Formaldehyde electrochemical detection system and working electrode preparation method as well as formaldehyde detection method

Abstract

The invention discloses a formaldehyde electrochemical detection system. According to the formaldehyde electrochemical detection system, one end of a first connection channel is communicated with a first container; one end of a second connection channel is communicated with a second container; the other end of the first connection channel is communicated with the other end of the second connection channel by an ion exchange membrane; a working electrode and a reference electrode are located in the first container; a counter electrode is located in the second container; a communication port of the working electrode is connected with a current positive electrode measuring control port of a signal conditioning circuit; the commutation port of the counter electrode is connected with a current negative electrode measuring control port of the signal conditioning circuit; the commutation port of the reference electrode is connected with an electric potential state stable port of the signal conditioning circuit; the signal output end of the signal conditioning circuit is connected with the signal input end of a signal processor. According to the formaldehyde electrochemical detection system, a good linear relation between an electrolytic current signal and the concentration of formaldehyde is used so that the formaldehyde electrochemical detection system can be used for fast detecting the content of the formaldehyde in foods; the trace formaldehyde in the foods can also be detected.

Description

technical field [0001] The invention relates to the technical field of formaldehyde detection, in particular to a formaldehyde electrochemical detection system, a working electrode preparation method and a formaldehyde detection method. Background technique [0002] With the continuous progress of the economy and society, the continuous development of economic globalization, and the diversification of people's diet culture, however, the safety performance of food directly affects the health of the people, so food safety issues have gradually become a hot issue in the world. However, food safety issues mainly It comes from food safety testing, so food safety testing is also a worldwide problem. Therefore, the governments of various countries have taken strong measures to ensure food safety. The domestic and international markets have increasingly stringent requirements for food quality and higher requirements for food safety testing technology. However, the detection methods...

AI Technical Summary

Problems solved by technology

Optical sensors are relatively expensive and bulky, and are not suitable for online real-time analysis, which limits their extensive use

Although the photobiochemical sensor has improved the selectivity, the sensor is unstable due to enzyme activity and other factors, and it lacks practicability, and the price of the general formaldehyde gas sensor is too high to be popularized.

Images