TITLE

Determination of metformin based on amplification of its voltammetric response by a combination of molecular wire and carbon nanotubes

AUTHOR(S)
Xin-juan Tian; Jun-feng Song; Xin-jun Luan; Yao-yu Wang; Qi-zhen Shi
PUB. DATE
December 2006
SOURCE
Analytical & Bioanalytical Chemistry;Dec2006, Vol. 386 Issue 7/8, p2081
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Molecular wires containing copper(II) (CuMW), in the form of the coordination polymer (Cu(II)4(bpp)4(maa)8(H2O)2).2H2O (bpp=1,3-bis(4-pyridyl)propane, maa=2-methylacrylic acid), and multiwalled carbon nanotubes (CNT) have been combined to prepare a paste electrode (CuMW/CNT/PE). The voltammetric response of the CuMW/CNT/PE to metformin (MET) was significantly greater than that of electrodes prepared from other materials, because of both the surface effect of CuMW and CNT and coordination of MET with the Cu(II) ion in the CuMW. A novel voltammetric method for determination of MET is proposed. In pH 7.2 Britton–Robinson buffer, using single sweep voltammetry, the second-order derivative peak current for oxidation of MET at 0.97 V (relative to SCE) increased linearly with MET concentration in the range 9.0 × 10−7–5.0 × 10−5 mol L−1 and the detection limit was 6.5 × 10−7 mol L−1. [Figure not available: see fulltext.]
ACCESSION #
23150767

 

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