中性载体冠醚PVC膜锂离子选择性电极的研制

THE PREPARATION OF LITHIUM SELECTIVE PVC MEMBRANE ELECTRODE BASED ON NEUTRAL CARRIER OF CROWNETHER

本文以新合成的３′－（２，５，８一三氧杂壬基）一苯并－１２－冠－４和（２，３：９，１０－二苯并－１４－冠－４）－６－氧基乙酰二环己胺为活性物质，磷酸三丁酯为增塑剂，制成两种锂离子选择性电极，并分别研究了它们的特性，如响应性能，电极电位与ｐＨ的关系，电极的选择性，再现性、稳定性，响应时间，电极内阻以及电极寿命等．

s,This paper reports the crown ether PVC membrane Lithium electrodes which are prepared using 3′ (2,5,8 trioxyheterononyl) Benzo 12 Crown 4 and (2,3:9,10 dibenzo 14 Crown 4) 6 oxyethlacetodicyclohexaamine as the active materials,tributyl phosphate as the plasticates. They exhibt Nernstain response to Lithium ions in the range of 1×10-4 ～1×10-1 mol·L-1 with the average slopes 64.3 mV/decade and 64.8mV/decade (18℃),respectively. The selectiveity of electrode of the former is better than the latter. The respoes time,reproducibility and stability of two electrods are satisfactory.