COVID test method has been developed and matured with the efforts of scientists. Our SARS-CoV-2 antigen test kit (Colloidal Gold Immunochromatography) is based on specific antibody-antigen reaction and immunoassay technology to qualitatively detect the coronavirus (2019-nCoV) antigen in clinical specimens. The specimens are nasal swabs, easy to get and the results can be got in fast and accurate.
We’d better understand the basic knowledge about COVID-19 before introduce the test kit.
The coronavirus, as a large virus family, is a single positive-stranded RNA virus with an envelope. The virus is known to cause serious illnesses, such as colds, Middle East Respiratory Syndrome (MERS), and Severe Acute Respiratory Syndrome (SARS). The core protein of SARS-CoV-2 is N protein (Nucleocapsid), which is a protein component located inside the virus. Relatively conservative in beta coronavirus And it is often used as a tool for diagnosing coronavirus. As the key receptor for SARS-CoV-2 to enter cells, ACE2 is of great significance to the study of viral infection mechanisms.
COVID Test Principle
The current test card is based on the specific antibody-antigen reaction and immune analysis technology.
The test card contains colloidal gold-labeled SARS-CoV-2 N protein monoclonal antibody which is pre-coated on the combination pad, matched SARS-CoV-2 N protein monoclonal antibody immobilized on the Test area (T) and corresponding antibody in the quality control area (C).
During testing, the N protein in the sample combines with the colloidal gold-labeled SARS-CoV-2 N protein monoclonal antibody which is pre-coated on the combination pad. The conjugates migrate upward under the capillary effect and subsequently captured by the N protein monoclonal antibody immobilized in the test area (T). The higher the contents of N protein in the sample, the more the conjugates capture and the darker the color in the test area is. If there is no virus in the sample or the virus content is lower than the detection limit, then there is no color demonstrated in the test area (T).
Regardless of the presence or absence of the virus in the sample, a purple stripe will appear in the quality control area (C). The purple stripe in the quality control area (C) is a criterion for the judgment of whether or not there is enough sample and whether or not the chromatography procedure is normal.
Step 1: Use the swab to collect the sample.
Step 2: Peel off the adhesive.
Step 3: Insert swab from well B to well A.
Add 6 drops of buffer to well A
Rotate the shaft, two rounds each direction.