铝酸根离子选择性膜电极的研究

Investigation of Aluminat Ion Anion-selective Membrane

分别以两种季铵盐为活性物质 ,以聚乙烯醇 (PVA)和壳聚糖 (CS)的共混物为支撑体制成了铝酸根离子选择性膜电极。测定了不同浓度的铝酸钠溶液 ( 0 1mol/LNaOH)的膜电位及响应时间。实验结果表明 :这两种活性物质对铝酸根离子的响应不太理想 ,而且纯PVA -CS膜与加了活性物质的PVA -CS膜对铝酸根离子的响应非常接近。这说明以PVA -CS膜为膜支撑体不理想 ,还需要另外寻找惰性膜支撑体和合适的活性物质 。

Preparation of anion-selective membrane electrode for aluminate ion with 1,2-exoxy-propyl-trinoctyl ammonium chloride and hexadecyltrioctylammonium iodide as active materials,and with polyvinyl alcohol(PVA)and Chitosan (CS) as membrane materials was carried out.Membrane potential at various concentrations of aluminate anion was studied at the concentration(0.1 mol/L of hydroxide sodium solution).Experimental results showed that these two active materials for the response of aluminate anion with pure PVA-CS membrane eletrode and PVA-CS membrane electrode adding active materials are almost the same in the same determing conditions.Therefore,we should look for a nonactive membrane material and proper active materials for the aluminate anion-selective electrode.