Colloid gold chromatographic test paper strip and preparation method thereof for fast detecting sibutramine
A technology for detecting test strips and sibutramine, which is applied in the detection field of biological immune methods, can solve the problems of application limitation of ELISA method, complicated operation process and the like, and achieves the effects of easy promotion, high sensitivity and cost saving.
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[0038] 2. Preparation of polyclonal antibody against sibutramine derivatives
[0039] Polyclonal antibody preparation: use M 2 - New Zealand white rabbits were immunized with BSA antigen, the immunization dose was 1mg / time, and multi-point subcutaneous injection was given on the back. For the first time, use M 2 -BSA antigen mixed with an equal amount of Freund's complete adjuvant (FCA), fully emulsified; 2 -BSA antigen mixed with an equal amount of Freund's incomplete adjuvant (FIA), fully emulsified, 3 weeks after the first immunization, 4-5 consecutive immunizations, each interval of 2-3 weeks, 10-15 days after the last immunization , measured by ELISA method and its fixed titer reached 10 5 At the above time, blood was collected and serum was separated and collected. IgG antibodies were extracted by saturated ammonium sulfate salting-out method, and frozen at -20°C for later use.
[0040] 3. Preparation of sibutramine derivative gold-labeled antibody and gold-labeled ...
Embodiment 1
[0044] Example 1: Spray the selected concentration of coating antigen and goat anti-rabbit IgG on the coating film as the test line (T) and control line (C) respectively, and dry in an oven at 37°C for 10 minutes. In the same way, a certain concentration of gold-labeled antibody was coated on the binding pad. The test strip is composed of a backing plate, on which a sample pad, a colloidal gold bonding pad, a coating film and a water-absorbing pad are glued in sequence. Cut the affixed board into 3mm wide strips, and then put the test strips together with the desiccant into an aluminum foil bag and seal them for storage.
[0045] Detection operation method: insert the sample end of the sibutramine colloidal gold chromatography test strip into the sample solution to be tested, the insertion depth does not exceed the marking line, take out the test strip for about 10-20 seconds, place it horizontally, and wait for 15 minutes Observe left and right to judge the test result.
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