Detection of Methyl Parathion Pesticide Residues Using an Electrochemical Biosensing System Based on Smartphones

In response to the problems of complex pre-treatment, time-consuming, bulky instruments, and unsuitable for on-site detection of traditional organophosphorus pesticide residue detection samples, the methyl parathion pesticide (MP) was used as the test object, a electrochemical detection system based on smart phone was constructed in this paper. The combination of reduced graphene oxide (rGO) and AuNPS was selected as signal amplifying element, and acetylcholinesterase (AChE) was used as biometric element to construct a highly sensitive screen printed sensor electrode (SPCE), and its electrode characteristics were characterized by electron microscopy and electrochemical methods.The electrochemical workstation and the portable organic phosphorus pesticide residue rapid detection device made in this article were used to test samples of the same concentration, and the comparison showed that the concentration error of the latter was less than 5%, which can meet the needs of organic phosphorus pesticide residue detection.