High sensitive optode for selective determination of Ni2+ based on the covalently immobilized thionine in agarose membrane

被引：26
作者：
Hashemi, Payman [1 ]
Hosseini, Mohammad [1 ]
Zargoosh, Kiomars [2 ]
Alizadeh, Kama [1 ]
机构：
[1] Lorestan Univ, Dept Chem, Khorramabad, Iran
[2] Tarbiat Modares Univ, Dept Chem, Tehran, Iran
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2011年 / 153卷 / 01期
关键词：
Optical membrane; Ni2+; Agarose membrane; Thionine; OPTICAL SENSOR; WATER SAMPLES; TRACE NICKEL; PRECONCENTRATION; ION; SPECTROMETRY; ADSORBENT;
D O I：
10.1016/j.snb.2010.09.068
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A novel Ni2+ optode was prepared by covalent immobilization of thionine, 3,7-diamine-5-phenothiazoniom thionineacetate, in a transparent agarose membrane. Influences of. various experimental parameters on Ni2+ sensing, including the reaction time, the solution pH and the concentration of reagents were investigated. Under the optimized conditions, a linear response was obtained for Ni2+ concentrations ranging from 1.00 x 10(-10) to 1.00 x 10(-7) mol l(-1) with an R-2 value of 0.9985. The detection limit (3 sigma) of the method for Ni2+ was 9.30 x 10(-11) mol l(-1). The influence of several potentially interfering ions such as Ag+, Hg2+, Cd2+, Zn2+, Pb2+, Cu2+, Mn2+, Co3+, Cr3+, Al3+ and Fe3+ on the determination of Ni2+ was studied and no significant interference was observed. The membrane showed a good durability and short response time with no evidence of reagent leaching. The membrane was successfully applied for the determination of Ni2+ in environmental water samples. (C) 2010 Elsevier B.V. All rights reserved.
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页码：24 / 28
页数：5
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