摘要
考察了参考气信号强度、样品水体积和水平衡时间对水平衡氢、氧同位素组成分析的影响,建立了GasBench Ⅱ-IRMS连续流稳定同位素质谱仪、CO2-H2O平衡在线连续分析水样中氧同位素组成、疏水铂催化H2-H2O平衡在线连续分析水样中氢同位素组成的分析方法。分析实验室和标准水样,测量值在误差允许范围内与推荐值一致;实验室水标准氢同位素组成分析精度(1σ)为1‰,氧同位素组成分析精度(1σ)为0.1‰。方法能减少样品的损失,提高分析速度和稳定性。
Determination of hydrogen and oxygen isotope ratios in water samples by GasBench Ⅱ-IRMS using aqua equilibration technique was reported in this paper. Effects of sample volume, aqua equilibration time and signal intensity of reference gas on the determination of isotope ratios of hydrogen and oxygen were discussed. CO2 - H2O online equ/libration method for determination of oxygen isotope ratios and hydrophobic platinum catalytic H2 - H2O online equilibration method for determination of hydrogen isotope ratio by GasBench Ⅱ-IRMS were established. The methods have been applied to hydrogen and oxygen isotope ratio determination in standard water samples. The results are in agreement with certified values with precision of 1‰ （1σ） for both hydrogen and oxygen isotope ratio determination. The methods provide the advantages of good reliability, high efficiency and less sample loss.
出处
《岩矿测试》
CAS
CSCD
北大核心
2009年第1期1-4,共4页
Rock and Mineral Analysis
基金
国家自然科学基金项目资助(4077211940572101)
国土资源部百人计划项目资助
国家地质实验测试中心所长基金项目资助
国土资源部地质大调查项目资助(1212010816028)
