海洋沉积物孔隙水中阴阳离子含量的离子色谱法分析方法

葛璐; 杨涛; 杨競红; 蒋少涌

海洋沉积物孔隙水中阴阳离子含量的离子色谱法分析方法

葛璐^1,2,
杨涛^1,2,
杨競红^1,2,3,
蒋少涌^1,2

1 南京大学地球科学系成矿作用国家重点实验室, 南京 210093;
2 南京大学海洋地球化学研究中心, 南京 210093;
3 南京大学海岸与海岛开发教育部重点实验室, 南京 210093

基金项目:

国家高新技术研究开发计划("863")天然气水合物探测技术课题(2003AA611020/02)

天然气水合物资源综合评价及勘探开发战略研究项目(GZHZ200200203-04-02)

详细信息

作者简介:
葛璐(1982-),女,硕士,从事海洋地球化学研究,E-mail:shyjiang@nju.edu.cn

中图分类号: P736.4
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- 文章访问数: 1768
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出版历程
- 收稿日期: 2006-01-07
- 修回日期: 2006-05-31

ION CHROMATOGRAM METHOD FOR ANALYZING ANIONS AND CATIONS IN PORE WATER FROM MARINE SEDIMENTS

1 State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China;
2 Center for Marine Geochemistry Research, Nanjing University, Nanjing 210093, China;
3 Ministry of Education Key Laboratory for Coastal and Island Development, Nanjing University, Nanjing 210093, China

摘要

摘要: 分别采用Metrosep A Supp4-250型阴离子柱和Metrosep C 2-150型阳离子柱,以1.8 mmol/L Na₂CO₃+1.7 mmol/L NaHCO₃和4 mmol/L酒石酸+0.75 mmol/L吡啶二羧酸为阴阳离子淋洗液,用离子色谱仪来测定海洋沉积物孔隙水中阴离子Cl^-、Br^-和SO₄^2-浓度和阳离子Na⁺、NH₄⁺、K⁺、Ca²⁺、Mg²⁺的浓度。特别是针对高Cl^-和高Na⁺背景下Br^-和NH₄⁺的测定做了专门分析,得到了较理想的结果,建立了一套离子色谱法测定海洋沉积物孔隙水中常见的阴阳离子含量的实验方法。
- 离子色谱 /
- 孔隙水 /
- 阴阳离子 /
- 天然气水合物
Abstract: We use ion chromatogram technique to determine the anion and cation ion concentrations in pore waters. Metrosep A Supp4-250 type column and 1.8 mmol/L Na₂CO₃+1.7 mmol/L NaHCO₃mixed solution in anion system are used to determine concentrations of Cl^-,Br^-and SO₄^2- in pore water, and Metrosep C 2-150 type column and 4 mmol/L tartaric acid+0.75 mmol/L C₇H₅NO₄ mixed solution in cation system are used to determine concentrations of Na⁺,NH₄⁺,K⁺,Ca²⁺and Mg²⁺.The results indicate that correlation coefficient between measured and standard values for each ion in standard solutions preponderates over 0.999. The detection limit is less than 0.5 mg/L, and the relative standard deviation is better than 3%. In particular, we carried out special experiment to measure Br^-concentration under high Cl^- concentration background as well as NH₄⁺concentration under high Na⁺ concentration background. Right now, a tentative ion chromatograph method for analyzing concentrations of cations and anions in pore water from marine sediments has been established in our lab. This method has been proved to be rapid, simple, sensitive, and accurate.
- ion chromatograph /
- pore water /
- cation /
- anion

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参考文献(14)

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