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Matches in SemOpenAlex for { <https://semopenalex.org/work/W2000398059> ?p ?o ?g. }

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• W2000398059 abstract "Exposure to secondhand tobacco smoke (SHS) has been linked to increased risk for a number of diseases, including lung cancer. The tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) is of particular interest due to its potency and its specificity in producing lung tumors in animals. The NNK metabolite 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) in urine is frequently used as a biomarker for exposure. Due to its long half-life (40-45 days), NNAL may provide a long-term, time-averaged measure of exposure. We developed a highly sensitive liquid chromatography-tandem mass spectrometry method for determination of NNAL in human urine. The method involves liquid-liquid extraction followed by conversion to the hexanoate ester derivative. This derivative facilitates separation from interfering urinary constituents by extraction and chromatography and enhances detection with electrospray ionization mass spectrometry. The lower limit of quantitation is 0.25 pg/mL for 5-mL urine specimens. Applications to studies of people with a range of different SHS exposure levels is described." @default.
• W2000398059 created "2016-06-24" @default.
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• W2000398059 date "2008-10-08" @default.
• W2000398059 modified "2023-10-16" @default.
• W2000398059 title "Subpicogram per Milliliter Determination of the Tobacco-Specific Carcinogen Metabolite 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanol in Human Urine Using Liquid Chromatography−Tandem Mass Spectrometry" @default.
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• W2000398059 doi "https://doi.org/10.1021/ac8009005" @default.
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