青藏高原雪冰样品中低含量水溶金属离子分析方法对比研究  

Comparison of Several Methods for Determination of Low-content Water Soluble Metal Ions in Snow and Ice in Tibetan Plateau

作　　者：高少鹏 邬光剑[1] 徐柏青[1,2] 于正良 刘晓明 石燕云[1] GAO Shaopeng;WU Guangjian;XU Baiqing;YU Zhengliang;LIU Xiaoming;SHI Yanyun(Key Laboratory of Tibetan Environment Changes and Land Surface Processes,CAS,Beijing,100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Continental Collision and Plateau Uplift,CAS,Beijing,100101,China)

机构地区：[1]中国科学院青藏高原环境变化与地表过程重点实验室,北京100101 [2]中国科学院大学,北京100049 [3]中国科学院大陆碰撞与高原隆升重点实验室,北京100101

出　　处：《中国无机分析化学》2020年第2期28-33,共6页Chinese Journal of Inorganic Analytical Chemistry

基　　金：国家自然科学基金项目（41725001,41977397）;中国科学院前沿科学重点研究计划项目（QYZDJ-SSW-DQC037）

摘　　要：从采自青藏高原阿汝和古里雅冰川的两支冰芯中选取31个样品,分别用三种仪器对比分析K^+、Na^+、Ca^2+、Mg^2+四种水溶金属离子,寻求最佳分析方案。分析结果对比发现,电感耦合等离子体发射光谱(ICP-OES)法在K+测量中存在困难,而离子色谱(IC)法和电感耦合等离子体质谱(ICP-MS)法均能够满足要求,且分析结果具有高度的一致性,四种离子的相关系数(R2)均在0.97以上,且并未出现ICP-MS法比IC法测量值明显偏高的现象。因此,除IC法外,ICP-MS法也是检测青藏高原雪冰样品中水溶金属离子的有效手段,其测定速度更快,且可以同时进行微、痕量元素检测,适用于大批量冰芯样品的快速分析。In this study,31 samples were selected from two ice cores collected from Aru and Guriya glaciers in the TP,and four water-soluble metal ions,K^+,Na^+,Ca^2+and Mg^2+,were analyzed and compared with these three instruments to seek for the best analysis scheme.The results show that IC and ICP-MS can both meet the requirements except ICP-OES,especially in K+analysis.The results were highly consistent,with the correlation coefficients(R2)all above 0.97 and there is no evidence that the measured values from ICP-MS are higher than that from IC.Therefore,in addition to IC,ICP-MS is also an effective method to determine water-soluble metal ions in snow and ice samples from the TP.Meanwhile,the analysis speed of ICP-MS is much faster than IC,and micro and trace elements can also be determined at the same time,which means ICP-MS is very suitable for the rapid analysis of large quantities of ice core samples.

关 键 词：雪冰 水溶金属离子 分析方法 

分 类 号：O657[理学—分析化学]