节点文献

计时电位法测定江河底泥中微量汞

DETERMINATION OF TRACE MERCURY IN SEDIMENT BY CHRONOPOTENTIOMETRY

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 许宏鼎刘再新巢强国成祖民董德明

【Author】 Xu Hongding Liu Zaixin Chao Qiangguo Cheng Zhumin Dong Deming (Department of Chemistry, Jilin University)

【机构】 吉林大学化学系吉林大学化学系

【摘要】 <正> 汞的测定可采用冷原子吸收法,气相色谱法和阳极溶出伏安法等。应用电位溶出法也可进行汞的测定。本文在进行电位溶出时通过一恒定电流,考察了测定汞的条件,对吉林省第二松花江污染地段底泥中的汞进行了测定。本方法设备简单,不需专门仪器,重现性好,便于基层单位推广应用。

【Abstract】 Mercury(Ⅱ)was determined by the following procedure: the trace mer- cury was first deposited on the surface of glassy carbon electrode at-0, 95 V(vs SCE)during the preelectrolysis in a base solution containing IM HCl, lM KSCN and 3×10-5M CdCl2, and then stripped out with a constant current(1μA). There was a linear relationship between the transition time and the concentration of the mercury in the range of 0.01 to 14 ppm. The HgO and HgS in sediment were extracted into 1.25M HCl and 1.25M aqua regia respectively. The extract can be used to determine mercury directly by chronopotentiometry. The method has succeded in analysing of sediment samples taken from the second Songhua River with a relative standard deviation of 2.7% for samples containing parts per million of mercury.

  • 【文献出处】 分析化学 ,Chinese Journal of Analytical Chemistry , 编辑部邮箱 ,1985年04期
  • 【被引频次】2
  • 【下载频次】49
节点文献中: 

本文链接的文献网络图示:

本文的引文网络