Latex agglutination immunoassay in the presence of hemoglobin

Chemistry: analytical and immunological testing – Involving an insoluble carrier for immobilizing immunochemicals – Carrier is organic

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422 61, 436 67, 436534, 436808, 436825, 436826, G01N 33546, G01N 3372

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active

048472093

ABSTRACT:
A latex agglutination immunoassay method for determining an analyte in a blood sample in which the pH of the reaction mixture is maintained at about 8.5 or greater in order to overcome nonspecific agglutination of latex particles by hemoglobin present in the sample. The method is particularly applicable to the determination of glycated hemoglobin, e.g., Hb Alc. In another embodiment, native hemoglobin (Ao) can be determined based on its ability to cause agglutination of latex particles suspended in an aqueous solution having a pH of about 8 or below.

REFERENCES:
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patent: 4600698 (1986-07-01), Toth
patent: 4629692 (1986-12-01), Dean
Gribnau et al, "Particle-Labelled Immunoassays: A Review", J. Chromatog. 376 (1986) 175-189.
Hechemy et al, "Latex Particle Assays in Laboratory Medicine. Part I", Lab. Management, 22 (1984) 27-40.
Hechemy et al, "Latex Particle Assays in Laboratory Medicine. Part II", Lab. Management , 22 (1984) 26, 29-35.
Masson et al, "Particle counting immunoassay- an overview", J. Pharm. Biomed. Anal., 5 (1987) 113-117.
Goldstein et al, "Glycated Hemoglobin: Methodologies and Clinical Applications", Clin. Chem., 32 (1986) B64-B70.

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