Conventional and electronic cigarettes (e-cigarettes) have different smoking characteristics.


2011年01月31日(Mon) 17:33


Nicotine Tob Res. 2010 Sep;12(9):905-12. Epub 2010 Jul 19.

Conventional and electronic cigarettes (e-cigarettes) have different smoking characteristics.

Trtchounian A, Williams M, Talbot P.

Department of Cell Biology & Neuroscience, University of California, Riverside, CA 29521, USA.

INTRODUCTION: Electronic cigarettes or e-cigarettes are marketed as tobacco-free nicotine
delivery devices that have received little laboratory evaluation. In this study, the smoking
properties of conventional and e-cigarettes were compared by examining the vacuum required
to produce smoke (conventional cigarettes) or aerosol (e-cigarettes) and the density of
the smoke/aerosol over time.

METHODS: Vacuum was measured using a manometer coupled to a smoking machine. The density
of aerosol or smoke was measured spectrophotometrically. E-cigarettes were subjected to
smoke-out experiments in which vacuum and aerosol density were measured until each cartridge
was exhausted.

RESULTS: The vacuum required to smoke conventional cigarettes varied among the eight brands
tested. Lights and ultra-light brands required stronger vacuums to smoke than unfiltered
and regular filtered brands. Except for one brand, higher vacuums were required to smoke
e-cigarettes than conventional brands. Smoke/aerosol density was stable for conventional
brands and for e-cigarettes over the first 10 puffs; however, aerosol density of e-cigarettes
dropped during subsequent smoking, and higher vacuums were required to produce aerosol
as the puff number increased. While conventional cigarettes were uniform in their smoking
behavior within brands, vacuum and density varied within brands of e-cigarettes.

DISCUSSION: Generally, e-cigarettes required stronger vacuums (suction) to smoke than
conventional brands, and the effects of this on human health could be adverse. The amount
of aerosol produced by e-cigarettes decreased during smoking, which necessitated increasing
puff strength to produce aerosol. The decreased efficiency of aerosol production during
e-cigarette smoking makes dosing nonuniform over time and calls into question their usefulness
as nicotine delivery devices.

PMID: 20644205 [PubMed - indexed for MEDLINE]