Method for detecting fungaltoxin by using quantum dot cation exchange signal amplification technology
A cation exchange and mycotoxin technology, applied in the field of bioengineering, can solve the problems affecting the uniformity and accuracy of the results, the limited detection sensitivity of the enzyme standard method, and the interference of sensitivity and stability, so as to shorten the detection time and improve the detection sensitivity and the effect of improving stability and sensitivity
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[0031] Example: Rapid detection of ochratoxin OTA using competitive ELISA
[0032] Taking Aspergillus ochrae OTA monoclonal antibody and quantum dots (carboxyl modified water-soluble quantum dots, composed of CdSe / ZnS, purchased from Wuhan Jiayuan Quantum Dot Technology Development Co., Ltd., catalog number Q2625) as examples, the explanation is based on quantum dot cation exchange Techniques for rapid detection of ochratoxin OTA:
[0033] (1) Coupling of quantum dots and ochratoxin A monoclonal antibody
[0034] Take the purified anti-ochratoxin A monoclonal antibody (mouse source, purified with saturated ammonium sulfate, the purity is more than 90%, the concentration is 1.5mg / ml, the solvent is 0.01M phosphate buffer PBS, pH=7.4). Take 50μl of carboxy-modified quantum dots with a concentration of 8μM and place them in a 2ml EP tube, then add 135μl of 10mM borate buffer and continue to mix, then add 200μl of the above purified anti-ochratoxin A monoclonal antibody and continue mix...
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