Profiling flavourings in strawberry-flavoured e-liquid using headspace-gas chromatography-mass spectrometry.

E-liquids typically contain nicotine and flavourings in a matrix of propylene glycol (PG) and vegetable glycerine (VG). Some nicotine-free e-liquids are flavouring only in the aerosol carrier with the option for users to add their own nicotine. It is only the nicotine that is monitored in terms of level, as specified by the manufacturers.

A simple approach to analysing trace metals in aerosols produced by e-cigarettes.

Electronic cigarettes are a relatively new alternative to cigarettes, which have been marketed as being safer for users than conventional cigarettes. However, they may still result in inhalation of potentially toxic or carcinogenic substances, including metals produced by the heating element. This study looked at the levels of trace metals being produced by different atomizers used in e-cigarettes using a sample introduction technique based on the collection of aerosols produced by e-cigarettes in nitric acid, using glass midget impingers.