Application of L-thiazolidine-4-carboxylic acid monolayer in electrochemical determination of copper(Ⅱ)  

作　　者：CUI Xin1,FU YingZi1,2,LI MiaoSi1,CHEN Min2,HE Xuan1,LIU XiaoHua1 & FENG XiaoMing1 1Key Laboratory of Green Chemistry & Technology,Ministry of Education College of Chemistry,Sichuan University,Chengdu 610064,China 2Key Laboratory of Luminescence and Real-Time Analysis,Ministry of Education College of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China 

出　　处：《Science China Chemistry》2010年第1期257-262,共6页中国科学（化学英文版）

基　　金：support from the National Natural Science Foundation of China (Grant Nos. 20732003 & 20972128)

摘　　要：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.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.

关 键 词：L-thiazolidine-4-carboxylic acid COPPER IONS gold electrode THIOETHER MONOLAYER 

分 类 号：O621.2[理学—有机化学]