孔隙水中硫酸根和甲烷的拉曼定量分析可行性研究  

Feasibility Study on in situ Raman Spectroscopy Quantitative Analysis of Methane and Sulfate in Marine Sediment Pore Water

作　　者：田陟贤[1,2] 张鑫[1] 刘昌龄[3] 孟庆国[3] 栾振东[1] 阎军[1] 

机构地区：[1]中国科学院海洋研究所,中国科学院海洋地质与环境重点实验室,山东青岛266071 [2]中国科学院大学,北京100049 [3]青岛海洋地质研究所,山东青岛266071

出　　处：《环境科学与技术》2014年第7期162-166,共5页Environmental Science & Technology

基　　金：国家自然科学基金项目(41006059);中国科学院战略性先导科技专项(XDA11040301);天然气水合物专项资助

摘　　要：海洋沉积物孔隙水是研究海洋环境、地质与生物地球化学问题的重要信息载体,传统岸上分析手段难以获得高保真的孔隙水地球化学参数。拉曼光谱作为一种非侵入、非破坏、同时也是无试剂消耗的测试技术,可在极端环境下进行固体、液体、气体分子原位识别,使其成为海底地球化学分析的有力工具。该研究针对孔隙水中的重要地化成分——SO42-、CH4的拉曼光谱定量分析可行性进行了实验室研究,结果显示,基于内标定法的拉曼光谱定量分析技术可以用于SO42-、CH4水溶液浓度的定量分析,并具有良好的精度和较低的检出限,可以用于原位定量分析海洋沉积物孔隙水中的甲烷与硫酸根浓度。为获取海洋沉积物孔隙水的高保真数据提供了新的技术参考。Pore water in marine sediment is important for the study of global environment change, marine geology and biogeochemistry. It is difficult for traditional analysis methods to obtain high-fidelity geochemical data of pore water. Laser Raman spectroscopy which is non-invasive and non-destructive and well suited to extreme environments is capable of in situ molecular identification of solids, liquids and gases. Two important pore water geochemical compositions -- SO42- and CH4 were quantitative analyzed with Raman spectroscopy. Results showed that the Rarnan spectroscopy quantitative techniques based on internal standard method can be used for quantitative analysis of SO^- and CH~ in aqueous solution with good accuracy and low detecting limit. The study provides new technical reference for obtaining high-fidelity information of marine sediment pore water composition.

关 键 词：孔隙水 甲烷 硫酸根 拉曼光谱 原位 定量分析 

分 类 号：X145[环境科学与工程—环境科学]