Method for analyzing electronic cigarette tar component through combination of dynamic pin capture and gas chromatography and mass spectrometry

Abstract

The invention discloses a method for analyzing an electronic cigarette tar component through combination of dynamic pin capture and gas chromatography and mass spectrometry. The method comprises inserting a dynamic capture pin connected with a circular purging apparatus into a head-space bottle, starting the circular purging apparatus, performing heating at 50 DEG C for 30 min, inserting the dynamic capture pin into a GC-MS injection port to perform desorption, and then performing GC-MS qualitative analysis. According to the method, a non-equilibrium continuous adsorption process is adopted, the sample enrichment efficiency can be greatly improved, and volatile components in a sample are extracted from the sample. The dynamic capture pin is used for capture, adsorption and sampling, and after desorption, the sample enters a detector for analysis. The method is suitable for sampling and analyzing a trace amount of an organic target component. The method allows the trace-amount componentto be enriched, and is high in sensitivity, wide in adsorption range, good in reproducibility and easy to operate. After adsorption, the trace-amount component can be sealed and stored. A by-productproduced in an adsorption process is less. The method is accurate in qualitative and quantitative analysis, simple to operate, and relatively long in life.

Description

technical field [0001] The invention relates to an analysis method combining a closed-loop dynamic trapping needle and a gas chromatography-mass spectrometer (GC-MS). Background technique [0002] Composed of solvents, nicotine and flavors and fragrances, electronic cigarette liquid is an important component of electronic cigarettes. The volatile aroma components in electronic cigarette liquid directly affect the quality and taste of electronic cigarettes. Therefore, the research on the volatile aroma components in e-cigarette liquid has attracted widespread attention. Traditional determination methods mainly include simultaneous distillation extraction (SDE), solid phase microextraction (SPME), solvent dilution and other methods. SDE has good reproducibility, but the extraction time is long, and by-products are easy to be produced at high temperature; SPME, as a passive sampling technology, can extract and enrich the main aroma components in e-liquid without solvent, but S...

AI Technical Summary

Problems solved by technology

SDE has good reproducibility, but the extraction time is long, and by-products are easy to be produced at high temperature; SPME, as a passive sampling technology, can extract and enrich the main aroma components in e-liquid without solvent, but SPME extracts fiber It is easy to be damaged, the coating is easy to peel off, and the cost is high. In addition, SPME is limited by a single coating, which has a discriminatory effect on the analyzed samples; due to the large solvent content of solvent dilution, the solvent and volatile components cannot be effectively separated and cannot be effectively detected.

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