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4'-Aminobenzo-15-crown-5 를 수식한 새로운 K+-ISFET 의 제조와 감응특성
이홍락,윤종훈,양승태,정동숙,손병기 ( H . L . Lee,J . H . Yun,S . T . Yang,D . S . Jung,B . K . Sohn ) 한국센서학회 1992 센서학회지 Vol.1 No.1
A new potassium sensitive field effect transistor modified with 4`-aminobenzo-15-crown-5 was prepared and its response characteristics were evaluated. The response slope of K^+-ISFET for pH was 30.0 mV/decade and the response time was more than 3 minutes. And the response slope and time of the K^+-ISFET for potassium ion was 19.5±0.2 mV/decade and about 3 minutes, respectively. The linear response range of the sensor for potassium ion was 2.0X10^(-4)∼1.0X10^(-2)M. The selectivity coefficients of the K^+-ISFET for the alkali and alkaline earth metal ions were also evaluated. Sodium, ammonium and calcium ions exhibited relatively significant interference. The long term stability of the sensor was remarkably improved and it could be used for more than 50 days.