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Tobacco specific terms only

Vapour phase
This is the portion of smoke which passes through a Cambridge Filter Pad when a cigarette is smoked on a smoking machine. It includes permanent gases such as carbon monoxide, and volatile species such as acetaldehyde and benzene.

Vaping / Vaper
Using an e-cigarette is sometimes known as ‘vaping’, and the user as a ‘vaper’ (analogous to ‘smoking’ and ‘smoker’).

Ventilation
Ventilation is defined as the amount of air which enters the cigarette by means other than through the lit end of the cigarette. Ventilation is normally measured and expressed as a percentage of the total volume drawn through the unlit cigarette. Tobacco rod ventilation refers to the air entering through the cigarette paper and filter/tip ventilation refers to the amount of air entering through the tipping/plugwrap combination. Filter ventilation is an important cigarette design tool that contributes to an overall reduction in measured vapour and particulate phase yields of lower ISO yield products.

WG9 Intense smoking regime
An intense machine smoking regime recommended by ISO/TC126 Working Group 9 as an alternative to the established ISO puffing parameters. It uses a 60 cm3 puff volume, 30 second puff interval, 2 second puff duration and 50% ventilation blocking.

Yield-in-use
An estimate of the amount of smoke constituents taken into the mouth by a smoker (e.g. human smoker yield). When estimated by filter analysis it can also be referred to as human smoker yield, mouth level exposure, or in some applications tar in use.

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