Publication sur la corrélation entre le comportement des utilisateurs et la génération de produits de dégradation (en anglais)

Introduction

Electronic cigarette (EC) is a promising tool for a safer consumption of nicotine.  Although there is no combustion in EC and much less cancerogenic products in e-liquids than in tobacco cigarettes1, some  studies about vapor composition  found important levels of aldehydes2. Globally, studies about vapor composition are lacking of information (conditions of use, devices, e-liquid composition…). In order to prove that each information about the conditions of emission generation is important, we have studied the influence of puff duration, power, resistor surface and e-liquid composition on aldehydes and BTEX production (BTEX: Benzene, Toluene, ethyl-benzene, xylene).

Method

For the generation of emission, we used our vaping machine U-SAV, dedicated to vaping products3. Thanks to a cryogenic trap and an impinger with DNPH solution, we collected the vapor and made all required analysis for target molecules. We also analyzed the nicotine recuperation rate to ensure the correct running of the experiment. The following parameters have been fixed for all the experiments: flow (1.1L/min) and interpuff duration (60s).

Other parameters have been changed, one by one, to study their impact as follows:

  • Power (15/50/80 Watts)
  • Resistor surface : 2 different surfaces for one value : 0.5Ω
  • Puff duration : 4s/9s
  • E-liquid composition :
    • N° 1 : PG/VG (v/v) : 70/30, 1% of water, 1% of ethanol, 0.1% vanilline, 0.2% isoalamic alcohol, 0.1% acid methyl 2 butyrique, 10mg/mL of nicotine
    • N°2 : PG/VG (v/v) : 50/50, 2% de menthol, 6mg/mL of nicotine
Cette étude scientifique a été présentée par le Dr Hélène Lalo, directrice du pôle recherche du LFEL,  lors du Global Forum on Nicotine de Varsovie en juin 2017.
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