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A rapid detection method for pesticide residues in vegetables and fruits

A technology for vegetable, fruit and pesticide residues, applied in the measurement of color/spectral characteristics, etc., can solve the problems of low measurement accuracy, poor sensitivity, poor permeability, etc., and achieve high measurement accuracy, good sensitivity, and high detection efficiency. Effect

Active Publication Date: 2015-12-09
广东恒度检测科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this method uses filter paper samples, and the permeability is not good. Therefore, the sensitivity of this method is poor and the measurement accuracy is not high.

Method used

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  • A rapid detection method for pesticide residues in vegetables and fruits

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specific Embodiment 1

[0033] The rapid detection method of pesticide residues in vegetables and fruits of this embodiment, the flowchart is as follows figure 1 As shown, the method includes the following steps:

[0034] Step a, establish a detection model

[0035] a1. Sample preparation: mix the pesticide with distilled water;

[0036] a2. Collect spectral data: Obtain near-infrared transmission spectrum of pesticide aqueous solution;

[0037] a3. Establish a detection model: According to the ratio of pesticides to distilled water, and the corresponding near-infrared transmission spectrum of the corresponding pesticide aqueous solution, establish a spectrum and pesticide content detection model;

[0038] Step b. Detect the spectra of fruits and vegetables to be tested

[0039] b1. Sample preparation: Grind the fruits and vegetables to be tested, and dissolve 20ml of vegetable juice in 80ml of alcohol solution;

[0040] b2. Collect spectral data: Obtain the near-infrared transmission spectrum of the alcohol so...

specific Embodiment 2

[0044] The rapid detection method of pesticide residues in vegetables and fruits includes the following steps:

[0045] Step a, establish a detection model

[0046] a1. Sample preparation: mix the pesticide with distilled water;

[0047] a2. Collect spectral data: Obtain near-infrared transmission spectrum of pesticide aqueous solution;

[0048] a3. Establish a detection model: According to the ratio of pesticides to distilled water, and the corresponding near-infrared transmission spectrum of the corresponding pesticide aqueous solution, establish a spectrum and pesticide content detection model;

[0049] Step b. Detect the spectra of fruits and vegetables to be tested

[0050] b1. Sample preparation: Grind the fruits and vegetables to be tested, and dissolve 20ml of vegetable juice in 80ml of alcohol solution;

[0051] b2. Collect spectral data: Obtain the near-infrared transmission spectrum of the alcohol solution of vegetable fruit juice;

[0052] Step c. Determine the pesticide compos...

specific Embodiment 3

[0055] The method for rapid detection of pesticide residues in vegetables and fruits of this embodiment includes the following steps after step a is performed once:

[0056] Step b. Detect the spectra of fruits and vegetables to be tested

[0057] b1. Sample preparation: Grind the fruits and vegetables to be tested, and dissolve 20ml of vegetable juice in 80ml of alcohol solution;

[0058] b2. Collect spectral data: Obtain the near-infrared transmission spectrum of the alcohol solution of vegetable fruit juice;

[0059] Step c. Determine the pesticide composition and content in vegetables and fruits

[0060] Compare the near-infrared transmission spectrum of the vegetable fruit juice alcohol solution obtained in step b2 with the spectrum obtained in step a3 and the pesticide content detection model to obtain the pesticide composition and content.

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Abstract

The invention relates to a method for rapidly detecting pesticide residues in fruits and vegetables, belongs to the field of food safety detection, in particular to a method applied in detecting pesticide in fruits and vegetables. The method includes firstly establishing a detecting model, then detecting a spectrum of the fruits and vegetables to be detected, and finally determining ingredients and content in the fruits and vegetables. By the aid of the method, the type of the pesticide can be detected through the spectrum, and the content of the pesticide can be determined according to the strength of absorption; since detection of actual content of the pesticide is omitted, the content can be acquired by comparing with the detecting model, detecting efficiency is high; since distilled water and ethanol serve as solvents, permeability is high, sensitivity is fine, and detecting accuracy is high.

Description

Technical field [0001] A rapid detection method for pesticide residues in vegetables and fruits belongs to the field of food safety, and specifically relates to a method for pesticide detection in vegetables and fruits. Background technique [0002] Pesticides can be used to kill insects, fungi and other organisms that harm crop growth. The earliest pesticides used are DDT, BHC, etc., which can eliminate pests in large quantities. But they have good stability, can exist in the environment for a long time, and accumulate in animals, plants and human body, so they are eliminated. Later, organic phosphorus pesticides, such as dichlorvos, were used instead of the original pesticides. However, they are too toxic and cause great harm to humans and animals. In recent years, a batch of high-efficiency and low-toxic pesticides have appeared, and now people have found specific pesticides, namely hormone pesticides. [0003] However, no matter how advanced pesticides are, they belong to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25
Inventor 赵春城赵烟桥
Owner 广东恒度检测科技有限公司