Method for preparing electrochemical sensor for detecting parathion

Abstract

The invention discloses a method for preparing an electrochemical sensor for detecting parathion, belonging to the field of electrochemical sensors. The method comprises the following steps: diluting 1.0wt% of nano silicon dioxide particles by using secondary water, performing ultrasonic treatment for an hour, thereby obtaining dispersion of the 1.0wt% of nano silicon dioxide particles; adding nano acetylene black into the dispersion of the 1.0wt% of nano silicon dioxide particles, so that the concentration of the nano acetylene black is 10mg / ml<-1>; uniformly performing ultrasonic mixing, thereby obtaining mixed solution of the nano silicon dioxide particles and nano acetylene black; dispensing 5uL of the mixed solution of the nano silicon dioxide particles and nano acetylene black on the surface of a glassy carbon electrode, drying in an infrared drying box, thereby obtaining a composite electrode modified by the nano silicon dioxide particles and nano acetylene black. According to the sensor prepared by the method, the detection result is rapid and the data is accurate when the parathion is detected, and the method has the advantages of simplicity, convenience, practicality, low price, high efficiency and sensitivity.

Description

technical field [0001] The invention belongs to the field of electrochemical sensors, in particular to a preparation method of an electrochemical sensor for detecting parathion. Background technique [0002] Pesticides are one of the most important means of production in the world's agricultural production activities. As an important factor in increasing agricultural production, pesticides play an important role in avoiding pests and diseases and reducing labor intensity. The use of pesticides has created huge economic and social benefits for people. However, with the continuous increase in the variety and usage of pesticides, pesticide residues have also brought serious threats to the ecological environment and human health. Pesticides can inhibit the activity of acetylcholinesterase in the blood and tissues after entering the human body, resulting in a large accumulation of neurotransmitter acetylcholine, leading to nerve paralysis. Although some pesticides have low acu...

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Problems solved by technology

However, the status quo of electrochemical detection of residual pesticide parathion needs to be improved, and there are many problems, such as long detection time and poor detection accuracy.

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