Pesticide residue detection pretreatment device

Abstract

The invention relates to a pesticide residue detection pretreatment device, wherein a grass column device and a ground glass flask are arranged on a bracket table; the bottleneck of the ground glass flask is butted with ground glass interface at the lower end of the glass column device in a sealed manner; the glass column device is a hollow glass column tube and is provided with a vacuum pump connection opening which is connected to a vacuum pump; an inlet at the upper end of the glass column device are connected with a polytetrafluoroethylene helix interface; the upper end of the polytetrafluoroethylene helix interface is connected with a solid phase extraction column by a polytetrafluoroethylene control valve; the polytetrafluoroethylene helix interface includes a screw head and a hollow tube, the screw head is threadly connected with the inlet of the glass column device, the hollow tube is arranged in the inlet of the glass column device, the end of the hollow tube is connected to a stainless steel collecting pipe, and the stainless steel collecting pipe penetrates through the ground glass interface at the lower end of the glass column device and extends into the ground glass flask. The pesticide residue detection pretreatment device can treat a plurality of samples at the same time and meet demands for flow speed control and large-volume elution solutio.

Description

technical field [0001] The invention belongs to the technical field of food safety, and in particular relates to a pesticide residue detection pretreatment device, which is specifically applicable to a pesticide residue detection pretreatment device in plant source samples with any volume of eluent and which can control the flow rate of the eluent. Background technique [0002] my country is one of the first countries in the world to use pesticides to control crop pests. Due to its vast territory, complex geographical environment and climatic conditions, various crop varieties, and frequent occurrence of pests and weeds, these problems pose a serious threat to agricultural production. It has played an important role in protecting crops, preventing pests and diseases, improving the living environment of human beings, and controlling diseases. [0003] However, with the increase in the variety and dosage of pesticides, pesticide residues have become one of the important factors...

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Problems solved by technology

[0006] Existing commercial solid-phase extraction devices are expensive and are mainly suitable for detection methods with an elution volume of less than 10 mL, which is far from meeting the needs of daily detection of plant-derived samples, such as GB / T 5009.146-2008 and GB / T5009 .218-2008 SPE purification part requires 30mL eluent

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