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Electrochemiluminescence Sensor for Selective Preconcentration and Sensitive Detection of Napropamide Using Water‐Soluble Sulfonated Graphene
Author(s) -
Wang ShiRu,
Wang Sui,
Guo ZhiYong
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201300629
Subject(s) - electrochemiluminescence , luminol , nafion , detection limit , luminescence , adsorption , analyte , graphene , electrode , materials science , chemiluminescence , buffer solution , chromatography , chemistry , nanotechnology , electrochemistry , organic chemistry , optoelectronics
Abstract A novel electrochemiluminescence (ECL) sensor for napropamide determination was prepared using the water‐soluble sulfonated graphene (sulfonated‐G) as solid‐phase microextraction (SPME) material, based on selective preconcentration of target onto an electrode and followed by luminol ECL detection. The effects of pH, adsorption time, buffer solution and the luminescence agent on ECL intensity were optimized. Under the optimized conditions (pH 6; adsorption time 5 min; buffer solution pH 11.0 Na 2 CO 3 aHCO 3 ; luminescence agent luminol; stirring speed 400 rpm), the lowest detection limits (1.0 µg L −1 ) and good linear range ( r 2 ≥0.99) were obtained for the analyte, indicating the superior performance of Nafion/sulfonated‐G/GCE for detecting napropamide.