适合低pH范围测量的新型中性载体膜pH电极的研究

Polyvinyl Chloride Membrane pH Electrode Applied for Low pH Range

本文设计合成了一种在低PH范围对氢离子有很好Nernst响应的新型中性载体——N,N-二辛基菸酰胺(DONA),并把它制成PVC膜PH电极,测试了该电极的线性范围、选择性、稳定性、重现性和内阻等各项性能参数,并试验了电极抗氢氟酸腐蚀的能力,将该电极用于氢氟酸的电离常数测定时获得了满意的结果.

A new neutral carrier N,N-dioctyl nicotinic amide (DONA) is synthesized for the preparation of polyvinyl chloride membrane pH electrode, the electrode has excellent potential response in low pH range. In addition, the linear pH response range, potentiometric selectivity, stability, reproducibility and resistance of the electrode are investigated. The electrode has been applied to the determination of ionization constant for hydrofluoric acid with satisfactory results.