高等学校化学学报

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (9): 797.

• 论文 • 上一篇    下一篇

铅-邻菲罗啉络合吸附波的研究

曾泳淮   

  1. 北京师范大学化学系
  • 收稿日期:1986-07-19 出版日期:1987-09-24 发布日期:1987-09-24

Studies on Adsorptive Complex Wave of Lead -1,10-Phenanthroline

Zeng Yonghuai   

  1. Department of Chemistry, Beijing Normal University, Beijing
  • Received:1986-07-19 Online:1987-09-24 Published:1987-09-24

PDF (PC)

被引次数

24

摘要： 在0.06MHAc-0.14MNaAc(pH=5.1)和2×10-5M邻菲罗啉(phen)溶液中,用单扫示波极谱法可得到Pb(Ⅱ)-phen络合波,峰电位在-0.49V处。其导数峰高与铅在5×10-8-5×10-6M范围内的浓度有线性关系,最低检出限2.5×10-8M。此波可用于测定铅。研究确定该波为1:1铅-邻菲罗啉络合物的吸附波。

Abstract: In a supporting electrolyte containing 2×10-5Mphen, 0.06MHAc-0.14M NaAc and at pH5.1, we obtained an adsorptive complex wave of Lead-phen by Single-Sweep Polarography. It was found that the peak potential of the derivalivc wave is -0.49V (vs.SCE) and limit of detection for lead is 2.5×10-8M.We determined the composition of the complex which is 1:1 Pb(Ⅱ)-phen and confirmed that the wave is an adsorptive complex wave. The electrode processes may be presented as follow:Pb2++ phen⇔Pb(phen)2+ Pb(phen)2+⇔Pb(phen)2d2+ Pb(phen)2d2++2e+ Hg⇔Pb(Hg)+phen

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