부산대학교 도서관

This paper describes the performance of an amperometric sensor for thiol detection. The sensor was designed based on a Prussian blue(PB) glassy carbon (GC) electrode. Prussian blue was chemically deposited onto the glassy carbon electrode by a dropletting method.Thiol compounds were detected at the PB-modied GC electrode by electrooxidation. A PB-modied glassy carbon electrode wasapplied to detect thiol at an applied potential of +0.25 V versus the Ag/AgCl electrode. This sensor showed an excellent electrochemicalresponse for thiol compounds belowl mol level with high sensitivity and selectivity and short response time. In the case of aminoetha-nethiol, the sensor showed a wide linearity range with RSDs <4% for the whole analyses, which reected the highly reproducible sensorperformance. The optimal conditions were investigated. By using the optimized conditions, the detection limit was found to 0.4l M foraminoethanethiol (based onS/N = 3).