A device and method for detecting pesticide residues

Abstract

The invention relates to a device for detecting pesticide residue and a detection method. The device comprises a pesticide residue fast detection card, a power supply, a device main body, a temperature control assembly, a camera and a controller; the temperature control assembly and the camera are respectively used for heating at constant temperature and shooting according to the control of the controller. The detection method comprises the following steps: (1) respectively obtaining the reference image of extracting solution of the matter to be detected and the standard image of the extracting solution of the matter without pesticide residue by the device; (2) respectively calculating the tone, saturability and brightness corresponding to each pixel point in the reference image characteristic region and the standard image characteristic region; (3) having quantitative classification process on the corresponding tone, saturability and brightness to obtain the reference quantization series weight vector and the standard quantization series weight vector, calculating the degree of association between the reference quantization series weight vector and the standard quantization series weight vector; (4) obtaining the average degree of association, the average degree of association is more close to 1 and the pesticide residue is less. The operation process is simplified, and the pesticide residue is detected exactly and quickly.

Description

technical field [0001] The invention relates to a detection device, in particular to a device and a detection method for pesticide residue detection. Background technique [0002] As food safety issues have received more and more attention in China, the issue of pesticide residues in fruits and vegetables has also received great attention. Fruits and vegetables are mainly organic phosphorus and carbamates, two types of insecticide residues with large dosage and high toxicity. The national standard "GB / T 5009.199-2003 Quick Test Card Method for Rapid Detection of Organophosphorus and Amino Acid Lipid Pesticide Residues in Vegetables" formulates the enzyme test paper made of highly sensitive cholinesterase and chromogenic agent for pesticide residues The quick test card is a method for determining the residues of organophosphorus and aminomethyl esters in fruits and vegetables according to the inhibition rate of cholinesterase. This method is mainly based on comparing the co...

AI Technical Summary

Problems solved by technology

This method is mainly based on comparing the color of the pesticide residue quick test card with the blank card to judge whether it is blue (representing low esterase inhibition rate and very little pesticide residue), light blue (representing a small amount of pesticide residue) or white ( It represents high enzyme inhibition rate and extremely large pesticide residues). However, the current methods for judging the color of the pesticide residue quick test card mainly include: subjective judgment by artificial vision and chromatographic analysis. Among them, subjective judgment by artificial vision has a large error; and chromatographic analysis Although the accuracy of the judgment can be guaranteed, the operation process is complicated and the detection period is long.

Images