Department of Chemistry, Indian Institute of Technology, Roorkee 247 667, India.
Talanta. 2010 Sep 15;82(4):1136-42. doi: 10.1016/j.talanta.2010.06.021. Epub 2010 Jun 25.
A new terbium selective sensor based on N-(2-hydroxyphenyl)-3-(2-hydroxyphenylhydroxyphenylimino)-N-phenylbutanamidine (L(1)) and N,N'-bis((1H-indole-3-yl)methylene)butane-1,4 diamine (L(2)) as a ionophore is reported. Effect of various plasticizers; 2-nitrophenyloctylether (o-NPOE), dibutyl butylphosphonate (DBBP), chloronaphthelene (CN), dioctylphthalate (DOP) and tri-(2-ethylhexyl)phosphate (TEHP) with anion excluder, potassium tetrakis (p-chloropheny1)borate (KTpClPB) have been studied. The membrane with a composition of ionophore (L(1)):KTpClPB:PVC:o-NPOE (w/w, %) in ratio of 3.0:5.0:30.0:62.0 exhibited enhanced selectivity towards terbium ions (III) in the concentration range of 3.5 x 10(-7) to 1.0x10(-2)M with a detection limit of 1.2 x 10(-7)M and a Nernstian slope (20.0+/-0.5mVdec(-1) activity). The sensors showed the working pH range to be 3.5-7.5 with response time of 11s. The sensor has been found to work satisfactorily in partially non-aqueous media up to 15% (v/v) content of methanol, ethanol or acetonitrile and could be used for a period of 3 months. The selectivity coefficients indicated high selectivity for terbium (III). The fast and stable response, good reproducibility and long-term stability of the sensors were observed. The application of the sensor has been demonstrated in determination of terbium (III) ions in spiked water samples.
报道了一种基于 N-(2-羟基苯基)-3-(2-羟基苯基亚氨基)-N-苯基丁烷二胺（L(1)）和 N,N'-双((1H-吲哚-3-基)亚甲基)丁烷-1,4-二胺（L(2)）的新型铽选择性传感器，作为离子载体。研究了不同增塑剂；2-硝基苯辛醚（o-NPOE）、二丁基丁基膦酸酯（DBBP）、氯萘（CN）、邻苯二甲酸二辛酯（DOP）和三（2-乙基己基）磷酸酯（TEHP）与阴离子排斥剂，四（对氯苯基）硼酸钾（KTpClPB）对膜的影响。该膜的组成是离子载体（L(1)）：KTpClPB：PVC：o-NPOE（w/w，%）的比例为 3.0:5.0:30.0:62.0，在 3.5 x 10(-7)至 1.0x10(-2)M 的浓度范围内对铽离子（III）表现出增强的选择性，检测限为 1.2 x 10(-7)M，Nernst 斜率为 20.0+/-0.5mVdec(-1)活性。传感器的工作 pH 范围为 3.5-7.5，响应时间为 11s。该传感器在高达 15%（v/v）甲醇、乙醇或乙腈的部分非水介质中工作良好，可使用 3 个月。选择性系数表明对铽（III）具有高选择性。传感器具有快速、稳定的响应、良好的重现性和长期稳定性。该传感器已应用于测定加标水样中的铽（III）离子。
