Rapid detection method of organophosphorus pesticide residues by microchannel based on scanning and colorimetric analysis

An organophosphorus and micro-channel technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of only qualitative detection, multiple false positive results, etc., to avoid the loss of white light energy, low cost, analysis and pesticide residue detection results accurate effect

Active Publication Date: 2016-01-13
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0007] The specific technical problem to be solved by the present invention is that the existing rapid detection methods for pesticide residues can only detect qualitatively, and there are many false positive results; using cameras, mobile phones, etc. to obtain detection pictures is easily interfered by external light sources, and using a scanner to obtain detection Images are usually limited to test samples of relatively thin thickness

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  • Rapid detection method of organophosphorus pesticide residues by microchannel based on scanning and colorimetric analysis
  • Rapid detection method of organophosphorus pesticide residues by microchannel based on scanning and colorimetric analysis
  • Rapid detection method of organophosphorus pesticide residues by microchannel based on scanning and colorimetric analysis

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Embodiment Construction

[0032] Specific implementation of the present invention, a microchannel based on scanning colorimetric analysis is used for the rapid detection method of organophosphorus pesticide residues. Taking the detection of malathion pesticide residues as an example, the specific implementation mode of the present invention is further described.

[0033] 1. Template design: Use CAXA software to design the dimensions of the transparent base layer, transparent channel layer, and transparent covering layer. The scanner used in the present invention is a ScanMakeri800Plus flatbed scanner, so the template design size does not exceed the scanning range of the scanner used. One of the templates is designed as follows: the size of the entire pesticide residue detection microchannel is 25mm×75mm, the thickness of the channel layer is 3mm, and there are 8 strip channels of 4mm×13mm inside. An equilateral triangle sample tank, both of which simultaneously form a transparent microchannel hole. Th...

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Abstract

The invention relates to a method for rapidly detecting organic phosphorus pesticide residues through a microchannel based on scanning and colorimetric analysis. The method comprises the following steps: preparing the organic phosphorus pesticide residue microchannel; adding a pesticide-residue rapidly-detecting reagent into the organic phosphorus pesticide residue microchannel; scanning to obtain the digital pictures for detecting the organic phosphorus pesticide residue microchannel; conducting colorimetrical analysis on the digital pictures of the microchannel for detecting organic phosphorus pesticide residues. Based on scanning and colorimetric analysis, the microchannel is used for rapidly detecting organic phosphorus pesticide residues. The microchannel has the advantages of multiple-flux detection, reusability and low cost, has high transparency, and greatly increases the precision of detection on organic phosphorus.

Description

technical field [0001] The invention relates to a rapid detection method for organophosphorus pesticide residues in fruits and vegetables, specifically a method for adding polycarbonate (PC) and polydimethylsiloxane (PDMS) to a detection solution for organophosphorus pesticide residues in fruits and vegetables In a multi-flux microchannel made of materials, the digital picture of pesticide residue detection is obtained by scanning, and finally the chromaticity value of the digital picture is analyzed to realize the analysis method of organophosphorus pesticide residue detection. Background technique [0002] Since the beginning of the 21st century, people have paid great attention to food safety issues, especially the pesticide residues in fruits and vegetables directly endanger people's health. Therefore, the Food and Agriculture Organization of the United Nations (FAO) and the World Health Organization (WHO) have put forward higher requirements for the detection of pestici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25
Inventor 李晓春孟雪娟崔彩娥于化忠
Owner TAIYUAN UNIV OF TECH
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