Determination of nickel by a new chromogenic azocalix[4]arene

被引:61
作者
Ma, QL [1 ]
Ma, HM [1 ]
Su, MH [1 ]
Wang, ZH [1 ]
Nie, LH [1 ]
Liang, SC [1 ]
机构
[1] Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
基金
中国国家自然科学基金;
关键词
chromoionophore; calixarene; nickel; spectrophotometry;
D O I
10.1016/S0003-2670(01)01009-1
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A novel azocalix[4]arene, 5,17-bis (quinolyl-8-azo)-25,26,27,28 -tetrahydroxycalix [4] arene 1, was prepared by linking 8-aminoquinoline to calix[4]arene through a diazo-coupling reaction. Based on it, a simple, sensitive and selective spectrophotometric method was developed for the determination of Ni2+. In basic media, Ni2+ formed a 1:1 complex with 1. Beer's law was obeyed in the range 1.7 x 10(-7)-5.1 x 10(-6) mol l(-1) of Ni2+. The apparent molar absorptivity (epsilon) of 1-Ni2+ complex was 1.28 x 10(5) 1mol(-1) cm(-1) at 580 nm, and the detection limit was 1.4 x 10(-7) mol l(-1) (S/N = 3). The relative standard deviation for measurement of 8.5 x 10(-7) mol l(-1) Ni2+ was 2.7% (n = 10). The proposed method was applied to the determination of trace amount of Ni2+ in certified samples with satisfactory results. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:73 / 79
页数:7
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