%0 Journal Article
%T Applicationof3,4-dihydroxycinnamicacidasasuitablemediatorandmultiwallcarbonnanotubesasasensorfortheelectrocatalyticdeterminationofL-cysteine
%A Mohsen Keyvanfard
%A Rasoul Salmani-mobarakeh
%A Hassan Karimi-Maleh
%A Khadijeh Alizad
%J ´ß»¯Ñ§±¨
%P 1166-1172
%D 2014
%R 10.1016/S1872-2067(14)60065-6
%X £¿AhighlysensitiveelectrochemicalsensorwaspreparedforthedeterminationofL-cysteineusingamodifiedmultiwallcarbonnanotubespasteelectrodeinthepresenceof3,4-dihydroxycinnamicacid(3,4-DHCA)asamediator,basedonanelectrocatalyticprocess.TheresultsindicatethattheelectrodeiselectrocatalyticallyefficientfortheoxidationofL-cysteineinthepresenceof3,4-DHCA.TheinteractionbetweenthemediatorandL-cysteinecanbeusedforitssensitiveandselectivedetermination.Usingchronoamperometry,thecatalyticreactionrateconstantwascalculatedtobe2.37¡Á102mol-1Ls-1.ThecatalyticpeakcurrentwaslinearlydependentontheL-cysteineconcentrationintherangeof0.4-115¦Ìmol/L.Thedetectionlimitobtainedbylinearsweepvoltammetrywas0.25¦Ìmol/L.Finally,themodifiedelectrodewasexaminedasaselective,simple,andprecisenewelectrochemicalsensorforthedeterminationofL-cysteineinrealsamples.
%K L-Cysteine
%K Multiwallcarbonnanotube
%K Voltammetry
%K 3
%K 4-Dihydroxycinnamicacid
%U http://www.chxb.cn/CN/abstract/abstract21310.shtml