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Carbonylmetalloimmunoassay (CMIA) a New Type of Non-Radioisotopic Immunoassay. Principles and Application to Phenobarbital Assay

Carbonylmetalloimmunoassay (CMIA) a New Type of Non-Radioisotopic Immunoassay. Principles and Application to Phenobarbital Assay

M Salmain, A Vessières, P Brossier, I S Butler, G Jaouen

J Immunol Methods. 1992 Apr 8;148(1-2):65-75.

PMID: 1564336

Abstract:

A new non-radioisotopic immunoassay procedure, which we have termed carbonylmetalloimmunoassay (CMIA), is described. The tracers used in this approach are organometallic carbonyl complexes that can be detected at femtomole levels (300-700 fmol) by Fourier transform infrared (FT-IR) spectroscopy. The validity of the technique has been tested in a phenobarbital assay using as the marker a cyclopentadienylmanganese (I) tricarbonyl (cymantrene) moiety, ethyl acetate extraction to separate the free and bound organometallic fractions, and FT-IR spectroscopy to detect the CO stretching modes of the organometallic label. Typical dilution and standard curves obtained with this CMIA procedure are presented. The method was of comparable sensitivity to a [14C] radioimmunoassay (RIA) for the detection of phenobarbital. A comparison of the results for phenobarbital assays by both CMIA and RIA showed that higher titres were obtained using the CMIA method. The standard curves suggest that CMIA is a reliable and reproducible immunoassay procedure for phenobarbital.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP12079651	Cyclopentadienylmanganese(I) tricarbonyl		12079-65-1	Price

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