Serum vst price
Pat.#4,379,847) encompass virtually all calibrator formulations that are currently used in commercial immunoassay kits for the analysis of human and animal specimens. Such protein-based matrices (including gelatin-based matrices as in U.S. But, it is a costly procedure and is generally used only for removal of endogenous analyte present in extremely low concentrations.Ī second, but less optimal alternative would be the use of calibrator matrices containing either a heterologous animal sera or human or bovine albumin fractions, in appropriate buffer formulations. Affinity chromatography, in contract, selectively removes the analyte without significantly altering the matrix.
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However, some techniques utilized for removal of endogenous analytes (“striping”) frequently result in major alterations in the lipid and/or protein concentration and/or composition. These conditions are rarely attainable in practice due to the wide variability of normal and abnormal physiological specimen composition.Ī reasonable alternative would be a matrix which approximately matches the typical specimen composition, such as homologous human serum-based calibrators made from pooled analyte-free human serum for use in the assay of human serum specimens. The ideal calibrator solution or matrix would be one whose composition is fully defined and would exactly match the composition of the unknown specimen except for the unknown analyte concentration. Human or mammalian blood products, such as human serum or plasma have been generally accepted and widely used as matrices for calibrators and reference controls since the advent of immunoassay techniques in the late 1970’s (Yellow, 1969), Typically, two to eight calibrators are used in an immunoassay for the purpose of constructing a dose-response curve (standard curve) by means of which the signal responses of reference controls and unknown specimens can be calculated in terms of concentration or mass units of a given analyte. Other uses include: Testing materials for urine contamination Used for diaper and incontinence product development and, car seat protection.
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This product has been proven effective for use with drugs of abuse and pregnancy (HCG), eliminating the need for lyophilization while stabilizing the product at room temperature. Liquid, Protein-Free Serum Substitute For use in Manufacturing Clinical Chemistry and Immunological Standards and Controls.