The assay is based on the sandwich ELISA method, in which samples are added to ELISA plates coated with capture antibodies specific for the immunoglobulin. The captured immunoglobulin is detected by addition of a detection antibody conjugated to alkaline phosphatase (ALP). Addition of the chromogenic enzyme substrate p-nitrophenyl phosphate (pNPP) results in a colored product with an intensity directly proportional to the concentration of immunoglobulin in the sample. The concentration of the immunoglobulin is determined by comparison to a serial dilution of the immunoglobulin standard analyzed in parallel.
NOTE: This kit includes sufficient reagents for 6 x 96-well ELISA plates (Catalog #38019). ELISA plates and pNPP Substrate (Catalog #01917) are required for use with the Human IgA ELISA Antibody Pair Kit and are available for purchase separately.
- Human IgA Capture Antibody, 300 µL
- Human IgA ALP-Conjugated Detection Antibody, 80 µL
- Human IgA Standard, 1 vial
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Data and Publications
Representative Standard Curve
• Reportable Range: 0.1 - 100 ng/mL. This is the concentration range in which measurement of the analyte can be done with the highest precision, accuracy, and linearity.
• Accuracy: The analyte standard of this ELISA was calibrated against NIBSC international standard 67/086.