Self-assembled monolayer modified gold electrodes for traces Cu(II) determination

被引：25
|
作者：
Profumo, A [1 ]
Merli, D [1 ]
Pesavento, M [1 ]
机构：
[1] Univ Pavia, Dept Gen Chem, I-27100 Pavia, Italy
来源：
ANALYTICA CHIMICA ACTA | 2006年 / 557卷 / 1-2期
关键词：
self-assembled monolayers; D; L-penicillamine SAM; thiodimethylglyoxime SAM; Cu determination; adsorptive stripping analysis;
D O I：
10.1016/j.aca.2005.10.037
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
D,L-Penicillamine and thiodimethylglyoxime (TDMG) self-assembled monolayers (SAMs) on gold electrode were prepared and characterized by electrochemical measurements. The two sensors exhibit sensitive and selective response to Cu(II), both forming 2:1 complexes, the first one in acetic buffer and the second one in ammonia buffer. Copper determination at trace level (LOQ 0.2 and 0.3 mu g/L for D,L-penicillamine and TDMG, respectively) is possible with both the electrodes as verified in tap, spring and sea water. The influence on copper determination of most common ions present in natural waters and of organic matter has been investigated. Accuracy was checked by recovery test on spiked samples. (c) 2005 Elsevier B.V. All rights reserved.
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页码：45 / 51
页数：7
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