同位素质谱仪测定水中δ^2H和δ^18O值的检测方法研究  

Determination ofδ^2 H andδ^18 O values in water by element analyzer-isotope ratio mass spectrometer

作　　者：李会 靳静静 聂俊峰[1,2] 杨宝平[1,2] 徐毅[3] 丁瑞霞 Li Hui;Jin Jingjing;Nie Junfeng;Yang Baoping;Xu Yi;Ding Ruixia(College of Agronomy,Northwest A&F University,Key Laboratory of Crop Physiology and Ecology and Tillage in Northwestern Loess Plateau,Minister of Agriculture,Yangling 712100,China;Institute of Water-saving Agriculture Research in Chinese Arid Areas,Northwest A&F University,Engineering Laboratory of Crop Effectively Using Water,Yangling 712100,China;Element Trading(Shanghai)Co.,Ltd.,Shanghai 200000,China)

机构地区：[1]西北农林科技大学农学院,农业部西北黄土高原作物生理生态与耕作重点实验室,杨凌712100 [2]西北农林科技大学中国旱区节水农业研究院,旱区作物高效用水工程实验室,杨凌712100 [3]艾力蒙塔贸易(上海)有限公司,上海200000

出　　处：《分析仪器》2020年第6期106-110,共5页Analytical Instrumentation

摘　　要：为准确检测液态水中稳定性同位素δ^2 H和δ^18 O值,对元素分析仪-同位素比质谱仪联用技术(EAIRMS)测定水中稳定性氢氧同位素的方法进行了研究。结果表明,该方法对氢氧同位素标准水样测定精度良好,稳定性氢同位素的标准偏差小于为0.52‰,稳定性氧同位素的标准偏差小于0.09‰。氢氧同位素标准水样的δ^2 H和δ^18 O的测量值与标准值之间达到显著相关,R^2=1。测得水样样品的δ^2 H值范围为-26.06‰^-71.53‰,δ^18 O值范围为-2.84‰^-11.21‰。试验结果为研究不同类型水中稳定性氢氧同位素差异提供了可靠的技术支撑。The test results show that the method has good accuracy for determination of hydrogen and oxygen isotope standard water samples.The standard deviation of stable hydrogen isotope is less than0.52‰,and that of stable oxygen isotope is less than 0.09‰.The measured values ofδ^2H andδ^18 O in hydrogen and oxygen isotope standard water samples reach a significant correlation with the standard values,R^2=1.Theδ^2H values of the water samples range from-26.06‰to-71.53‰,and theδ^18 O values range from-2.84‰to-11.21‰.The test results provide a reliable technical support for studying the difference of stable hydrogen and oxygen isotopes in different types of water.

关 键 词：δ^2H和δ^18O值测定 元素分析仪-同位素比质谱仪联用技术 稳定性同位素 

分 类 号：X832[环境科学与工程—环境工程] O657.63[理学—分析化学]