汞有机化合物为中性载体的氯离子选择电极的研制

Chloride-Seletive Electrode based on the Netural Carrier of Organomercury Compound

以汞有机化合物{μ—[4.5—二甲基—3.6—双(辛氧基)—1.2—苯]}双(三氟乙酸)二汞(ETH9009)为活性物质,季铵盐为添加剂,研制了氯离子中性载体电极。比较了膜相中季铵盐的含量对电极性能的影响。结果表明,用2.0％ETH9009,33.0％PVC粉、65.0％DOS及10.0mol％TDDACl(相对于ETH9009)制成的电极,对氯离子响应的斜率为-58.0±1.0mV。测定了电极对常见阴离子的选择系数,除ClO_4^-、Br^-有干扰外,其余常见阴离子的logKcl^-,j值均在-3.5～-4.5之间,选择性好。电极的重现性及稳定性均较好。

A chloride-selective electrode based on mercury organic Compound (ETH9009) as anion carrier and tetradodecylammonium chloride as additive has been studied. The result showed that the membrane containing 2. 0%ETH9009,33. 0%PVC,65. 0%DOS and 10. 0% TDDACI (refer to ETH9009)gives a response slope of -58.0mV. The electrode has good selectivity to common anions except ClO4-rand Br-.The repeatity and stability are good.