A RAPID NITRATE DETECTION SYSTEM BASED ON POLYPYROLE ION SELECTIVE ELECTRODE
In this paper, a rapid nitrate ion detection system with automatic fluidic control is presented. The ion selective nitrate electrodes were prepared by electrochemically mediated imprinting doping of polypyrrole. Calibration was first performed using a sequence of nitrate solutions of 10-1M, 10-3M and 10-4M, delivered by miniature pump and valves to a test chamber where ion selective nitrate electrodes were mounted. The calibration time was 4.5 minutes while the actual test time for a nitrate solution sample is only 90 s. It was found that the potential difference per decade concentration change in the ion selective electrode was a constant from 10-4 M to 10-1M of nitrate concentrations. Based on the potentiometric response, the nitrate detection limit was found to be about 10-4M. As such, a low-cost, rapid nitrate contamination detection system in soil and drinking water is demonstrated.
Nitrate Fast Detection Polypyrrole Ion Selective Electrode (ISE) Fluidic Control System
Miao Zhang Li Li Simon S.Ang Chien V.Nguyen
Key Laboratory on Modern Precision Agriculture,System Integration Research of Ministry of Education, Department of Electrical Engineering,University of Arkansas,Arkansas 72701,USA
国际会议
北京
英文
1-14
2009-10-14（万方平台首次上网日期，不代表论文的发表时间）