二环已基－18－冠－6钾涂丝电极研究与应用  

Investigation and Application of Dicyclohexano-18-Crown-6 Potassium Coated Wire Electrode

作　　者：岑传铨 庄秀润 

机构地区：[1]华侨大学应用化学系

出　　处：《华侨大学学报（自然科学版）》1994年第3期276-279,共4页Journal of Huaqiao University(Natural Science)

摘　　要：研究以二环已基－１８－冠－６钾为电活性物质的ＰＶＣ涂丝电极测定钾离子的方法．该电极对Ｋ＋的Ｎｅｒｎｓｔ响应范围为１０－２～１０－５ｍｏｌ·Ｌ－１，级差为５６ｍＶ／ｐＫ＋，检测下限为８．９１×１０－６ｍｏｌ·Ｌ－１（ＫＣｌ），转换系数为９６．３％，适用ｐＨ范围为４．０～８．０，电极的再现性、选择性、响应时间均较好，且用于血清中Ｋ＋含量的测定，结果与用火焰光度法测定相一致．For determining potassium ion,the authors present a coated wire electrode in which the electroactive membrane is composed of dicyclohexano-18-crown-6 potassium, combining with polyvinyl chloride. A linear Nernst response of the electrode to K+ is obtained over a concentration range of 10-5￣ 10-1mol.L-1K+,with a slope of 56 mV.(pK+ )-1 . It shows a detection limit of 8. 91×10-6 mol. L-1(KCl) and a conversion coefficient of 96. 3%and an appropriate pH range of 4. 0￣8. 0. It also shows a fairly good repeatability, selectiveness, and response time. For determining K+ in human serum,the result obtained by this electrode coincides with that by the flame photometer.

关 键 词：涂丝电极 DCH-18-冠-6 钾 电极 

分 类 号：TM24[一般工业技术—材料科学与工程]