PMID- 29048816 OWN - NLM STAT- MEDLINE DCOM- 20181109 LR - 20181109 IS - 1000-8713 (Print) IS - 1000-8713 (Linking) VI - 35 IP - 8 DP - 2017 Aug 8 TI - [Determination of nicotine and cotinine in urine by hydrophilic interaction chromatography-tandem mass spectrometry]. PG - 826-831 LID - 10.3724/SP.J.1123.2017.05019 [doi] AB - The analytical method of nicotine and cotinine in human urine with hydrophilic interaction chromatography-tandem mass spectrometry (HILIC-MS/MS) was established. After the urine sample containing nicotine-d(4) and cotinine-d(3) isotope internal standards being diluted with water, the filtrate was introduced into ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) for analysis. Separation was performed on an ACQUITY UPLC((R)) BEH HILIC column (50 mmx3.0 mm, 1.7 mu m), in which methanol and 0.1% (v/v) ammonia were used as the mobile phases with isocratic elution at 0.2 mL/min of flow rate. Positive ion scan mode was used for mass spectrometry measurement and calibration curves were plotted for quantification determination. A good linearity could be obtained in the range of 1.0-1000 mu g/L for nicotine and cotinine with the linear coefficients of 0.9949 and 0.9958, respectively. The limits of detection of nicotine and cotinine were 0.082 mu g/L and 0.077 mu g/L, and the limits of quantification were 0.27 mu g/L and 0.26 mu g/L, respectively. The recoveries of the spiked urine samples were 90.4%-103.5% and 93.0%-104.6%, and the relative standard deviations (RSDs) were 4.80%-6.21% and 4.22%-7.15% for nicotine and cotinine respectively. The established method was applied to the analyis of 200 urine samples. Based on the investigation information of the urine of the smoking people, the nicotine contents were 26.68-854.30 mu g/L, and the cotinine contents were 36.66-1191.18 mu g/L (n=86, M(nicotine)=76.00 mu g/L, M(cotinine)=83.52 mu g/L, M:median); of the nonsmoking people, the nicotine contents were 5.08-69.66 mu g/L, and the cotinine contents were 3.16-28.21 mu g/L (n=114, M(nicotine)=7.53 mu g/L, M(cotinine)=3.79 mu g/L). The method is simple, sensitive and rapid. It is suitable for batch analysis of nicotine and cotinine in urine, and it can meet the requirement of evaluating the human tobacco exposure. FAU - Li, Mingxin AU - Li M AD - Department of Laboratory Techonology and Science of Public Health, West China School of Public Health, Sichuan University, Chengdu 610041, China. FAU - Wang, Qian AU - Wang Q AD - Department of Laboratory Techonology and Science of Public Health, West China School of Public Health, Sichuan University, Chengdu 610041, China. FAU - Zhu, Jing AU - Zhu J AD - Department of Laboratory Techonology and Science of Public Health, West China School of Public Health, Sichuan University, Chengdu 610041, China. FAU - Ren, Lin AU - Ren L AD - Center for Disease Control and Prevention of Sichuan Province, Chengdu 610041, China. FAU - Yong, Li AU - Yong L AD - Center for Disease Control and Prevention of Sichuan Province, Chengdu 610041, China. FAU - Zou, Xiaoli AU - Zou X AD - Department of Laboratory Techonology and Science of Public Health, West China School of Public Health, Sichuan University, Chengdu 610041, China. zouxl_1113@163.com. LA - chi PT - Journal Article PL - China TA - Se Pu JT - Se pu = Chinese journal of chromatography JID - 9424804 RN - 6M3C89ZY6R (Nicotine) RN - K5161X06LL (Cotinine) SB - IM MH - Chromatography, High Pressure Liquid MH - Chromatography, Liquid MH - Cotinine/*urine MH - Humans MH - Hydrophobic and Hydrophilic Interactions MH - Nicotine/*urine MH - *Tandem Mass Spectrometry OTO - NOTNLM OT - cotinine OT - hydrophilic interaction chromatography-tandem mass spectrometry (HILIC-MS/MS) OT - isotope dilution OT - nicotine OT - urine EDAT- 2017/10/20 06:00 MHDA- 2018/11/10 06:00 CRDT- 2017/10/20 06:00 PHST- 2017/10/20 06:00 [entrez] PHST- 2017/10/20 06:00 [pubmed] PHST- 2018/11/10 06:00 [medline] AID - 10.3724/SP.J.1123.2017.05019 [doi] PST - ppublish SO - Se Pu. 2017 Aug 8;35(8):826-831. doi: 10.3724/SP.J.1123.2017.05019.