Device for qualitatively, quantitatively and quickly detecting pesticide residue on site

Abstract

The invention provides a device for qualitatively, quantitatively and quickly detecting pesticide residue on site, which comprises a cavity with an air inlet, an air outlet and an air pump. The device is characterized in that: a dust filter communicated with the air inlet is arranged in the cavity, the dust filter is communicated with a suction type ion migration spectrum measurer in which a multi-pole plate is arranged, and the dust filter is also communicated with a photo-ionization detector in which an ultraviolet lamp, a polarization plate and a collector are arranged; the photo-ionization detector is communicated with a metal oxide semiconductor gas sensor; and the multi-pole plate of the suction type ion migration spectrum measurer, the collector of the photo-ionization detector, the signal pole of the metal oxide semiconductor gas sensor and the air pump are electrically connected with the central control processor. Pesticide residue sample gases on articles such as vegetables,melons and fruits and the like are sucked in a mode of 'smelling and sniffing'; pretreatment and sample preparation are not needed; the sucked gases of the detected article can be conveniently, quickly and accurately detected in real time to acquire components and concentration value of the detected article; quick, reliable and effective guarantee is provided for listed food safety; and in addition, trace gases of toxic and harmful substances can also be effectively and quickly detected.

Description

technical field [0001] The invention relates to a pesticide residue detection device, in particular to a device for rapid detection of pesticide residues qualitatively and quantitatively on site, belonging to the detection technical field. Background technique [0002] The invention and use of pesticides has undoubtedly greatly increased the yield of crops, but at the same time, accompanied by a large number of and irrational use of pesticides, it has brought negative effects that directly endanger human health due to the increase of pesticide residues in food. Especially in China, a country with a large population, due to restrictions on the production and use of pesticides, there are tens of thousands of acute pesticide poisoning incidents on average every year, which can be described as shocking. According to the 2010 March 15 investigation report released by the international "Greenpeace" environmental protection organization, among the 83 vegetable and fruit samples sam...

AI Technical Summary

Problems solved by technology

[0006] It is difficult for the existing laboratory pesticide residue analysis and detection to be directly used for on-site rapid detection; and although the conventional enzyme inhibition method can be used for on-site rapid detection, it can only detect organophosphorus and carbamate pesticides, and other types of pesticides At the same time, problems such as qualitative and quantitative detection results cannot be given. The present invention provides a method that uses the volatile gas or steam of pesticide residues as a medium, and can quickly and conveniently qualitative and quantitative on-site without pretreatment sample preparation. Device for real-time detection of pesticide residues

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