An electrochemical method for detecting parathion pesticide

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: 2020-04-14
GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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  • Abstract
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  • 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

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  • An electrochemical method for detecting parathion pesticide
  • An electrochemical method for detecting parathion pesticide
  • An electrochemical method for detecting parathion pesticide

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Embodiment 1

[0026] An electrochemical method for detecting parathion pesticides includes 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 zinc nitrate and 0.40g 2-methyl The imidazole was dissolved in 50 mL of methanol, mixed quickly, and continuously stirred for 2 hours. The mixture was placed in a stainless steel reactor with a capacity of 200 mL lined with polytetrafluoroethylene. After sealing, it was placed in a 100 ℃ oven to react for 2 hours, and then cooled to Centrifuge the lower solid material at room temperature, wash it twice with water and anhydrous methanol, and dry it under vacuum at 50°C for half a day to obtain ZIF-8 material; (b) Preparation of carbon paste electrode: Combine graphite powder with the one synthesized in step (a) The ZIF-8 material is mixed at a mass ratio of 40:1 and ground evenly, then add liquid paraffin at the amount of 1.0g of the ground graphite pow...

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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 pesticides. Background technique [0002] Parathion is a broad-spectrum insecticide, which has a good effect on pest control of fruits and vegetables, but at the same time it has strong toxicity and has great harm to human body. It belongs to category 2B carcinogen Substances are one of the pesticides prohibited by national orders. However, the risk of illegal use still exists. For this reason, 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 spectroscopy and electrochemistry. Chromatography is a commonly used method for the determination of parathion. It has high sensitivity and accuracy. However, the high cost of pu...

Claims

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Application Information

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Patent Type & Authority Patents(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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