Pretreatment device for pesticide residue detection

Abstract

The invention discloses a pretreatment device for pesticide residue detection. The pretreatment device comprises a container, a hollow shaft, an extraction disc and a loading disc. The extraction discand the loading disc are arranged in the container from bottom to top through the hollow shaft, a heating device is arranged at the bottom of the loading disc, and an ultrasonic generation device isarranged below the extraction disc; the extraction disc is provided with a plurality of first test tube hole seats, and extraction solvent interfaces and extraction liquid output interfaces which arein one-to-one correspondence with the first test tube hole seats; the loading disc is provided with a plurality of second test tube hole seats as well as extracting solution input interfaces, negativepressure interfaces and nitrogen / solvent interfaces which are in one-to-one correspondence with the second test tube hole seats; the extraction solvent interfaces are connected with an extraction solvent supply device, the extraction liquid output interfaces are connected with the extraction liquid input interfaces, the negative pressure interfaces are connected with a negative pressure extraction device, and the nitrogen / solvent interfaces are respectively connected with a nitrogen supply device and a constant volume solvent supply device. The device has the advantages that a large number ofsamples can be treated, labor and time are saved, and the working efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of detection of food and agricultural products, in particular to a pretreatment device for detection of pesticide residues. Background technique [0002] In the detection process of pesticide residues in food and agricultural products, the pretreatment process plays a key role. The separation and purification of target substances in food and agricultural products is the focus and difficulty in the rapid detection technology of pesticide residues. [0003] The steps of pre-treatment of pesticide residues are relatively cumbersome. According to national standards and industry standards, the pre-treatment process can be summarized as follows: Weigh an appropriate amount of uniform sample, then add extraction solvent to extract the target substance (ultrasonic oscillation operation), and then carry out supernatant Liquid separation, nitrogen blowing and near-drying are performed at constant volume. The process i...

AI Technical Summary

Problems solved by technology

But now there is no automatic device that can completely replace manual operations to complete the pre-treatment of large quantities of pesticide residues.

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