Faridbod Farnoush, Ganjali Mohammad Reza, Larijani Bagher, Norouzi Parviz, Riahi S, Mirnaghi F Fatemeh Sadat
Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran.
Endocrinology & Metabolism Research Center, Medical Sciences/ University of Tehran, Tehran, Iran.
Sensors (Basel). 2007 Dec 5;7(12):3119-3135. doi: 10.3390/s7123119.
N'-(2-hydroxy-1,2-diphenylethylidene)benzohydrazide (HDB) was found tohave a very selective and sensitive behavior towards erbium(III) ions, in comparison tothirteen lanthanide ions, inner transition and representative metal ions and was hence usedas a neutral ion carrier in construction of an Er(III) microelectrode. Theoretical calculationsand conductance studies of HDB to erbium and some other metal ions were carried out andconfirmed selectivity toward Er(III) ions.The best performance was obtained with a membrane contain 3% potassium tetrakis(p-chlorophenyl)borate (KTpClPB) as an anionic additive, 72% dibutyl phthalate (DBP) assolvent mediator, 5% HDB, and 20% poly(vinyl chloride) (PVC). The proposed Er(III)microelectrode exhibits a near Nernstian response of 17.5±0.5 mV per decade of erbiumactivity, and a very wide linear range 1.0×10-3.0×10 M. It can work well in the pHrange of 3.0-9.0. The lower detection limit (LDL) of the microelectrode was calculated tobe 2.0×10 M.
与13种镧系离子、内过渡金属离子和代表性金属离子相比，发现N'-(2-羟基-1,2-二苯基亚乙基)苯甲酰肼(HDB)对铒(III)离子具有非常选择性和灵敏的行为，因此被用作构建铒(III)微电极的中性离子载体。对HDB与铒及其他一些金属离子进行了理论计算和电导研究，证实了其对铒(III)离子的选择性。含3%四(对氯苯基)硼酸钾(KTpClPB)作为阴离子添加剂、72%邻苯二甲酸二丁酯(DBP)作为溶剂介质、5% HDB和20%聚氯乙烯(PVC)的膜表现出最佳性能。所提出的铒(III)微电极对铒活性每变化十年呈现出17.5±0.5 mV的近能斯特响应，线性范围非常宽，为1.0×10 - 3.0×10 M。它在3.0 - 9.0的pH范围内能很好地工作。计算得出该微电极的最低检测限(LDL)为2.0×10 M。
