Electrically-driven solid phase micro-extraction method and device thereof

Abstract

The invention relates to an electrically-driven solid phase micro-extraction method and a device thereof. An integrated porous material prepared through treating an epoxy resin as a base material, diethylenetriamine as a curing agent and polyethylene glycol as a pore forming agent and utilizing an in-situ gradual polymerization process is adopted as a solid phase micro-extraction material, the form of the solid phase micro-extraction material to prepare a solid micro-extraction column is combined with a rotation-speed-adjustable motor, a stirring effect is realized through rotation, and simultaneously the solid phase micro-extraction material which is adopted as an electrical adsorption work electrode and a platinum wire electrode which is adopted as a counter electrode are combined with a high-voltage direct current power supply to realize an electric adsorption effect in order to complete the electrically-driven solid phase micro-extraction. The electrically-driven solid phase micro-extraction method combining the electric adsorption technology with the stirring technology effectively overcomes a disadvantage that magnetic stirring cannot be used in a small-volume solution and simultaneously reduces a disadvantage that the abrasion of a solid phase micro-extraction stirring bar is easy, so the service life can be prolonged; the integrated epoxy resin based porous polymer is treated as the adsorption material, so the extraction amount and the detection sensitivity are improved. The method has the advantages of simplicity, easy operation and high flexibility.

Description

technical field [0001] The invention relates to an electric-driven accelerated solid-phase microextraction method and a device thereof, which is a pre-enrichment separation technology for various analysis methods and belongs to the laboratory application category. Background technique [0002] Solid-phase micro-extraction (SPME), which integrates sampling, extraction, enrichment, separation, and sample injection, has become one of the important sample pretreatment techniques. Extraction, SPE) technology can significantly shorten the sample pretreatment time, thereby improving the analysis efficiency. For example, a complete SPE process often takes 30-60 minutes, while the SPME process can be reduced to 10-30 minutes. However, when faced with a large number of sample analysis tasks, especially compared to the large-scale instrumental measurement process that can be completed within minutes or even seconds, it is still of great significance to further shorten the time of SPME...

Images