溶剂聚合膜pH电极作内电极的气敏电极的研究

研究了以中性载体为活性物的石墨内导平头溶剂聚合膜(SPM)pH电极作内电极的二氧化碳和氨气敏电极。电极的性能取决于中性载体的特性,其中以菸酸十八酯为内电极膜活性物的二氧化碳气敏电极和以二辛基十八胺为活性物的氨气敏电极性能较佳。二氧化碳气敏电极用作丙酮酸脱羧酶酶电极的原电极,其性能院于传统的以玻璃pH电极作内电极的二氧化碳气敏电极。

The Studies on Gas-Sensing Probes with a Graphite Contacted Solvent Polymeric Membrane pH Inner Electrode

The present paper describes carbon-dioxide and ammonia gas-sensing probes containing neutral carriers based inner pH electrodes. Octadecyl nicotinate (ODN), Hexadecyl nicotinate (HDN) , dioctyloctadecylamine (DOODA) , and dimethyloctadecylamine (DMODA) , were used as neutral carries for preparation of electrodes with graphite inner contacts forming flat solvent polymeric membrane (SPM) pH sensitive tips. The results obtained show that the potentiometric response characteristics of the gas-sensing probes depend on the nature of the carriers. Carbon dioxide gas-sensing probe with ODN and ammonia gas-sensing probe with DOODA as neutral carries of the inner pH electrodes have fair potentiometric response characteristics. A corn navel tissue based pyruvate decarboxylase was prepared using the carbon-dioxide probe as primary electrode. The response characteristics such as electrode slope of the enzyme probe prepared was better than those of the glass inner electrode counterparts.