CONVERGENCE CHROMATOGRAPHY ANALYSIS METHOD FOR TOCOPHEROL ACETATE IN E-LIQUID

摘要

A convergence chromatography analysis method for tocopherol acetate in e-liquid, for use in detecting tocopherol acetate in e-liquid. Since the presence of tocopherol acetate in e-liquid may impair human health, the presence or absence of tocopherol acetate in e-liquid is required to be quickly detected during both e-liquid production and e-liquid inspection to implement quality control on the e-liquid. Compared with reported gas chromatography and liquid chromatography, the use of convergence chromatography analysis consumes a shorter time. Optimized chromatography conditions are: an HSS C18 SB chromatography column, 3% of ethanol and 97% of CO2 used as an elution solvent, a flow rate of 0.8 mL/min, and a back pressure of 2000 psi. In an experiment, a photodiode array (PDA) detector is used, and detection is completed within two minutes when analysis is performed under a wavelength of 220 nm; in addition, the mobile phase comprises 97% of CO2 and thus is safe and pollution-free to the environment. The analysis method is rapid and sensitive, and thus provides a method basis for security inspection of an electronic cigarette.