文献类型：期刊文献

英文题名：A hybrid method combining an electrochemical technique and fluorescence measurement for the highly selective and sensitive detection of Cd2+

作者：Li, Meng;Li, Da-Wei;Long, Yi-Tao[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2015

卷号：7

期号：2

起止页码：472

外文期刊名：ANALYTICAL METHODS

收录：;EI(收录号：20150200408833);WOS:【SCI-EXPANDED(收录号:WOS:000347312700011)】；

基金：This research was supported by the 973 Program (2013CB733700), the National Science Fund for Distinguished Young Scholars (21125522), the Shanghai Pujiang Program (12JC1403500), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning (YJ0130504), and the National Natural Science Foundation of China (21327807). Meng Li is supported by the Sino-UK Higher Education Research Partnership for PhD Studies.

语种：英文

外文关键词：Fluorescence - Electrochemical deposition - Reduction - Metal ions

摘要：We developed a hybrid method combining an electrochemical technique and fluorescence measurement to detect Cd2+ in water samples. The electrochemical deposition and stripping technique provided a clean and selective pretreatment for transferring and concentrating Cd2+ from original turbid samples to blank buffer, followed by fluorescence quantification. Cd2+ in the original samples was co-deposited with Bi3+, which could provide a fresh bismuth film and concentrate a higher amount of Cd2+ onto a portable screen-printed electrode. The water-soluble compound Fura-2 was introduced as the fluorescent indicator for Cd2+ quantification, with the purpose of eliminating the error caused by the transfer to buffer. The detection results using real samples exhibited an excellent anti-interference ability, and showed a good linear correlation (correlation coefficient of R = 0.993). Moreover, the system was highly sensitive as a detection limit of 1.0 nmol L-1 could be achieved through a repeated electrochemical pretreatment process. This hybrid method is selective, sensitive, convenient and portable. It is promising for in field heavy metal ion determination in remote environments.