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 ?
With better outcomes from the anti-Xa assay (Paluri et al.
Therapeutic Ranges for aPTT and Anti-Xa Assay at UPMC Heparin Order Set Anti-Xa Therapeutic Ranges aPTT (seconds) (units/ML) DVT/PE 0.
Monitoring unfractionated heparin therapy: relationship between eight anti-Xa assays and a protamine titration assay.
There were no sufficient data to compare the influence of bilirubin on anti-Xa assay, because this analysis was not performed routinely in patients on ECMO, but from available data (n = 16) we noted that elevated free Hb 143 (99-198) mg/dL in plasma samples was accompanied with increased total bilirubin 10 (5-13) mg/dL; however, the correlation between these variables were poor (r =.
The lack of agreement between absolute clotting time values and heparin concentrations determined by anti-Xa assay suggests the need for reexamination of the ECMO patient management strategy, perhaps in a multicenter pilot study using an evidence-based medicine approach.
However, a significant positive bias was observed with the anti-Xa assay compared with the other methods.
Unfractionated heparin (UF) is commonly used in anticoagulant therapy and is monitored by a variety of methods including activated partial thromboplastin time (aPTT), anti-Xa assays, and during surgery or other invasive procedures by the activated clotting time (ACT).