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Enhancement Action of Lanthanum Hydroxide Nanowire Towards Voltammetric Response of Dobesilate and Its Application
Author(s) -
LIU Li,
SONG JunFeng,
YU PengFei,
CUI Bin
Publication year - 2008
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.200890028
Subject(s) - chemistry , detection limit , electrode , lanthanum , redox , calcium hydroxide , inorganic chemistry , linear range , carbon paste electrode , linear sweep voltammetry , hydroxide , sulfonate , electrochemistry , nuclear chemistry , cyclic voltammetry , chromatography , organic chemistry , sodium
Voltammetric response of calcium dobesilate (calcium 2,5‐dihydroxybenzene sulfonate, CD) was observably enhanced at lanthanum hydroxide nanowire (LNW) modified carbon paste electrode. The enhancement action was characterized by both the increase of peak current and the reduction of peak potential separation of a pair of the redox peaks of CD, which resulted from both the increase of efficient surface area of the modified electrode and the chemical interaction of LNW with CD. With the sensitive oxidation peak of CD at the LNW/CPE, a linear sweep voltammetric method for the determination of CD was proposed. A linear range of 3.0×10 −10 −1.0×10 −8 mol·L −1 was obtained along with a detection limit of 5×10 −11 mol·L −1 .