Particle counting immunoassay for urinary cotinine. Comparison with chromatography, enzyme-linked immunoassay and fluorescence polarization immunoassay.

Abstract:

:Urinary cotinine was measured according to its inhibitory activity on the agglutination of cotinine-coated latex particles by anti-cotinine antibodies, the agglutination being measured by optical counting of the remaining non-agglutinated particles (particle counting, PaC). The detection limit was 0.03 microgram/ml and the practical range extended from 0.03 to 3.9 micrograms/ml. The correlation results of 320 urine samples with those of high pressure liquid chromatography, enzyme-linked (Coti-Tracq EIA, Serex Inc., Maywood, NJ, USA), and fluorescence polarization immunoassay (TDX instrument, Abbott, Abbott Park, IL, USA) were r = 0.90, r = 0.69, r = 0.87, respectively, whereas the correlation coefficients between the assays other than particle counting ranged from 0.62 to 0.88. PaC does not require any separation step and can thus be easily automated.

journal_name

Clin Chem Lab Med

authors

Galanti LM,Dell'Omo J,Vanbeckbergen D,Dubois P,Masson PL,Cambiaso CL

doi

10.1515/CCLM.1999.112

keywords:

subject

Has Abstract

pub_date

1999-07-01 00:00:00

pages

729-34

issue

7

eissn

1434-6621

issn

1437-4331

journal_volume

37

pub_type

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