Method for preparing electrochemical sensor for detecting parathion

An electrochemical and sensor technology, applied in the field of electrochemical sensor preparation, can solve the problems of poor detection accuracy and long detection time, and achieve the effect of accurate and rapid detection results

Inactive Publication Date: 2015-07-15
HUBEI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the status quo of electrochemical detection of residual pesticide parathion needs to be

Method used

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  • Method for preparing electrochemical sensor for detecting parathion
  • Method for preparing electrochemical sensor for detecting parathion
  • Method for preparing electrochemical sensor for detecting parathion

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A method for preparing an electrochemical sensor for detecting parathion, comprising the following steps:

[0021] (1) Preparation of nano-silica particles and nano-acetylene black mixed solution: select template molecules: CTAB, F127 and P123 to prepare the nano-silica particles, and use 1.0wt% of the nano-silica particles with a secondary Diluted with water, ultrasonicated for 1h to obtain a dispersion of 1.0wt% nano-silica particles, and the nano-acetylene black was added to the dispersion of nano-silica particles so that the concentration of the nano-acetylene black was 10mg / ml -1 , again ultrasonically mixed for 1 h to obtain the nano-silica particles and nano-acetylene black mixed solution;

[0022] (2) Preparation of nano-silica particles and nano-acetylene black composite electrode: apply 5 μL of the mixed solution of nano-silica particles and nano-acetylene black on the surface of a glassy carbon electrode, and dry it in an infrared drying oven for 5 hours to p...

Embodiment 2

[0025] A method for preparing an electrochemical sensor for detecting parathion, comprising the following steps:

[0026] (1) Preparation of nano-silica particles and nano-acetylene black mixed solution: select template molecules: CTAB, F127 and P123 to prepare the nano-silica particles, and use 1.0wt% of the nano-silica particles with a secondary Diluted with water, ultrasonicated for 1h to obtain a dispersion of 1.0wt% nano-silica particles, and the nano-acetylene black was added to the dispersion of nano-silica particles so that the concentration of the nano-acetylene black was 10mg / ml -1 , again ultrasonically mixed for 2h to obtain the nano-silica particles and nano-acetylene black mixed solution;

[0027] (2) Preparation of nano-silica particles and nano-acetylene black composite electrodes: 5 μL of the nano-silica particles and nano-acetylene black mixed liquid was drop-coated on the surface of the glassy carbon electrode, dried in an infrared drying oven for 8 hours, a...

Embodiment 3

[0030] A method for preparing an electrochemical sensor for detecting parathion, comprising the following steps:

[0031] (1) Preparation of nano-silica particles and nano-acetylene black mixed solution: select template molecules: CTAB, F127 and P123 to prepare the nano-silica particles, and use 1.0wt% of the nano-silica particles with a secondary Diluted with water, ultrasonicated for 1h to obtain a dispersion of 1.0wt% nano-silica particles, and the nano-acetylene black was added to the dispersion of nano-silica particles so that the concentration of the nano-acetylene black was 10mg / ml -1 , again ultrasonically mixed for 3h to obtain the nano-silica particles and nano-acetylene black mixed solution;

[0032] (2) Preparation of nano-silica particles and nano-acetylene black composite electrodes: apply 5 μL of the mixed liquid of nano-silica particles and nano-acetylene black onto the surface of a glassy carbon electrode, and dry it in an infrared drying oven for 12 hours to ...

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Abstract

The invention discloses a method for preparing an electrochemical sensor for detecting parathion, belonging to the field of electrochemical sensors. The method comprises the following steps: diluting 1.0wt% of nano silicon dioxide particles by using secondary water, performing ultrasonic treatment for an hour, thereby obtaining dispersion of the 1.0wt% of nano silicon dioxide particles; adding nano acetylene black into the dispersion of the 1.0wt% of nano silicon dioxide particles, so that the concentration of the nano acetylene black is 10mg/ml<-1>; uniformly performing ultrasonic mixing, thereby obtaining mixed solution of the nano silicon dioxide particles and nano acetylene black; dispensing 5uL of the mixed solution of the nano silicon dioxide particles and nano acetylene black on the surface of a glassy carbon electrode, drying in an infrared drying box, thereby obtaining a composite electrode modified by the nano silicon dioxide particles and nano acetylene black. According to the sensor prepared by the method, the detection result is rapid and the data is accurate when the parathion is detected, and the method has the advantages of simplicity, convenience, practicality, low price, high efficiency and sensitivity.

Description

technical field [0001] The invention belongs to the field of electrochemical sensors, in particular to a preparation method of an electrochemical sensor for detecting parathion. Background technique [0002] Pesticides are one of the most important means of production in the world's agricultural production activities. As an important factor in increasing agricultural production, pesticides play an important role in avoiding pests and diseases and reducing labor intensity. The use of pesticides has created huge economic and social benefits for people. However, with the continuous increase in the variety and usage of pesticides, pesticide residues have also brought serious threats to the ecological environment and human health. Pesticides can inhibit the activity of acetylcholinesterase in the blood and tissues after entering the human body, resulting in a large accumulation of neurotransmitter acetylcholine, leading to nerve paralysis. Although some pesticides have low acu...

Claims

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Application Information

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IPC IPC(8): G01N27/26
Inventor 黄文胜艾训儒胡卫兵谭远斌石震谭小红方敦史永红李群芳廖红华
Owner HUBEI UNIV FOR NATITIES
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