Preparation method and application of high-sensitivity nitrite reductase biological electrode

The invention discloses a preparation method and application of a high-sensitivity nitrite reductase biological electrode, and relates to the technical field of environmental pollution monitoring and food safety detection. Nitrate reductase purified and extracted from microbial cells is attached to the prepared composite electrode, so that the high-specificity nitrite reductase biological electrode is constructed, and accurate qualitative and high-sensitivity quantitative detection of nitrite can be realized. The method for detecting nitrite through the enzyme biological electrode solves the problems that a traditional detection method is complex in step, large in measurement error and the like, and has the advantages of being rapid in detection, high in sensitivity, high in anti-interference capacity and good in stability. The high-sensitivity nitrite reductase electrode constructed by the invention has great practical application value in the aspects of environmental monitoring of toxic nitrite and food saf