Summary
Nine mal smokers smoked three types of cigarettes that differed in mainstream nicotine. The experiment was carried out in three runs, each consisting of 7 d when smoking was allowed and 5 d when it was not allowed. Urine fractions were collected throughout the whole period of the experiments. As assumed, nicotine and four of its known metabolites, i.e., cotinine, nicotine-N′-oxide, nornicotine, and N-methyl-nicotinum ions were found in the urine. In addition, trans-3′- hydroxycotinine was determined. The amount of this metabolite was well in excess of those of nicotine and cotinine in the urine. The serum concentration trans-3′-hydroxycotinine was found to be second to serum cotinine.
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Neurath, G.B., Dünger, M., Orth, D. et al. Trans-3′-hydroxycotinine as a main metabolite in urine of smokers. Int Arch Occup Environ Health 59, 199–201 (1987). https://doi.org/10.1007/BF00378497
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DOI: https://doi.org/10.1007/BF00378497