%0 Journal Article
%T Simultaneousdetectionofhydroxylamineandphenolusingp-aminophenol-modifiedcarbonnanotubepasteelectrode
%A Ali A. Ensafi
%A E. Heydari-Bafrooei
%A B. Rezaei
%J ´ß»¯Ñ§±¨
%P 1768-1775
%D 2013
%R 10.1016/S1872-2067(12)60652-4
%X £¿Acarbonpasteelectrodethatwaschemicallymodifiedwithmultiwallcarbonnanotubesandp-aminophenolwasusedasaselectiveelectrochemicalsensorforthesimultaneousdetectionofhydroxylamine(HX)andphenol.Cyclicvoltammetry,doublepotential-stepchronoamperometry,squarewavevoltammetry(SWV),andelectrochemicalimpedancespectroscopywereusedtoinvestigatetheuseofp-aminophenolinthecarbonnanotubespastematrixesasamediatorfortheelectrocatalyticoxidationofHXandphenolinaqueoussolution.Thecoefficientofelectrontransferandcatalyticreactionrateconstantweredeterminedusingtheelectrochemicalmethods.Underoptimizedconditions,theelectrocatalyticoxidationcurrentpeaksforHXandphenolincreasedlinearlywithconcentrationintherangeof0.5-180.0and10.0-650.0¦Ìmol/LforHXandphenol,respectively.ThedetectionlimitsforHXandphenolwere0.15and7.1¦Ìmol/L,respectively.TheanodicpotentialpeaksofHXandphenolwereseparatedby0.65VinSWV.Becauseofgoodselectivityandsensitivity,thepresentmethodprovidesasimplemethodfortheselectivedetectionofHXandphenolinpracticalsamplessuchaswatersamples.
%K Hydroxylamineandphenol
%K determination
%K p-Aminophenol
%K Multiwallcarbonnanotubepaste
%K electrode
%K Voltammetry
%U http://www.chxb.cn/CN/abstract/abstract21065.shtml