COVID-19 IgM/IgG Rapid Test Kit (Dyed Microspheres)
This product is used for detection of COVID-19 IgG/IgM antibodies in samples by immunochromatographic dyed microspheres technique.
The test reagent contains:
Dyed microspheres-labeled recombinant COVID-19 antigens and dyed microspheres markers of quality control antibodies.
Cellulose membrane has two fixed testing lines (line G and line M) and one quality control line (line C). The test line G coated with mouse-anti-human-IgG antibodies is used to test COVID-19 IgG antibodies. The test line M coated with mouse-anti-human-IgM antibodies is used to test COVID-19 IgM antibodies. Quality control line (line C) is wrapped with rabbit IgG.
The dyed microspheres pad contains dyed microspheres -labeled goat-anti-rabbit IgG antibodies.
When testing, if the sample contains COVID-19 IgG antibodies, the antibodies in the sample will first react with recombinant COVID-19 antigens on the dyed microspheres pad to form an antibody-cdyed microspheres labeled antigen complex. When the NC membrane carries out the chromatography to the line G, it will form an antibody-antibody-dyed microsphere -labeled antigen complex with mouse-anti-human IgG antibodies and display color bands in the line G.
If the sample contains COVID-19 IgM antibodies, the antibodies in the sample will first react with recombinant COVID-19 antigens on the dyed microspheres pad to form an antibody-dyed microsphere labeled antigen complex. When the NC membrane carries out the chromatography to the line M, it will form an antibody-antibody-dyed microsphere-labeled antigen complex with mouse-anti-human IgM antibodies and display color bands in the line M. If there is no COVID-19 IgG/IgM antibody in the sample, the complex cannot be formed and no color bands appear in the line G and line M.
The dyed microspheres-labeled goat-anti-rabbit IgG antibodies bonded to the quality control line C coated with the rabbit IgG show color bands. Color bands shall appear in the line C when testing samples, otherwise the test is invalid.
Dyed Microspheres VS Colloidal Gold Method