• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>international journal of environmental analytical chemistry >Supercritical Fluid Carbon Dioxide Extraction and Liquid Chromatographic Separation with Electrochemical Detection of Methylmercury from Biological Samples
【24h】

Supercritical Fluid Carbon Dioxide Extraction and Liquid Chromatographic Separation with Electrochemical Detection of Methylmercury from Biological Samples

机译：Supercritical Fluid Carbon Dioxide Extraction and Liquid Chromatographic Separation with Electrochemical Detection of Methylmercury from Biological Samples

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Using the coupled methods presented in this paper, methylmercury can be accurately and rapidly extracted from biological samples by modified supercritical fluid carbon dioxide and quantitated using liquid chromatography with reductive electrochemical detection. Supercritical fluid carbon dioxide modified with methanol effectively extracts underivatized methylmercury from certified reference materials Dorm-1 (dogfish muscle) and Dolt-2 (dogfish liver). Calcium chloride and water, with a ratio of 5:2 (by weight), provide the acid environment required for extracting methylmercury from sample matrices. Methylmercury chloride is separated from other organomercury chloride compounds using HPLC. The acidic eluent, containing 0.06 mol L#x2013;1NaCl, insures the presence of methylmercury chloride and facilitates the reduction of mercury on a glassy carbon electrode. If dual glassy carbon electrodes are used, a positive peak is observed at #x2013;0.65 to #x2013;0.70 V and a negative peak is observed at #x2013;0.90V with the organomercury compounds that were tested. The practical detection limit for methylmercury is 5 #xD7; 10#x2013;8mol L#x2013;1(1 #xD7; 10#x2013;12mol injected) when a 20 #x3BC;L injection loop is used.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号