室内気中ニコチンを指標とする日常環境下の受動喫煙の実態

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  • Personal exposure to nicotine in daily life.

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The environmental nicotine concentration and the exposure level of nonsmokers to ambient nicotine was measured with a device to determine the amount of involuntary smoking occurring in the daily lives of nonsmokers. Nicotine samples were collected by drawing air through an acid-treated diatomite sampler tube, either by a portable or a personal sampler. Gas chromatography using a flame thermionic detector was used to measure nicotine after an internal standard was added. This study showed that room size, ventilation rate, and quantity of tobacco smoked during a given period of time strongly influence nicotine concentration in an indoor environment and that nicotine levels fluctuate widely from spot to spot and from time to time, even in respective space. The only way to control nicotine concentration in room air is to control smoking, when room size and ventilation rate are fixed in respective space. A clear difference was found between nicotine concentration in the smoking and nonsmoking seats of trains and airplanes. As for personal exposure to nicotine, it was clearly heavier for nonsmoking subjects living with a smoker in their family than subjects without the smoker. In one nonsmoking family, a woman and a six-year-old daughter were unable to escape from nicotine exposure from an unexpected source.<br>A question that remains to be answered is that of whether or not there is any correlation between concentration of nicotine as measured by the personal sampler and the physical and psychological response of respective individuals.

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