高等学校化学学报

高等学校化学学报 ›› 1986, Vol. 7 ›› Issue (11): 982.

• 研究论文 • 上一篇    下一篇

2,7-TADN极谱特性研究(Ⅱ)-铜(Ⅱ)-2,7-TADN-乙二胺配合物吸附波测定痕量铜

张正奇, 杨霞, 于瑾, 俞汝勤   

  1. 湖南大学化学化工系
  • 收稿日期:1985-07-03 出版日期:1986-11-24 发布日期:1986-11-24

Studies on Polarographic Behavior of2,7-TADN (Ⅱ)-Polarographic Adsorptive Complex Wave of Copper -2,7-TADN-Ethylenediamine

Zhang Zhengqi, Yang Xia, Yu Jin, Yu Ruqin   

  1. Department of Chemistry & Chemical Engineering, Hunan University, Changsha
  • Received:1985-07-03 Online:1986-11-24 Published:1986-11-24

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摘要： 研究了Cu2+-2,7-TADN-乙二胺配合物的极谱行为。在氢氧化钠、乙二胺(en)和2,7-TADN底液(pH约为12)中,铜(Ⅱ)能产生Cu2+-2,7-TADN-en三元配合物吸附波,其峰电位为-0.86V。铜含量在2.0×10-8-5.0×10-6M范围内,峰高与铜浓度成线性关系。检测下限达1.0×10-8M。

Abstract: In a sodium hydroxide solution of pH12 containing ethylenediamine(en)and 1-(2-Thiazoiylazo)-2,7-Naphthalenediol(2,7-TADN)a sensitive adsorptive complex wave of Cu(2,7-TADN)(en)was observed by using single-sweep polarography.The peak potential is-0.86V,the peak hights being linearly proportional to copper concentration over a range of 2.0×10-8 to 5.0×10-6M.The determination limit is 1.0×10-8M.This method has been applied to determine trace amount of copper in ores and pure tin.In a sodium hydroxide solution of pH12 containing ethylenediamine(en)and 1-(2-Thiazoiylazo)-2,7-Naphthalenediol(2,7-TADN)a sensitive adsorptive complex wave of Cu(2,7-TADN)(en)was observed by using single-sweep polarography.The peak potential is-0.86V,the peak hights being linearly proportional to copper concentration over a range of 2.0×10-8 to 5.0×10-6M.The determination limit is 1.0×10-8M.This method has been applied to determine trace amount of copper in ores and pure tin.

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