Application of l-thiazolidine-4-carboxylic acid monolayer in electrochemical determination of copper(II) |
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Authors: | Xin Cui YingZi Fu MiaoSi Li Min Chen Xuan He XiaoHua Liu XiaoMing Feng |
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Institution: | 1. Key Laboratory of Green Chemistry & Technology, Ministry of Education; College of Chemistry, Sichuan University, Chengdu, 610064, China 2. Key Laboratory of Luminescence and Real-Time Analysis, Ministry of Education; College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
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Abstract: | L-Thiazolidine-4-carboxylic acid monolayer was prepared on gold electrodes through the self-assembly approach. Such novel thioether-based monolayer could efficiently preconcentrate Cu2+, which provided a simple, stable and reproducible method for the determination of Cu2+. The modified electrodes were stable enough to be continuously used for one week (more than 30 times regeneration) with lower than 10% decrease in the response. They retained their initial activity for more than one month if used once a day. The calibration curve was linear for Cu2+ from 0.6 to 158.8 μg L?1 with a detection limit of 0.38 μg L?1. The relative standard deviation was 3.2% for a series of six successive measurements. The proposed method was applied in the determination of Cu2+ in mineral water and human hair samples. |
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