PPX Propoxyphene Test Cassette （20 Pack）

Specifications

1. High sensitivity, simple, easy.

2. Accuracy: >99%.

3. CE & ISO approved.

4. Specimen: Urine.

5. Model No:PPX-U02D.

Principle of PPX Rapid Test Cassette

The PPX Rapid Test Cassette (Urine) detects Propoxyphene through visual interpretation of color development
on the strip. 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 ompete with the immobilized drug conjugate on the test region for limited
antibody binding sites. This will prevent  atachment 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.