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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,
Salicule™
saliva collection
and test devices.
 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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Blood, Urine, and Saliva
as Test Samples |
Usually, a
blood sample is tested to determine if a substance is present in one's body
system or to measure it's quantity in the system. Blood test results are
directly relevant to the physiological functions of the substances tested, such
as drugs and hormones. However, certain other body fluids such as urine and
saliva have been proven to be good alternatives for blood as a test sample.
Traces of almost all substances in the blood circulation are found in these
alternative body fluids. In many situations the quantity of a substance in urine
or saliva can be used to assess the quantity of the substance in blood.
Collection of these alternative body fluid samples is more convenient, less
invasive, and safer than taking blood samples.
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