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標題Title: The Stirring Rate on the Detection of Hydrogen Peroxide for Electrode Modified with Meldola’s Blue
作者Authors: 林庭立,羅濟玟 ..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: 論文Thesis
關鍵詞Keyword: Stirring Rates, Meldola's Blue, Carbon Paste Electrode, Sensitivity, Hydrogen Peroxide
摘要Abstract: Both the hydrogen peroxide sensor and glucose biosensor are important research subjects nowadays. The glucose and oxygen can be catalyzed by the glucose oxidase to produce the gluconic acid and hydrogen peroxide, and therefore, as the concentration of hydrogen peroxide can be determined, the concentration of glucose can also be determined. A study was conducted to use the Meldola’s Blue to modify the carbon paste electrode. 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℃, -300 mV operating potential, and in 0.05 M phosphate buffer solution (PBS), the TB (Time Base) graphs for the carbon paste electrode at different stirring rates were plotted to evaluate the effect of stirring rates on the responding current of detection of hydrogen peroxide. At the optimum operating conditions -300 mV operating potential, 500 rpm stirring rate and in 0.05 M PBS buffer solution ( pH = 7.4 ) , when the carbon paste electrode was modified with Meldola’s Blue [Meldola’s Blue : carbon powders : carbon paste = 2 :15 :15 ( weight ratio )] , the detection limit was 0.02 mM H2O2 , the linear range was 0.02~1.4 mM H2O2 , R2 = 0.9994 , the sensitivity was 159.39 µA/cm2.mM H2O2.



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