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Electrochemical method for detecting parathion pesticides

A parathion, electrochemical technology, applied in the direction of material electrochemical variables, etc., can solve the problems of high purchase and use cost of chromatograph, high professional requirements of testing personnel, and difficulty in miniaturization, and achieve good chemical stability, Improved detection sensitivity and low cost

Active Publication Date: 2018-11-23
GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chromatography is a commonly used method for the determination of parathion at present. It has high sensitivity and accuracy. However, the high cost of purchasing and using chromatographs, cumbersome operations, high professional requirements for testing personnel, and difficulty in miniaturization limit its use in small Application in enterprise and on-site inspection

Method used

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  • Electrochemical method for detecting parathion pesticides
  • Electrochemical method for detecting parathion pesticides
  • Electrochemical method for detecting parathion pesticides

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Embodiment 1

[0026] An electrochemical method for detecting parathion pesticides, comprising the following steps:

[0027] (1) Preparation of PIL / ZIF-8CPE electrode, the operation steps include (a), (b), (c): (a) Synthesis of ZIF-8 material: 0.80g of zinc nitrate and 0.40g of 2-methyl Dissolve imidazole in 50mL of methanol respectively, mix rapidly, continue to stir rapidly for 2 hours, put the mixed solution in a stainless steel reaction kettle with a capacity of 200mL lined with polytetrafluoroethylene, seal it, put it in an oven at 100°C for 2 hours, and cool to At room temperature, centrifuge to remove the solid material in the lower layer, wash it twice with water and anhydrous methanol, and dry it in vacuum at 50°C for half a day to obtain the ZIF-8 material; (b) Preparation of carbon paste electrode: graphite powder and ZIF-8 material is mixed and ground evenly according to the mass ratio of 40:1, then add liquid paraffin in the amount of 1.0g of ground graphite powder and ZIF-8 mat...

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Abstract

The invention discloses an electrochemical method for detecting parathion pesticides. The method comprises the following operation steps of (1) preparing a PIL / ZIF-8CPE electrode; (2) preparing a standard solution; (3) drawing a standard curve, wherein the oxidation peak current value and a parathion standard solution in the concentration range being 5.0 to 700mumg / L have a good linear relationship, and the linear equation is ip=0.1616C+4.493; in the practical parathion detection process, the parathion standard solution is replaced into a sample to be tested; the oxidation peak current value measured at -0.208+ / -0.01V is substituted into the linear equation; the content of parathion in the sample to be tested is obtained through calculation. The method is simple; the cost is low; the sensitivity is high.

Description

technical field [0001] The invention relates to an electrochemical detection method, in particular to an electrochemical method for detecting parathion pesticide. Background technique [0002] Parathion is a broad-spectrum insecticide, which has a good effect on the pest control of fruits and vegetables, but at the same time it has strong toxicity and has a great harmful effect on the human body. It belongs to the 2B category of carcinogens Substances, belonging to one of the pesticides banned by the state order. However, the risk of its illegal use still exists. Therefore, it is of great practical significance to establish a simple, accurate and sensitive method for the determination of parathion content. [0003] At present, the detection methods of parathion mainly include chromatography, ultraviolet spectrophotometry, fluorescence spectrometry and electrochemical method. Chromatography is a commonly used method for the determination of parathion at present. It has high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48
CPCG01N27/48
Inventor 牙禹闫飞燕王静郑鹭飞韦良黄信龙王彦力谢丽萍蒋翠文李焘
Owner GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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