Determinations of immunoglobulins G, A, and M in the Technicon RA-1000. 1985

R H Ng, and M Altaffer, and B E Statland

We evaluated the Technicon RA-1000 "Random Access" analyzer for the measurements of immunoglobulins G, A, and M in serum by turbidimetry. For various concentrations of serum pools the total CV ranged from 3.0 to 4.5% for IgG, from 3.1 to 3.2% for IgA, and from 4.8 to 5.4% for IgM. The linearity of the standard curves was good in the clinically useful ranges. Results for patients' samples correlated well with those determined with the Beckman Auto ICS (rate nephelometric method). Normal reference intervals (based on data for 200 healthy blood donors) are 7.67 to 16.87 g/L for IgG, 0.87 to 3.89 g/L for IgA, and 0.61 to 2.70 g/L for IgM. The RA-1000 requires only 8 microL for all three tests and can analyze 25 specimens for all three proteins in 37 min. Compared with other methods for immunoglobulin assays, the RA-1000 has higher throughput and offers significant savings in labor and reagent costs.

UI MeSH Term Description Entries
D007070 Immunoglobulin A Represents 15-20% of the human serum immunoglobulins, mostly as the 4-chain polymer in humans or dimer in other mammals. Secretory IgA (IMMUNOGLOBULIN A, SECRETORY) is the main immunoglobulin in secretions. IgA,IgA Antibody,IgA1,IgA2,Antibody, IgA
D007074 Immunoglobulin G The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B. Gamma Globulin, 7S,IgG,IgG Antibody,Allerglobuline,IgG(T),IgG1,IgG2,IgG2A,IgG2B,IgG3,IgG4,Immunoglobulin GT,Polyglobin,7S Gamma Globulin,Antibody, IgG,GT, Immunoglobulin
D007075 Immunoglobulin M A class of immunoglobulin bearing mu chains (IMMUNOGLOBULIN MU-CHAINS). IgM can fix COMPLEMENT. The name comes from its high molecular weight and originally was called a macroglobulin. Gamma Globulin, 19S,IgM,IgM Antibody,IgM1,IgM2,19S Gamma Globulin,Antibody, IgM
D007120 Immunochemistry Field of chemistry that pertains to immunological phenomena and the study of chemical reactions related to antigen stimulation of tissues. It includes physicochemical interactions between antigens and antibodies.
D007136 Immunoglobulins Multi-subunit proteins which function in IMMUNITY. They are produced by B LYMPHOCYTES from the IMMUNOGLOBULIN GENES. They are comprised of two heavy (IMMUNOGLOBULIN HEAVY CHAINS) and two light chains (IMMUNOGLOBULIN LIGHT CHAINS) with additional ancillary polypeptide chains depending on their isoforms. The variety of isoforms include monomeric or polymeric forms, and transmembrane forms (B-CELL ANTIGEN RECEPTORS) or secreted forms (ANTIBODIES). They are divided by the amino acid sequence of their heavy chains into five classes (IMMUNOGLOBULIN A; IMMUNOGLOBULIN D; IMMUNOGLOBULIN E; IMMUNOGLOBULIN G; IMMUNOGLOBULIN M) and various subclasses. Globulins, Immune,Immune Globulin,Immune Globulins,Immunoglobulin,Globulin, Immune
D009391 Nephelometry and Turbidimetry Chemical analysis based on the phenomenon whereby light, passing through a medium with dispersed particles of a different refractive index from that of the medium, is attenuated in intensity by scattering. In turbidimetry, the intensity of light transmitted through the medium, the unscattered light, is measured. In nephelometry, the intensity of the scattered light is measured, usually, but not necessarily, at right angles to the incident light beam. Turbidimetry,Nephelometry,Turbidimetry and Nephelometry
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001322 Autoanalysis Method of analyzing chemicals using automation. Autoanalyses

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