Principal component analysis of volatile components in refill liquids for electronic cigarettes with different tastes
In this study the characterization of refill liquids for different electronic cigarettes with different tastes was compared. GC/MS and principal component analysis were employed to analyze the volatile components in refill liquids for five kinds of taste, which included Jasmine, Furongwang, Zhonghua, Li Qun and Yuxi. The results of GC/MS showed that the main component of the refill liquids included propylene glycol, glycerol and nicotine. Principal component analysis results showed that flavor components affecting the flavor type of the refill liquid can be grouped into four factors, namely jasmine flavor, fruit flavor, caramel flavor and rose flavor. The jasmine flavor factor has a larger impact on the Jasmine taste of refill liquids, and the fruity flavor factor has a larger impact on the Furongwang taste of refill liquids. Benzyl acetate and benzyl alcohol were the main aroma components affecting the Jasmine taste of refill liquids, phenol and ethyl maltol affected the Furongwang taste, indole affected the Zhonghua taste, 2,3,5,6-tetramethyl pyrazine, dihydro damascenone and benzene ethanol affected the Liqun taste, and phthalic acid-di(2-propylpentyl) ester and benzene ethanol affected the Yuxi taste. This study provided a theoretical support for the blending of refill liquids for electronic cigarettes.