| 海洋沉积物中孔隙水的氯同位素测量方法研究 |
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| 引用本文： | 李艳平,蒋少涌,杨涛,濮巍.海洋沉积物中孔隙水的氯同位素测量方法研究[J].高校地质学报,2006,12(3):388-391. |
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| 作者姓名： | 李艳平 蒋少涌 杨涛 濮巍 |
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| 作者单位： | 1.南京大学地球科学系内生金属矿床成矿机制研究国家重点实验室,南京210093；2.南京大学海洋地球化学研究中心,南京210093 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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天然气水合物探测技术项目
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国家自然科学基金 |
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| 摘 要： | 采用Ba型、H型和Cs型三步阳离子交换树脂法，对海洋沉积物中孔隙水的氯进行了分离和提纯。氯的回收率达99．6％，能满足氯同位素质谱测定的需要。氯同位素的测量采用基于Cs2Cl^＋离子的高精度正热电离质谱法，对ISL354NaCI标准物质的多次测量结果为”CI／”CI=0．319130±0．000029，对一个南海海底沉积物中孔隙水的多次测量结果为^37CI／^35CI=0．319144±0．000043，表明此方法的稳定性好，测量精度高，可用于海洋沉积物中孔隙水的氯同位素示踪研究
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| 关 键 词： | 氯 同位素测定 正热电离质谱法 海洋沉积物孔隙水 |
| 文章编号： | 1006-7493（2006）03-0388-04 |
| 收稿时间： | 2006-06-22 |
| 修稿时间： | 2006-06-26 |
Analytical Method of Chlorine Isotopic Composition in the Marine Sediment Porewaters |
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| LI Yan-ping,JIANG Shao-yong,YANG Tao,PU Wei.Analytical Method of Chlorine Isotopic Composition in the Marine Sediment Porewaters[J].Geological Journal of China Universities,2006,12(3):388-391. |
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| Authors: | LI Yan-ping JIANG Shao-yong YANG Tao PU Wei |
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| Institution: | 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 |
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| Abstract: | A simple technique using three step cation-exchanges （Ba-type, H-type, and Cs-type）was used to enrich and purify CI from the sediment porewater samples. The recovery of CI is better than 99.6%. After purification, the ^37CI/^35CI ratios of porewater samples were measured using positive ion thermal ionization mass spectrometry based on the measurement of Cs2Cl^＋ ion with graphite load. The measured results for both the NaCI standard and one porewater sample show that the method has high stability and high precision （0.09 -0.13‰）. Initial results for porewater sampled from the South China Sea reveal significant -δ^37 Cl variation, and it may have great implications for further gas hydrate exploration in the area |
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| Keywords: | chlorine isotope ratio measurement positive ion thermal ionization mass spectrometry marine sediment porewater |
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