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以转型了的N2 63 Cl,N2 63 I和四丁基碘化铵作为电活性物质 ,以聚乙烯醇 (PVA)和壳聚糖 (CS)作为聚合物支持体 ,制成了对铝酸根离子有响应的离子选择性膜电极。其中以N2 63 I制成的膜电极对铝酸根离子的响应较好 ,并研究了N2 63 I的用量及转型条件对该膜电极性能的影响。考察了在不同碱度的待测溶液中以及升温条件下 ,该膜电极的膜电位与铝酸根离子浓度的关系。结果表明 ,该膜电极在 0 .0 1～ 2mol/L的浓度范围内对铝酸根离子有良好的Nernst响应 ,其级差随着温度的升高而增大 ,测得常温下膜电位级差约为 1 0 .3mV每 1 0倍浓度变化 ,60℃时约为 1 5.4mV每 1 0倍浓度变化 ,75℃时约为 1 8.3mV每 1 0倍浓度变化。
With the transition of N2 63 Cl, N2 63 I and tetrabutylammonium iodide as the electroactive substances, polyvinyl alcohol (PVA) and chitosan (CS) as the polymer support, made of aluminate ions Responsive ion selective membrane electrode. Among them, the membrane electrode made of N2 63 I had a good response to aluminate ions, and the effect of N2 63 I dosage and transition conditions on the performance of the membrane electrode was studied. The relationship between the membrane potential of the membrane electrode and the concentration of aluminate ions was investigated in the solution under different alkalinity and the temperature rising conditions. The results show that the membrane electrode has a good Nernst response to aluminate ions in the concentration range of 0.01 ~ 2mol / L, and the difference of the membrane electrode increases with the increase of the temperature. The difference of membrane potential at room temperature is about 1 0. 3mV every 10 times the concentration change, 60 ℃ when the approximately 1 5.4mV every 10 times the concentration change, 75 ℃ when the approximately 1 8.3mV every 10 times the concentration change.