New smoking machine approach for cigarette smoking under intense and ISO 3308 conditions
ISO 3308 specifies the definitions and conditions for routine analytical smoking machines, defining the puffing regime as a 35 ml bell shape puff with a 2 s duration taken every 60 s. It also specifies two machine types “A” and “B” dependent on the adjustment of the termination device but misleadingly distinguished as “rotary machine” and “linear machine”. These were harmonised regarding their tar and CO deliveries in 1995 and 2002.
In 2007, on demand of the WHO, ISO TC 126 started the preparation of a more intensive smoking regime based on a 55 ml bell shape puff with a 2 s duration taken every 30 s and sealed ventilation holes.
In 2010 ISO TC 126 WG10 carried out a study to measure the tar, nicotine and carbon monoxide yields of cigarettes using both smoking regimes. The outcome of this study has shown significant differences in water and corresponding deliveries (TPM) with a trend to higher deliveries on linear machines. One possible explanation for this phenomenon was assumed to be the distance between the cigarette and the filter pad causing loss due to pre-condensation. The study also shows lower variation in the data gathered for rotary machines.
In consideration of this, a 4-channel hybrid machine was developed. It is tailored to the requirements of the new smoking method and combines the advantages of both machine types in an ideal and most efficient manner.
This poster briefly describes the design approach of the machine and discusses the first validation data for both smoking regimes compared to the yields delivered from standard linear and rotary smoking machines.