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Coupling of NiO nanoparticles and room temperature ionic liquid for fabrication of highly sensitive voltammetric sensor in tryptophan analysis
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نویسنده
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shabani-nooshabadi m. ,roostaee m.
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منبع
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analytical and bioanalytical electrochemistry - 2016 - دوره : 8 - شماره : 5 - صفحه:578 -588
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چکیده
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A nio nanoparticle (nio/nps) ionic liquid (n-hexyl-3-methylimidazolium hexafluoro phosphate) modified carbon paste electrode (nio/nps/hmihp/cpe) was developed for the analysis of tryptophan. the electrochemical behavior of tryptophan was investigated using cyclic voltammetry,chronoamperometry and square wave voltammetry (swv). nio nanoparticles synthesized by direct chemical precipitation method and characterized with scanning electron microscopy (sem) and x-ray diffraction (xrd) methods. these studies revealed that the oxidation of tryptophan is facilitated at nio/nps/hmihp/cpe. using swv,the method allowed determination of tryptophan in the linear working range of 0.08-350 μm with detection limit of 0.04 μm (s/n=3). the nio/nps/hmihp/cpe was used for the determination of tryptophan in urine and water samples. © 2016 by cee (center of excellence in electrochemistry).
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کلیدواژه
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Ionic liquid; Modified electrode; NiO nanoparticle; Tryptophan analysis
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آدرس
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department of analytical chemistry,faculty of chemistry,university of kashan,kashan,iran,institute of nano science and nano technology,university of kashan,p.o. box 87317, ایران, institute of nano science and nano technology,university of kashan,p.o. box 87317, ایران
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Authors
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