2011
DOI: 10.1007/s10800-011-0346-4
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Adsorptive stripping voltammetric determination of podophyllotoxin, an antitumour herbal drug, at multi-walled carbon nanotube paste electrode

Abstract: Adsorption stripping voltammetry, a very sensitive electroanalytical method, was employed to determine podophyllotoxin, a kind of antitumour herbal drug at a multiwall carbon nanotube (MWCNT)-modified carbon paste electrode (CPE) surface. In the following anodic sweep from 0.5 to 1.5 V, podophyllotoxin, adsorbed at the MWCNTmodified CPE surface, was oxidized and yielded a sensitive oxidation peak with E 1/2 /E p approximately 1.16 V/1.18 V over the scan rates of 10-120 mV s -1 . From CV and SWV studies of podo… Show more

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Cited by 24 publications
(20 citation statements)
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“…Hence, CMEs have been successfully utilized for M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 determination of various drug molecules in our laboratory [10][11][12][13]. Carbon nanotubes (CNTs) have become the subject of intense researches in the last decades because of their unique properties and the promising applications in any aspect of nanotechnology.…”
Section: Introductionmentioning
confidence: 99%
“…Hence, CMEs have been successfully utilized for M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 determination of various drug molecules in our laboratory [10][11][12][13]. Carbon nanotubes (CNTs) have become the subject of intense researches in the last decades because of their unique properties and the promising applications in any aspect of nanotechnology.…”
Section: Introductionmentioning
confidence: 99%
“…A sequential shift of the anodic peak potential with the augmentation of solution pH was also observed (Fig. 5), indicating that the protons participate in the electrode reaction process of 5-HT [30,31]. A linear dependence of peak potential on pH of the supporting electrolyte was obtained following a linear equation: E/mV = 787.4 -62.64 pH; R 2 = 0.997.…”
Section: Effect Of Supporting Electrolyte and Phmentioning
confidence: 67%
“…A linear For finding the adsorptive character of the drug at the electrode surface, a cyclic voltammogram was recorded after 60 s pre-concentration time at −0.15 V and second cycle at the same electrode. A substantial decrease in the peak current value in subsequent scans was observed, which reached a steady state, indicating that reserpine shows also adsorptive characteristics at electrode surface [30,31]. This finding is confirmed by plotting log i p against log (Fig.…”
Section: Cyclic Voltammetric Behaviourmentioning
confidence: 70%