| Immunoassay and Rapid Test Methods |
Acro Biotech's rapid test products are based on immunoassay, a type of assay method based on the binding reaction between antibodies and antigens. Usually, an analyte or a substance to be tested is an antigen. An antibody is a special molecule produced by human or animal immune cells. Well selected antibodies bind antigens with high specificity. For example, a cocaine antibody binds with cocaine molecule only, it does not cross-bind with morphine or other substances. Varied immunoassay products have been developed by combining detectable label technology and antibody-antigen binding properties.
Rapid test is a lateral flow type of immunoassay used in rapid drug test, or drug screen test. The immunoassay reagents are embedded at different sections of a porous test strip. When a liquid sample is introduced to a sample zone of the strip (usually at one end of the strip), the sample wicks towards the opposite end of the strip, which results in the sample solution mixes with the assay reagents and the analyte reacts with the reagents. At the end, a color band of the color labeled reagent will be present or absent at a  middle section of the assay strip, which indicates the presence or absence of the analyte in the sample solution.
Acro Biotech has developed a series innovative technologies for making more convenient, sensitive rapid test products including LabTube FOB Test, POC™ and CardLab urine test products, CupLab urine test products.
 CardLab is a fine test card about the size of a business card. It contains multiple test channels each contains specific test components for testing different drugs of abuse. A new version of CardLab, CardLab DipCard tests urine by dipping the card in the urine sample.
CupLab is a urine cup device that detects drugs of abuse while urine sample is collected in the device.
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