Pesticide residue detector and corresponding detection method

Abstract

The invention provides a pesticide residue detector which comprises a sample pretreatment module which comprises a sample rack and a weighing assembly located below the sample rack, wherein the samplerack is provided with a plurality of sample tube hole sites, and sample tubes are placed in the sample tube hole sites; a signal acquisition module which is used for carrying out spectrophotometric detection on the reaction cup; a needle module which is used for controlling the movement of the sample adding needle in the detector and the suction and discharge of the solution; the weighing assembly drives the weighing table to the bottom of each sample tube through the XY-direction sliding assembly to jack up the sample tubes so as to complete weighing. After the pesticide residue detector andthe detection method are adopted, automatic treatment and automatic sampling detection before detection of fruit and vegetable samples can be realized, the workload of detection personnel is reduced,the working efficiency is improved, and the pesticide residue detector and the detection method are particularly applied to rapid detection of food safety.

Description

technical field [0001] The invention relates to a pesticide residue detector and a corresponding detection method, which are mainly used in the field of rapid detection of food safety. Background technique [0002] In the detection process of the existing technical solution, the detection personnel are required to manually pre-process the samples to be tested outside the spectrophotometric detector, and then manually place the processed samples to be tested in the sample rack of the detector, and then start the detection According to whether the detector is an automatic instrument or a semi-automatic instrument, the sample liquid and reagents are added to the cuvette in turn according to the test process for reaction, and finally the spectrophotometric test result is obtained. Therefore, when there are many fruit and vegetable samples to be analyzed, the sample processing steps are time-consuming and labor-intensive and error-prone. [0003] According to the national standa...

AI Technical Summary

Problems solved by technology

However, this patent does not carry out the sample processing steps according to the national standard. The powder sample function in this patent will affect the accuracy of the test results, because onions, ginger, garlic, papaya, peppers, radishes, leeks, celery, coriander, wild rice, Mushrooms, tomatoes, pineapples and other vegetables and fruits contain plant secondary substances such as chlorophyll and anthocyanins that affect enzymes in their juices, which interfere with enzyme inhibitors and are prone to false positives, resulting in "false detection" of pesticide residue detection results ;In addition, each batch can only handle one sample detection, and it is impossible to efficiently detect multiple groups of samples at the same time, requiring multiple frequent operations, and the cross-contamination in the pipeline channel is more obvious, which is time-consuming and reduces the work efficiency of the testing personnel

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