immunoassay

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Related to immunoassays: ELISA, Enzyme immunoassay

Immunoassay

An assay that quantifies antigen or antibody by immunochemical means. The antigen can be a relatively simple substance such as a drug, or a complex one such as a protein or a virus. See Antibody, Antigen

The reactants are first mixed so that a varying quantity of one (A) is added to a constant amount of the other (B). The formation of an immune (antigen-antibody) complex is measured as a function of the varied reactant (A). The result is represented by a “standard curve” for reactant A. An unknown sample is tested by adding it to reactant B. The extent of the measured change is referred to the standard curve, and thereby is obtained the amount of reactant A which produces a comparable change. The amount is represented as the content of reactant A in the unknown sample. See Immunofluorescence, Immunology, Radioimmunoassay

immunoassay

[‚im·yə·nō′a‚sāy]
(immunology)
A laboratory detection method that uses antibodies to react with specific substances.
References in periodicals archive ?
8bn market for immunoassays and the finding was made in Kalorama Information's report Immunoassay Markets.
5) Healthy study participants who consumed 15 mg to 30 mg of biotin daily were shown to have biotin concentrations of over 30 ng/mL; these levels could interfere with biotin-based immunoassays.
Visit the Immunoassay Analyzers Market - Global Immunoassay Instruments and Applications Analysis and Forecast 2013-2020 report http://www.
Over 7 months, we analyzed a total of 1681 urine samples across 5 lots of the same CLIA-waived, lateral-flow immunoassay (ABMC RapidTOX[R]), according to manufacturer instructions.
The other, published April 20 in Analytical Chemistry, demonstrates the effect in immunoassays.
In addition, although almost all of the participants using immunoassays with a cutoff of 300 ng/mL detected the opiate hydromorphone at 1000 ng/mL, the many laboratories that used fluorescent immunoassay (FIA) and microparticle immunoassay (kinetic interaction of microparticles in solution) did not (UDS-A 2003) (Table 2).
4] immunoassays will give spuriously misleading values in just those conditions where you'd like to have an accurate free [T.
4] assays vary according to which immunoassay is used and which laboratory processes it.
The authors indicated that technologic advances have improved the specificity of detecting SV40 antibodies and used an enzyme immunoassay based on viruslike particles (VLPs) to perform the analysis (1).
com/research/638vb4/quantitative) has announced the addition of the "Quantitative Immunoassay Life Science Dashboard Series 2 (North America & Europe)" report to their offering.
Considering the difficulties of 25-OH Vitamin D measurements in the past, the assumption was that these standardized immunoassays will represent an improvement in inter-laboratory as well as inter-assay discrepancy.