Determination of Aniline by Phenothiazine modofied electrode

• Main Authors: Pei-Yan Chen, 陳佩彥
• Other Authors: Meng-Shan Lin
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/12551829214708234039

碩士 === 淡江大學 === 化學學系 === 87 === Aniline and its derivatives are very important compounds in industrial application. Usually these compounds are used to produce dyestuff , polymers and pesticides etc. These derivatives have been suspected as a carcinogen among the environment pollutants. Aniline can be oxidized on +760 mV (Ag/AgCl). However, the direct oxidation of aniline can be troublesome as the polymerization effect on electrode surface when use electrochemical method. Because the polymerization obstructs electron transfer to electrode surface, thus, signal will decrease and cause poor reproducibility. A phenothiazine modified carbon ink electrode was used to detect aniline. The modified electrode can avoid polymerization effect and apply good reproducibility. At the measurement of 10μM aniline, the relative standard deviation is 2.6%(n=20). The estimated detection limit (S/N=3) is 0.1μM and the linearity of response is up to 20μM (with correlation coefficient R=0.9997)