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An electrochemical sensor for glyphosate based on aminated mesoporous materials

A technology of aminated mesoporous and mesoporous materials, applied in the direction of material electrochemical variables, etc., can solve the problems of harsh conditions, cumbersome modification process of the sensing interface, etc., and achieve good stability, high practical value, and improved hydrophobicity

Inactive Publication Date: 2019-09-20
UNIV OF JINAN
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Problems solved by technology

In addition, electrochemical sensors have the disadvantages of cumbersome modification of the sensing interface and harsh conditions, so selecting appropriate electrode materials and simplifying experimental operations are very important issues in current analytical applications.

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  • An electrochemical sensor for glyphosate based on aminated mesoporous materials
  • An electrochemical sensor for glyphosate based on aminated mesoporous materials

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Embodiment 1

[0016] Example 1 Construction of glyphosate electrochemical sensor based on aminated mesoporous material

[0017] 1. Preparation of aminated mesoporous material carbon paste electrode, the specific steps are: first, NH 2 -Synthesis of SBA15: Weigh 3.943 g polyoxyethylene ether-polyoxypropylene ether-polyoxyethylene ether triblock polymer (M=5800) and dissolve it in 36 g deionized water, add 117.6 g 2 mol accurately / L of newly prepared HCl solution, stir the solution at 40°C until it becomes transparent, add 8.333 g tetraethyl orthosilicate dropwise, stir and crystallize at 40°C for 24 h, raise the temperature to 80°C, put it in an aging bottle for 48 h, and then use Wash twice with water and ethanol until the washing liquid is detected as neutral by pH test paper, then transfer to a vacuum oven for drying; the dried product is calcined in a box-type high-temperature resistance furnace at a rate of 1 °C / min to 550 °C for 6 h to obtain the product SBA -15 into a dry bottle for...

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Abstract

The invention discloses a glyphosate electrochemical sensor constructed on the basis of an aminated mesoporous material. A detection method comprises the following steps: an ordered mesoporous silicon(SBA15) material is synthesized firstly and subjected to amination modification, then a carbon paste electrode is prepared from NH2-SBA15, and by aid of electrochemical signals of amino groups and the principle of strong interaction between glyphosate and the amino groups, linear voltammetric scanning is performed and response current is recorded. The detection limit of the glyphosate pesticide detection method is 6.0*10<-13> mol / L, and the linear range is 1.0*10<-12>-1.0*10<-5> mol / L. According to the carbon paste electrode prepared from the functionalized mesoporous material, the electrodematerial is low in cost, the electrode is easy to renew, good in reproducibility, high in sensitivity and low in detection limit, and one simple and convenient method is provided for glyphosate detection.

Description

technical field [0001] The invention relates to the technical field of pesticide residue detection, in particular to the preparation of an electrochemical sensor and the detection of glyphosate pesticide. Background technique [0002] Glyphosate is a commonly used, broad-spectrum and high-efficiency herbicide. The use of glyphosate has brought great convenience to human beings. It not only reduces management costs, but also greatly increases the yield of glyphosate-resistant crops. At present, more and more studies have shown that glyphosate may cause certain impact or harm to living organisms during its use. For example, glyphosate will cause certain pollution to the soil, and it will further harm human beings through food and water quality. nervous and reproductive systems. Therefore, the upper limit of glyphosate has been added to GB5749-2006 "Hygienic Standards for Drinking Water". At present, many detection technologies for glyphosate have been researched, but most of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48
Inventor 陈培培周长利涂雪菲
Owner UNIV OF JINAN