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Catalytic Adsorptive Stripping Voltammetry at a Carbon Paste Electrode for the Determination of Amiodarone
Author(s) -
Liu Ning,
Gao Wei,
Song JunFeng
Publication year - 2006
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200690310
Subject(s) - chemistry , detection limit , stripping (fiber) , analyte , voltammetry , catalysis , electrode , adsorptive stripping voltammetry , inorganic chemistry , reproducibility , anodic stripping voltammetry , buffer solution , analytical chemistry (journal) , chromatography , electrochemistry , organic chemistry , electrical engineering , engineering
Voltammetry using solid electrodes usually suffers from the contamination due to the deposition of the redox products of analytes on the electrode surface. The contamination has resulted in poor reproducibility and overelaborate operation procedures. The use of the chemical catalysis of oxidant on the reduction product of analyte not only can eliminate the contamination of analyte to solid electrodes but also can improve the faradaic response of analyte. This work introduced both the catalysis of oxidant K 2 S 2 O 8 and the enhancement of surfactant Triton X‐100 on the faraday response of amiodarone into an adsorptive stripping voltammetry at a carbon paste electrode for the determination of amiodarone. The method exhibits high sensitivity, good reproducibility and simple operation procedure. In 0.2 mol·L −1 HOAc‐NaOAc buffer (pH5.3) containing 2.2×10 −2 mol·L −1 K 2 S 2 O 8 and 0.002% Triton X‐100, the 2.5th‐order derivative stripping peak current of the catalytic wave at 0.3 V (vs. Ag/AgCl) is rectilinear to amiodarone concentration in the range of 2.0×10 −10 –2.3×10 −8 mol·L −1 with a detection limit of 1.5×10 −10 mol·L −1 after accumulation at 0 V for 30 s.