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Products > Drug of Abuse Test > Urine Drug Abuse Test Device > COT Cotinine Test Cassette COT-U02B
Product name : COT Cotinine Test Cassette COT-U02B
Item : COT-U02B
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Details:

Details

Product Name 

Specimen 

Format 

Catalog No. 

Cut-off(ng/ml) 

Cassette width 

Certificate 

COT Cotinine Test 

Urine

Cassette 

COT-U02B

200

3.0mm

CE/FDA

COT-U02D

4.0mm

Note:Could be customized under your request

 

Specifications

  1. Specimen: Urine
  2. Cut-off: 200 ng/ml
  3. Reading time: 5 minutes
  4. Model No:COT-U02B
  5. Certification: CE/ ISO9001

Principle of COT Rapid Test Cassette

The COT Rapid Test Cassette (Urine) detects Cotinine through visual interpretation of color development on the device. Drug conjugates are immobilized on the test region of the membrane. During testing, the specimen reacts with antibodies conjugated to colored particles and precoated on the sample pad.  The mixture then migrates through the membrane by capillary action, and interacts with reagents on the membrane. If there are insufficient drug molecules in the specimen, the antibody-colored particle conjugate will bind to the drug conjugates, forming a colored band at the test region of the membrane. Therefore, a colored band appears in the test region when the urine is negative for the drug. If drug molecules are present in the urine above the cut-off concentration of the test, they compete with the immobilized drug conjugate on the test region for limited antibody binding sites. This will prevent attachment of the antibody-colored particle conjugate to the test region. Therefore, the absence of a colored band at the test region indicates a positive result. The appearance of a colored band at the control region serves as a procedural control, indicating that the proper volume of specimen has been added and membrane wicking has occurred.


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