中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (3): 86-88.

• 研究论文 • 上一篇    下一篇

两次双波长分光光度法测定铅和汞

张贵珠, 曲加新, 杨万龙, 何锡文, 史慧明   

  1. 南开大学化学系 天津 300071
  • 收稿日期:1993-04-20 修回日期:1993-09-18 出版日期:1994-06-10 发布日期:1994-06-10

Simultaneous Determination of Mercury and Lead by Twice Dual-Wavelength Spectrophotometric Method

Zhang Guizhu, Qu Jiaxin, Yang Wanlong, He Xiwen, Shi Huiming   

  1. Department of Chemistry, Nankai University, Tianjin 300071
  • Received:1993-04-20 Revised:1993-09-18 Published:1994-06-10 Online:1994-06-10

PDF

384

被引次数

8

摘要： 基于卟啉试剂TAPP与Pb2+、Hg2+在碱性介质中有灵敏的显色反应,建立了两次双波长分光光度法同时测定Pb、Hg的新方法,摩尔吸光系数分别为4.59×105和4.32×105mol-1·cm-1·L;可同时测定1:5～10:1范围内的Pb和Hg,用于水中Pb和Hg的同时测定,结果满意。

关键词: 两次双波长分光光度法, 铅, 汞

Abstract: A sensitive twice dual-wavelength spectrophoto-metric method has been developed for the simultaneous determination of trace Hg and Pb,based on the formation of colour complexes of the two metals with meso-tetra-(p-trimethylammonium phenyl)porphyrin in 0.02mol/L NaOH medium. The molar absorptivities are 4.59?105 and 4.32?105L·mol-1·cm-1 for Pb and Hg respectively. The method gave satisfactory restilts in simultaneous determination of Pb and Hg in the tap water.

Key words: twice dual-wavelength spectrophotometry, Hg, Pb

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