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Novel screen‐printed electrode for the determination of dodecyltrimethylammonium bromide in water samples
Author(s) -
Mohamed Gehad G.,
Ali Tamer Awad,
ElShahat M. F.,
Migahed M. A.,
AlSabagh A. M.
Publication year - 2012
Publication title -
drug testing and analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.065
H-Index - 54
eISSN - 1942-7611
pISSN - 1942-7603
DOI - 10.1002/dta.366
Subject(s) - cetylpyridinium chloride , chemistry , tetraphenylborate , selectivity , detection limit , aqueous solution , bromide , electrode , analytical chemistry (journal) , electrochemistry , pulmonary surfactant , ion association , tap water , ion selective electrode , inorganic chemistry , chromatography , ion , biochemistry , organic chemistry , environmental engineering , engineering , catalysis
The construction and electrochemical response characteristics of a screen‐printed electrode (SPE) for the determination of dodecyltrimethylammonium bromide (DTAB) are described. The sensor was based on the use of DTA‐tetraphenylborate ion association complex as an electroactive material in screen‐printed electrode with dioctylsebacate (DOS) as a solvent mediator. In aqueous solution of pH 3, the sensor displayed a stable response for six months with reproducible potential and linear response for surfactant over the concentration range 1.20 × 10 −2 −5.6 × 10 −7 mol L −1 at 25 °C with Nernstian slope of 55.95 ± 0.58 mV decade −1 for detection limit of 6.8 x 10 −6 mol L −1 . The response time was 6–10 s. The selectivity coefficients indicate excellent selectivity for DTAB over many common cations (e.g. Mg 2+ , Na + , K+, Co 2+ , Ni 2+ , Ca 2+ , Cl − , I − , SO 4 −2 and cetylpyridinium chloride (CPC). The sensor was used successfully for the determining of DTAB in pure form and water samples with average recoveries of 99.98, 98.78, and 99.99%. Copyright © 2011 John Wiley & Sons, Ltd.