Gupta V K, Agarwal S
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
Talanta. 2005 Feb 15;65(3):730-4. doi: 10.1016/j.talanta.2004.07.043.
PVC based membranes of 5,10,15,20-tetrakis(4-methoxyphenyl)porphyrinatocobalt(II) (TMOPP-Co) (I) as electroactive material with dibutyl butyl phosphonate (DBBP), dioctyl phthalate (DOP), 1-chloronaphthalene (CN), tri-n-butyl phosphate (TBP) and tris(2-ethylhexyl) phosphate (TEP) as plasticising solvent mediators have been prepared and tried for arsenite determination. The membrane having a composition 150:5:150 (PVC:I:DBBP) exhibited the best results with linear potential response in the concentration range of 7.9 x 10(-5) to 1.0 x 10(-1)M of AsO(2)(-) with a slope of 28.8mV/decade. The useful pH range of the sensor is 6.0-10.5. The membrane worked satisfactorily in non-aqueous medium up to 5% (v/v) non-aqueous content. The selectivity coefficient values for mono- and divalent anions indicate good selectivity for arsenite over a large number of anions.
以5,10,15,20-四（4-甲氧基苯基）卟啉钴（II）（TMOPP-Co）（I）作为电活性材料，与磷酸二丁酯（DBBP）、邻苯二甲酸二辛酯（DOP）、1-氯萘（CN）、磷酸三正丁酯（TBP）和磷酸三（2-乙基己基）酯（TEP）作为增塑溶剂介质制备了基于聚氯乙烯（PVC）的膜，并尝试用于亚砷酸盐的测定。组成比例为150:5:150（PVC:I:DBBP）的膜表现出最佳结果，在7.9×10⁻⁵至1.0×10⁻¹M的AsO₂⁻浓度范围内具有线性电位响应，斜率为28.8mV/十倍。该传感器的有效pH范围为6.0 - 10.5。该膜在非水介质中，非水含量高达5%（v/v）时仍能令人满意地工作。一价和二价阴离子的选择性系数值表明，该膜对亚砷酸盐具有良好的选择性，对大量阴离子具有选择性优势。
