A highly selective optode for determination of Hg (II) by a modified immobilization of indigo carmine on a triacetylcellulose membrane

被引：18
作者：
Tavallali, Hossein [1 ]
Shaabanpur, Elham [1 ]
Vahdati, Parvin [1 ]
机构：
[1] Payame Noor Univ, Dept Chem, Tehran 193954697, Iran
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2012年 / 89卷
关键词：
Optode; Mercury; Indigo carmine; N-cetyl pyridinium chloride; KINETIC SPECTROPHOTOMETRIC DETERMINATION; OPTICAL SENSOR; MERCURY DETERMINATION; BULK OPTODE; 4-(2-PYRIDYLAZO)-RESORCINOL; FLUORESCENCE; EXTRACTION; DITHIZONE;
D O I：
10.1016/j.saa.2011.12.055
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
A new mercury optical sensor was designed with indigo carmine (IC) as a dye indicator. The water-soluble indicator was lipophilized in the form of an ion-pair with N-cetyl pyridinium chloride (CPC) and dissolved in methanol (70 degrees C), then immobilized on a triacetylcellulose membrane. This optode exhibits a linear range of 24.0-468.0 mu M of the Hg (II) ion concentration with detection limit of 7.2 mu M at 669.5 nm. Response time was within 8-10 min, depending on the Hg (II) ion concentration. The sensor could readily be regenerated with a hydrochloric acid solution (0.01 M) in a reversible manner and its response was reproducible (RSD = 3.2%). The method was applied to the determination of mercury content of a variety of samples which gave satisfactory results. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：216 / 221
页数：6
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