Method for preapraing electrochemical sensor for rapidly and selectively measuring maleic hydrazide in crops

A selectivity and crop technology, applied in the direction of material electrochemical variables, etc., to achieve high sensitivity, low preparation cost, and good stability

Inactive Publication Date: 2014-08-20
JIANGXI SCI & TECH NORMAL UNIV
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Problems solved by technology

However, the detection of Yiyadan by electrochemical oxidation has not been reported, and the detection range, sensitivity, selectivity and stability of Yiyadan still need to be further improved

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  • Method for preapraing electrochemical sensor for rapidly and selectively measuring maleic hydrazide in crops
  • Method for preapraing electrochemical sensor for rapidly and selectively measuring maleic hydrazide in crops
  • Method for preapraing electrochemical sensor for rapidly and selectively measuring maleic hydrazide in crops

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Embodiment Construction

[0011] A method for preparing an electrochemical sensor for fast and selective determination of Yiyadan in crops, comprising the following steps:

[0012] 1. Preparation of electrolyte solution: Add 50mM carboxylated 3,4-ethylenedioxythiophene monomer into 1ml of deionized water containing 0.1M lithium perchlorate and sodium dodecylbenzenesulfonate, and ultrasonically configure the electrolyte solution .

[0013] 2. Electrosynthesis of carboxylated 3,4-ethylenedioxythiophene: using a three-electrode system, glassy carbon and platinum wire as the working electrode and auxiliary electrode, and Ag / AgCl as the reference electrode, at a potential of 0.95 V for 60 s Potentiostatic polymerization, one-step synthesis of polycarboxylated 3,4-ethylenedioxythiophene conductive polymer on the surface of the working electrode.

[0014] 3. Pretreatment of polycarboxylated 3,4-ethylenedioxythiophene electrode: After electrosynthesis of polycarboxylated 3,4-ethylenedioxythiophene conductive ...

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Abstract

The invention discloses a method for preapraing an electrochemical sensor for rapidly and selectively measuring maleic hydrazide in crops. The method comprises the following steps of: firstly, preparing a copper-modified carboxylation 3,4-ethylene dioxo thiophene composite electrode; and secondly, carrying out electrochemical maleic hydrazide detection in a phosphate buffer containing the maleic hydrazide by using the composite electrode, wherein the maleic hydrazide has good electrical catalysis response, so that efficient, sensitive and selective detection on the maleic hydrazide is realized; and the prepared composite electrode can be successfully used for detecting the content of the maleic hydrazide in crops such as potatoes, onions and cotton leaves. The electrochemical maleic hydrazide sensor prepared by the method has the advantages of low preparation cost, simple process, simplicity and convenience in operation, high sensitivity, strong selectivity and the like.

Description

technical field [0001] The invention belongs to the field of electrochemical sensors, and relates to a method for measuring the crop growth inhibitor Yiyadan, in particular to a method for preparing an electrochemical sensor for rapid and selective determination of Yiyadan in crops. Background technique [0002] Yiyadan, also known as 1,2-dihydro-3,6-pyridazinedione, maleic hydrazide, maleic hydrazide, and fresh greens, can be prepared by the reaction of maleic anhydride and hydrazine hydrate A synthetic growth inhibitor obtained, white crystal at room temperature, molecular weight 112.09, melting point 260°C, slightly soluble in water, ethanol, dimethylformamide, glacial acetic acid, solubility at 25°C: 0.6 in water , 0.1 in ethanol, 0.1 in xylene, 2.04 in acetone, 2.4 in dimethylformamide, also soluble in diethanolamine and triethanolamine, easily soluble in acetic acid, and its sodium, potassium and ammonium salts are easily soluble in water. In 1949, it was developed by...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01N27/26G01N27/30
Inventor徐景坤文阳平贺浩华夏红英李玉真汪小强赵峰
OwnerJIANGXI SCI & TECH NORMAL UNIV