Cold extraction device for commercial solid-phase microextraction probe

Abstract

The invention discloses a cold extraction device for a commercial solid-phase microextraction probe. A copper pipe is inserted into a polytetrafluoroethylene threaded cap at the upper part of a headspace bottle; the copper pipe is communicated with the inner cavity of the headspace bottle; the headspace bottle is arranged in a heater and is used for heating a solid sample in the headspace bottle;the outer side wall of the copper pipe at the upper part of the headspace bottle is connected with an electro-thermal refrigeration sheet; the electro-thermal refrigeration sheet is connected with a temperature control device, so that the temperature control device can be used for controlling the temperature of the electro-thermal refrigeration sheet; and the commercial solid-phase microextractionprobe penetrates through the threaded copper cap at the upper part of the copper pipe and then extends to the middle of the inner cavity of the copper pipe so as to perform headspace extraction. Compared with a cold-coating solid-phase micro-extraction device researched at the present stage, the cold extraction device has the advantages of structural simplicity, simplicity and easiness in extraction operation and easiness in the implementation of commercialization.

Description

technical field [0001] The invention belongs to the technical field of headspace solid-phase microextraction, and in particular relates to a cold extraction device for a commercial solid-phase microextraction probe. Background technique [0002] Analysis of organic matter in solid samples Sample pretreatment mainly uses organic solvents to extract samples using Soxhlet extraction, ultrasonic extraction and other techniques, then concentrates the extract by rotary evaporation, and concentrates to the required volume of milliliters / microliters by nitrogen blowing, and finally Perform chromatography / mass spectrometry. This conventional sample pretreatment technology has cumbersome steps, which increases the sample analysis time and reduces the analysis efficiency, and the use of a large amount of organic solvents will also cause secondary pollution to the environment, which is inconsistent with the development trend of green analysis. [0003] Solid-phase microextraction techn...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a cold extraction device for commercial solid-phase microextraction probes with simple operation and easy assembly, which is suitable for the direct solvent-free extraction of volatile or semi-volatile substances in solid samples. Extraction, which effectively solves the problems in the application of cold coating solid phase microextraction technology

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