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ASSAY. A chemical examination of metals, by which the quantity of valuable or precious metal contained in any mineral or metallic mixture is ascertained. 2. By the acts of Congress of March 3, 1823, 3 Story's L. U. S. 1924; of June 25, 1834, 4 Shars. cont. Story's L. U. S. 2373; and of June 28, 1834, Id. 2377, it is made the duty of the secretary of the treasury to cause assays to be made at the mint of the United States, of certain coins made current by the said acts, and to make report of the result thereof to congress.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
The admission samples and samples taken 6 h after admission were immediately assayed by the Access AccuTnI (Beckman Coulter), and then were frozen within 8 h and stored at -20/-70 [degrees]C until analysis by the new cTnI assay.
We measured the absorbance at 420 nm and determined the [Beta]-galactosidase activity by the formula [optical density [(OD).sub.420]/[OD.sub.600] of assayed culture x volume (milliliters) assayed x time (min)] (37).
To study the correlation between the PTH concentrations measured by the Bio-PTH and I-PTH assays, we assayed 62 serum samples at the same time in the Bio-PTH and I-PTH assays.
The whole blood samples were analyzed fresh, whereas the plasma samples were stored deep-frozen for 1 week at -70 [degrees]C before being assayed in the Dade Behring BN II nephelometer with the Dade Behring N High Sensitivity CRP assay.
Samples were fractionated once, and aliquots were kept frozen until assayed, up to 3 years.
Because it is usual for rather small series to be assayed for ACTH in a clinical setting and because nonisotopic methods with stable calibration are of great practical interest, we compared these assays.
In subsequent studies, UC 1 was assayed at 20, 50, 100, 150, and 200 [micro]L, and UC 2 was assayed at 20, 40, 50, 60, 80, and 100 [micro]L; protein concentrations were derived by extrapolation of the absorbance values from a calibration curve.