Plant volatile gas collecting device for solid phase micro-extraction

Abstract

The invention discloses a plant volatile gas collecting device for solid phase micro-extraction. The plant volatile gas collecting device structurally comprises a fixing base, a device cylinder, a motor structure, an air passage, a solid phase micro-extraction detection port, a solid phase micro-extraction device, a compressor, a vent, and a low-temperature control structure of the extraction device, wherein the device cylinder is perpendicularly connected to the left part on the upper end surface of the fixing base; the solid phase micro-extraction detection port is perpendicularly connectedto the uppermost part on the inner left surface of the device cylinder; the solid phase micro-extraction device perpendicularly penetrates through the right part of the inner cavity of the device cylinder, and is in contact connection with the vent; the low-temperature control structure of the extraction device is movably connected to the left part of the inner cavity of the device cylinder. According to the invention, certain constant-low temperature operation treatment can be performed on the solid phase micro-extraction device of equipment, so that the vapor pressure of a solute at the extraction solvent end can be lowered, to ensure that the absorption and storage capacities of extracted plant volatile gas can reach expected values, and guarantee the stability and the safety of volatile gas storage.

Description

technical field [0001] The invention relates to the technical field of manufacturing gas collection devices, in particular to a plant volatile gas collection device for solid-phase microextraction. Background technique [0002] The collection and detection of plant volatile substances is the premise of studying the relationship between the production of these substances and pathogens. Common extraction techniques for plant volatile substances include: solvent extraction, steam distillation extraction, adsorption extraction, etc. At present, the methods used to collect plant volatile gases by solid-phase microextraction include: taking a chopped part of the plant sample and placing it in a closed container for solid-phase microextraction, or placing the whole plant in a closed container for solid-phase microextraction. method of microextraction. For the former method, the growth of the plant is destroyed after the plant is chopped, and the chopped plant sample cannot fully ...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a plant volatile gas collection device for solid-phase microextraction, to solve the problem that the existing technology does not damage the environment during the collection operation of the plant volatile gas. The growth of plants, but the solid-phase microextraction device of the equipment cannot be operated at a certain constant temperature, which may cause the vapor pressure of the solute at the extraction solvent end to be too high, so that the absorption and storage capacity cannot meet expectations, so that the volatile gas cannot be guaranteed. Storage stability and safety issues

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