrated to provide a thorough understanding of temperature dependence of micropollutant biotransformation kinetics in aerobic biological systems, taking into account the strong relationship between taxon traits and the environment.
To overcome these limitations, qPCR-based methods and classical microbiological assays should be used simultaneously to obtain more data from the factory.

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