FOOD SCIENCE ›› 2012, Vol. 33 ›› Issue (6): 54-58.doi: 10.7506/spkx1002-6630-201206012

• Processing Technology • Previous Articles     Next Articles

Preparation of Enzyme-Labeled Methamidophos for Application in Enzyme Thermal Sensor

Nguyen Van-luc,YU Jin-song,XU Fei*,HUA Ze-zhao   

  1. (Institute of Food Safety, University of Shanghai for Science and Technology, Shanghai 200093, China)
  • Online:2012-03-25 Published:2012-03-03

Abstract: The preparation of enzyme-labeled methamidophos was carried out by carbodiimide (EDC) method. Based on the effect on the remaining amount of methamidophos, the optimal ratio of methamidophos to succinic anhydride was determined to be 1:1.5 and the optimal reaction time 15 h. With increasing ratio between methamidophos derivatives and glucose oxidase, the coupling rate of enzyme-labeled methamidophos increased, while the enzyme activity decreased. Considering that enzyme-labeled pesticides need sufficient esterase inhibitory activity, the ratio of methamidophos derivatives to glucose oxidase was determined as 10:1.

Key words: methamidophos derivative, glucose oxidase (GOD), enzyme-labeled pesticides

CLC Number: