不同城市居民头发中碳、氮稳定同位素比值特征研究  

Analysis on Carbon and Nitrogen Stable Isotope Ratios of Residents’Hair from Different Cities

作　　者：于子洋 梅宏成[2] 朱军[2] 杨瑞琴[1] 胡灿[2] 刘昌景[3] 郭洪玲[2] 王萍[2] 郑继利 权养科[2] 王桂强[2] YU Zi-yang;MEI Hong-cheng;ZHU Jun;YANG Rui-qin;HU Can;LIU Chang-jing;GUO Hong-ling;WANG Ping;ZHENG Ji-li;QUAN Yang-ke;WANG Gui-qiang(Peoples’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,State Forestry Administration,Nanjing Forest Police College,Nanjing 210023,China)

机构地区：[1]中国人民公安大学,北京100038 [2]公安部物证鉴定中心,北京100038 [3]南京森林警察学院,国家林业局森林公安司法鉴定中心,野生动植物物证技术国家林业和草原局重点实验室,江苏南京210023

出　　处：《质谱学报》2021年第6期1183-1192,共10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);现场物证溯源技术国家工程实验室开放课题(2019NELKFKT09)。

摘　　要：头发中蕴含了个体的饮食情况等信息,不同地区居民饮食习惯不同,其头发中碳(C)、氮(N)稳定同位素比值也具有一定的差异性。本研究采集了华中、华东、华南、西南和西北地区8个城市常住居民的头发样本,利用元素分析仪-稳定同位素比质谱(EA-IRMS)进行C、N稳定同位素比值检测。结果表明:部分城市间居民头发中C、N稳定同位素比值存在显著差异。居民头发δ13 C与人均蔬菜消费量呈显著负相关,居民头发δ15 N与人均肉类消费量呈显著正相关,鱼类的大量摄入可能会提高居民头发δ15 N值。男性和女性居民头发中C、N稳定同位素比值没有显著性差异,女性居民头发δ13 C与年龄呈较弱负相关。中国与其他国家居民头发中C、N稳定同位素比值存在差异,这主要是由不同国家居民的饮食习惯不同导致的。Stable isotope ratios of carbon,nitrogen,hydrogen and oxygen act as“nature’s recorder”.As a carrier for individual human information,human hair can be measured by isotope ratio mass spectrometry(IRMS)to translate into information about people’s dietary habits,health condition and life track.The basic principle behind establishing dietary lifestyle using isotopic profiles of human hair is the fact that the body’s only source of C,N is a person’s staple diet.It may have significant differences in carbon,nitrogen isotopic compositions of human hair that are living at different regions.The aim of the study was to analyze the discrepancy of 15 N and 13 C stable isotope ratios in human hair collected from different cities,and explore the relationship between carbon and nitrogen isotope ratios and human groups,such as gender and age.The carbon and nitrogen isotope ratios in the human hair of 247 local residents from 8 different cities were investigated by IRMS.The results showed that there were significant difference in carbon and nitrogen stable isotope ratios of human hair from different cities.The value ofδ13 C was negatively correlated with vegetable consumption per capita.The value ofδ15 N was positively correlated with meat consumption per capita,and might be increased by high intake of fish.The relationship betweenδ13 C,δ15 N and the factors of gender and age demonstrated that there were no significant difference between males and females,but the age of females showed a weakly negative correlation withδ13 C.By comparing the data of this paper and other literatures,the carbon and nitrogen stable isotopes in the hair of residents in China were different from other countries,which implied that there were various dietary habits in different countries.

关 键 词：人头发 C、N稳定同位素 比值特征 

分 类 号：O657.63[理学—分析化学]