摘要
人类头发中氢、氧稳定同位素比值(δ^2H、δ^18O)与其生活的地理位置具有相关性。为考察不同城市常住居民头发中δ^2H、δ^18O的差异性,本研究选择了西部的阿克苏和东部沿海的连云港、淮安3个城市常住居民的头发样本为研究对象,利用元素分析仪-稳定同位素比质谱仪(EA-IRMS)进行氢、氧稳定同位素比值检验,采用Bayes算法对检验结果进行判别分析。同时,采用波长扫描光腔衰荡光谱仪对3个城市的居民饮用水进行氢、氧稳定同位素比值检验,分析居民头发与其饮用水中氢、氧稳定同位素比值的相关性。结果表明:阿克苏与连云港、淮安的常住居民头发中氢、氧稳定同位素比值差异显著(P<0.05);连云港与淮安的差异不显著(P>0.05)。Bayes判别分析结果表明:阿克苏与连云港、淮安的检测结果能够实现较好的区分,而连云港与淮安的区分效果较差;利用δ^2H和δ^18O共同作为判别因子的判别准确率高于单独使用δ^18O或δ^2H。3个城市常住居民头发与其饮用水中氢、氧稳定同位素比值具有相关性(δ^2H:r=0.933;δ^18O:r=0.998)。
Stable isotope analysis has become one of the main trends in sourcing research.The isotopic ratios of carbon,hydrogen,oxygen,nitrogen,sulfur and other elements measured by isotope ratio mass spectrometry(IRMS)have been widely applied in geology,hydrology,agriculture,medical and environmental science.The stable isotope ratios of hydrogen and oxygen in atmospheric water vary significantly along geographical gradient.The differences in the stable isotope ratios of hydrogen and oxygen in water at different geographical locations can be reflected in human tissues,such as hair,nail,teeth,skeleton and so on,through biological metabolism.So the stable isotope ratios of hydrogen and oxygen in human hair(δ2H,δ18 O)are related to the geographical location of their living cities.In this paper,the differences ofδ2H andδ18 O of urban residents’hair living in 3 different cities,Aksu in the west and Lianyungang and Huai’an on the eastern coast in China were investigated.79 hair samples of the residents living in the same city for the past 8 months were collected from the three cities,and 41 samples of their drinking water were also collected.The stable isotope ratios of hydrogen and oxygen of hair samples were determined by elemental analyzer-stable isotope ratio mass spectrometer(EA-IRMS).The data was analyzed by the Bayesian algorithm.Meanwhile,the hydrogen and oxygen stable isotope ratios of the drinking water in the three cities were determined by wavelength-scanning cavity ring-down spectrometer.The correlation of the stable isotope ratio of hydrogen and oxygen between the hair and drinking water was analyzed.The results showed that the stable isotope ratios of hydrogen and oxygen of Aksu,another two cities urban residents’hair are significantly different(P<0.05),while there is no significant difference between Lianyungang and Huai’an urban residents’hair(P<0.05).The results of Bayes discriminant analysis also showed thatδ2H andδ18 O of hair between Aksu and Lianyungang,Huai’an residents can be better classified,while another two cities are less effective.The discriminative accuracy of usingδ2H andδ18 O as discriminant factors is higher than that of usingδ18 O orδ2H separately.The stable isotope ratio of hydrogen and oxygen of hair were correlated with their drinking water(δ2H:r=0.933;δ18 O:r=0.998).
作者
何亚
刘昌景
梅宏成
朱军
王继芬
高天奇
何欣龙
胡灿
郭洪玲
王萍
姜晓佳
权养科
王桂强
HE Ya;LIU Chang-jing;MEI Hong-cheng;ZHU Jun;WANG Ji-fen;GAO Tian-qi;HE Xin-long;HU Can;GUO Hong-ling;WANG Ping;JIANG Xiao-jia;QUAN Yang-ke;WANG Gui-qiang(Institute of Criminal Science and Technology,People’s Public Security University of China,Beijing 100038,China;Institute of Forensic Science,Ministry of Public Security,Beijing 100038,China;Center for Forensic Identification of Forest Police,Nanjing Forest Police College,Key Laboratory of State Forest and State Forestry Administration,Grassland Administration on Wildlife Evidence Technology,Nanjing 210023,China;Beijing Forestry University,Beijing 100083,China)
出处
《质谱学报》
EI
CAS
CSCD
北大核心
2019年第6期575-583,共9页
Journal of Chinese Mass Spectrometry Society
基金
国家重点研发计划课题(2017YFC0803803)
公安部技术研究计划项目(2016JSYJB10)
公安部物证鉴定中心基科费发展支撑类项目(2018JB002)
痕迹科学与技术公安部重点实验室开放课题(2016FMKFKT06)资助
关键词
氢、氧稳定同位素
头发
稳定同位素比质谱仪(IRMS)
饮用水
地理位置
hydrogen and oxygen stable isotope
hair
stable isotope ratio mass spectrometer(IRMS)
drinking water
geographical location
