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標題Title: The Operating Potential on the Sensitivity of Detection of Hydrogen Peroxide for the Carbon Paste Electrode Modified with Ferrocene
作者Authors: 林庭立,郭寶財 ..等
上傳單位Department: 化學工程與材料工程系
上傳時間Date: 2011-5-29
上傳者Author: 林庭立
審核單位Department: 化學工程與材料工程系
審核老師Teacher: 林浩
檔案類型Categories: 專題報告Project Report
關鍵詞Keyword: Electrode , Ferrocene , Operating Potential , Sensitivity, Hydrogen Peroxide Sensor
摘要Abstract: A study was conducted to use the ferrocene to modify the carbon paste electrode. Because the ferrocene(Fe(C5H5)2) possesses the excellent catalytic characteristic, it can be used with the graphite carbon powders which possess the excellent conductivity to make the carbon paste electrode and to elevate the responding current of hydrogen peroxide. The responding current of hydrogen peroxide is detected in the phosphate buffer solution(PBS) and then the concentration of the hydrogen peroxide can be obtained and consequently, the concentration of the glucose can be determined. At 30℃, and in 0.05 M phosphate buffer solution (PBS), the TB (Time Base) graphs for the carbon paste electrode at different operating potentials were plotted to evaluate the effect of the operating potential on the responding current of detection of hydrogen peroxide. At the optimum operating conditions -0.2 V operating potential, 500 rpm stirring rate and in 0.05M PBS buffer solution ( pH = 7.4 ) , when the carbon paste electrode was modified with ferrocene [ferrocene : graphite carbon powders = 3 : 7 ( weight ratio )] , the detection limit was 0.02 mM H2O2 , the linear range was 0.02~1.2 mM H2O2 , R2 = 0.9998 and the sensitivity was 161.43µA/cm2.mM H2O2. This study can be further applied to the glucose biosensor.



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