Enhancement Action of Lanthanum Hydroxide Nanowire Towards Voltammetric Response of Dobesilate and Its Application

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2008,（1）
• 页码范围: 220-224
• 页数: 5页
• 语种: 英文

摘要

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.