title: Surface enhancement of WO3 nanowires toward the oxidation and electrochemical detection of honokiol in traditional Chinese medicine.
abstract: WO(3) nanowires (nano-WO(3)) were synthesized using a simple hydrothermal technique, and then used to modify the carbon paste electrode (CPE). The electrochemical behavior of honokiol on the unmodified CPE and nano-WO(3) modified CPE was compared. It was found that nano-WO(3) remarkably increased the oxidation signal of honokiol. The influences of supporting electrolyte, amount of nano-WO(3), accumulation potential and time were studied on the oxidation peak current of honokiol. Based on the strong enhancement effect of nano-WO(3), a sensitive, simple and rapid electrochemical method was developed for the detection of honokiol. The linear range was from 3×10(-8) to 2.0×10(-5)M, and the detection limit was as low as 1×10(-8)M after 2-min accumulation. Finally, it was used to determine honokiol in traditional Chinese medicines, and the recovery was over the range between 96.5% and 98.8%.
authors: Key Laboratory of Biological Resources Protection and Utilization of Hubei Province, Department of Chemistry, Hubei Institute for Nationalities, Enshi, China.
authors: Wanyun
authors: W
authors: Qu
authors: Xiaoyong
authors: X
authors: Xiong
authors: Weibing
authors: W
authors: Hu
authors: Pan
authors: P
authors: Zhang
authors: Qi
authors: Q
authors: Luo
authors: Shenghui
authors: S
authors: Zhang
mesh_terms: D001713:Biphenyl Compounds / Q000032:analysis*; D002244:Carbon / Q000737:chemistry; D004365:Drugs, Chinese Herbal / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D006801:Humans; D006863:Hydrogen-Ion Concentration; D017705:Lignans / Q000032:analysis*; D057230:Limit of Detection; D008516:Medicine, Chinese Traditional; D008855:Microscopy, Electron, Scanning; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D013499:Surface Properties; D014414:Tungsten / Q000737:chemistry*; D000498:Allyl Compounds; D010636:Phenols
chemical_list: D001713:Biphenyl Compounds; D002244:Carbon; D004365:Drugs, Chinese Herbal; D017705:Lignans; D010087:Oxides; D014414:Tungsten; C005499:honokiol; D000498:Allyl Compounds; D010636:Phenols; C511604:tungsten oxide