期刊
ANALYTICA CHIMICA ACTA
卷 852, 期 -, 页码 63-68出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2014.09.012
关键词
Sodium dodecyl sulfate; Polyethyleneimine; Eosin Y; Anion exchange; Electrochemical sensor
资金
- National Natural Science Foundation of China [20975083, 21273174]
- Municipal Science Foundation of Chongqing City [CSTC-2013jjB00002]
A simple and effective method for the detection of electrochemically inactive sodium dodecyl sulfate (SDS) has been designed, based on different binding affinity of polyethyleneimine (PEI) toward electrochemically active eosin Y and electrochemically inactive SDS. The stronger binding affinity of the PEI toward SDS than eosin Y results in the decrease of the redox peak current of surface confined eosin Y and provides a quantitative readout for the SDS. The difference in value of the cathodic peak current showed a linear relationship with SDS concentration in a concentration range from 1 to 40 mu g mL(-1), and a detection limit of 0.9 mu g mL(-1) for SDS was obtained. Furthermore, the method has been successfully applied to the detection of SDS in real samples. The developed approach provided a simple and reliable detection for SDS and might have potential applications in electrochemical methods for inactive molecules. (C) 2014 Elsevier B.V. All rights reserved.
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