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Carbendazim detection method

A detection method, the technology of carbendazim, which is applied in the field of carbendazim detection, can solve the problems of narrow linear range and low sensitivity, and achieve the effect of cheap raw materials, good electrical conductivity, and improved electrocatalytic force

Active Publication Date: 2019-07-23
XINYANG NORMAL UNIVERSITY
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Problems solved by technology

However, most of the existing electrochemical methods for detecting carbendazim have the problems of low sensitivity and narrow linear range.

Method used

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Embodiment Construction

[0027] The technical solutions of the present invention will be described in further detail below through specific implementation methods.

[0028] A kind of carbendazim detection method, it comprises the following steps:

[0029] Pretreatment First, the glassy carbon electrode is ground on sandpaper, and then polished with 0.3 μm aluminum oxide powder until the surface of the glassy carbon electrode presents a mirror surface; then ultrasonically cleaned in twice distilled water for 2 to 3 minutes, taken out, and used Rinse with double distilled water and dry with filter paper to obtain a bare glassy carbon electrode; put the bare glassy carbon electrode into a solution containing 1.0×10 -3 K in mol / L 3 Fe(CN) 6 and 0.1mol / L KNO 3 In the mixed aqueous solution, in the three-electrode system, the cyclic voltammogram was measured under the condition of the scan rate of 0.1V / s and the potential range of -1.2~0.8V; then observe the voltammetry curve, if the two peaks If the di...

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Abstract

The invention provides a carbendazim detection method which comprises the following steps: depositing poly L-histidine on the surface of a glassy carbon electrode by adopting a cyclic voltammetry to prepare a poly L-histidine modified electrode; coating the surface of the poly L-histidine modified electrode with multi-walled carbon nano tube suspension and then drying to prepare a composite material-modified glassy carbon electrode; putting the composite material-modified glassy carbon electrode in a B-R buffering solution containing carbendazim and detecting the concentration of the carbendazim by adopting a differential pulse voltammetry under the conditions that the potential range is 0.9-1.6 V, and the scanning rate is 70-150 mV / s. The carbendazim detection method provided by the invention is high in detection sensitivity, wide in linear range and wide in application prospect.

Description

technical field [0001] The present invention relates, in particular, to a method for detecting carbendazim. Background technique [0002] Carbendazim (carbendazim, BCM) is a low toxicity and high efficiency fungicide. It has a control effect on diseases caused by fungi and is commonly used in the production process of crops. Carbendazim can penetrate into the interior of plants, is resistant to rain erosion, and has a long residual effect. Therefore, whether it is from the perspective of food safety or environmental protection, the detection of carbendazim residues is very important. [0003] At present, the detection methods of carbendazim mainly include fluorescence analysis, liquid-mass spectrometry, high performance liquid chromatography, gas chromatography, and ultraviolet spectrophotometry. However, most of these methods are cumbersome to operate and the instruments are expensive, while electrochemical methods have attracted much attention because of their simple in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 宋力许春萱荣宪举董高丽何永杨吉刘彩蝶
Owner XINYANG NORMAL UNIVERSITY
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