【引用本文】 蓝高勇, 吴夏, 杨会, 等. 激光同位素光谱法测量水中氢氧同位素组成的实验室间比对研究[J]. 岩矿测试, 2017, 36(5): 460-467. doi: 10.15898/j.cnki.11-2131/td.201704060049
LAN Gao-yong, WU Xia, YANG Hui, et al. Inter-Laboratory Comparison of Analysis for Hydrogen and Oxygen Stable Isotope Ratios in Water Samples by Laser Absorption Spectroscopy[J]. Rock and Mineral Analysis, 2017, 36(5): 460-467. doi: 10.15898/j.cnki.11-2131/td.201704060049

激光同位素光谱法测量水中氢氧同位素组成的实验室间比对研究

国土资源部广西岩溶动力学重点实验室, 中国地质科学院岩溶地质研究所, 广西 桂林 541004

收稿日期: 2017-04-06  修回日期: 2017-07-11  接受日期: 2017-07-20

基金项目: 国土资源部公益性行业专项(21411075-03);国家自然科学基金资助项目(41501222);广西青年科学基金项目(2014GXNSFBA118227);中国地质科学院岩溶地质研究所基本科研业务费项目(2016003)

作者简介: 蓝高勇, 助理研究员, 从事同位素分析测试研究。E-mail:langaoyong@karst.ac.cn。

通讯作者: 王华, 高级工程师, 从事同位素分析测试研究。E-mail:wanghua1@163.com

Inter-Laboratory Comparison of Analysis for Hydrogen and Oxygen Stable Isotope Ratios in Water Samples by Laser Absorption Spectroscopy

Key Laboratory of Karst Dynamics, Ministry of Land and Resources & Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China

Corresponding author: WANG Hua, wanghua1@163.com

Received Date: 2017-04-06
Revised Date: 2017-07-11
Accepted Date: 2017-07-20

摘要:激光同位素光谱分析方法是近些年使用较广泛的一种便捷、快速的测试稳定同位素组成的技术,能同时分析出水中δD、δ18O同位素组成,因其操作简单,检测效率高,体积小,野外现场测试携带方便,迅速在环境、地质、生态和能源等领域得到广泛应用,但是该测试分析方法尚没有相应的国家标准,测试结果得不到有效的溯源,在使用过程中缺乏规范和统一。为此,本文通过在全国范围内12家实验室选取8个比对水样(δD值在-189.1‰~-0.4‰内,δ18O值在-24.52‰~0.32‰内),利用激光同位素光谱法测试比对D/H和18O/16O值,探讨激光同位素光谱仪分析水中δD、δ18O值的准确度和精密度。测试结果表明:各个协作实验室数据准确、稳定,方法的重复性和再现性良好;激光光谱法测定的δD精密度为0.4‰(1σ),δ18O精密度为0.05‰(1σ),与传统稳定同位素质谱的精度几乎一致,因此适用于常规水样中δD、δ18O测定,可以开展野外在线实时检测水中氢氧同位素组成。本研究为开展制定激光同位素光谱法测定环境液态水中δD、δ18O同位素组成标准方法的工作推广和应用提供了参考。

关键词: 激光同位素光谱法, 氢同位素, 氧同位素, 实验室比对, 环境水样

Inter-Laboratory Comparison of Analysis for Hydrogen and Oxygen Stable Isotope Ratios in Water Samples by Laser Absorption Spectroscopy

KEY WORDS: Laser Absorption Spectroscopy, hydrogen isotope, oxygen isotope, inter-laboratory comparison, environmental water sample

Highlights

· It is high precision for δD(0.4‰, 1σ) and δ18O(0.05‰,1σ) in water sample determined by Laser Absorption Spectroscopy.

· The repeatabil ity and reproducibility for measurement of δD and δ18O in water samples obtained from inter-laboratory analysis are excellent.

· The inter-laboratory analysis data provide a reference for the development the standard method of Laser Absorption Spectroscopy for measurement of δD and δ18O isotopes in environmental waters.

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激光同位素光谱法测量水中氢氧同位素组成的实验室间比对研究

蓝高勇, 吴夏, 杨会, 唐伟, 应启和, 王华