An electrochemical sensor for p-aminophenol based on the mesoporous silica modified carbon paste electrode |
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Authors: | Dong Sun Xiaokun Li Huajie Zhang Xiafeng Xie |
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Affiliation: | 1. School of Pharmacy, Wenzhou Medical College , Wenzhou 325035 , China sun_dong11@163.com;3. School of Pharmacy, Wenzhou Medical College , Wenzhou 325035 , China |
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Abstract: | A mesoporous silica was synthesised and used to modify the surface of carbon paste electrode (CPE). The electrochemical behaviours of p-aminophenol were investigated. Compared to the unmodified CPE, the mesoporous silica-modified CPE obviously lowers the oxidation potential of p-aminophenol, and remarkably increases its oxidation peak current. The effects of pH value, amount of mesoporous silica, accumulation potential and time were examined. As a result, a sensitive, rapid and convenient electroanalytical method was developed for p-aminophenol. The linear range is from 0.025?mg?L?1 to 3?mg?L?1, and the limit of detection is 0.01?mg?L?1 after 2-min accumulation. Finally, the method was successfully used to determine p-aminophenol in water samples. |
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Keywords: | aminophenol detection mesoporous silica electrochemical sensor |
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