title: Development of electrochemiluminescent inhibition method for determination of gentian violet in aquatic water.
abstract: Gentian violet (GV) was found to quench the electrochemiluminescence (ECL) of the tris(2,2'-bipyridyl)ruthenium(II)/tris-n-propylamine (Ru(bpy)3(2+)-TPA) system at a glass carbon electrode (GCE). Based on the ECL signal changes, a simple and ultrasensitive detection method for GV in aquatic water was established. Under the optimized conditions, the quenched ECL intensity versus the logarithm of the concentration of GV was linear over a concentration range from 1.0×10(-10) to 5.0×10(-7) mol L(-1), and the limit of detection (LOD) was found to be 4.5×10(-12) mol L(-1) (S/N=3). The results obtained by the ECL system were better than other reported methods in literatures in terms of sensitivity or linear response range. The method was successfully applied to determine GV in aquatic water, and the relative standard deviations (RSDs) were found less than 6.3%, and the recoveries were obtained from 98.7 to 111.0%. Moreover, a possible mechanism of the quenching effect was primarily discussed based on UV-visible absorption spectra, cyclic voltammograms and IECL-E curves.
authors.affiliation: Faculty of Materials Science and Chemical Engineering, The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Ningbo University, Ningbo 315211, China. chemwangsui@163.com
authors.forename: Sui
authors.initials: S
authors.lastname: Wang
authors.forename: Tingting
authors.initials: T
authors.lastname: Hao
authors.forename: Xinwei
authors.initials: X
authors.lastname: Yu
authors.forename: Panpan
authors.initials: P
authors.lastname: Gai
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Guo
mesh_terms: D000891:Anti-Infective Agents, Local / Q000032:analysis*; D055664:Electrochemical Techniques / Q000379:methods; D005840:Gentian Violet / Q000032:analysis*; D057230:Limit of Detection; D008163:Luminescent Measurements / Q000379:methods*; D014867:Water / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000891:Anti-Infective Agents, Local; D014874:Water Pollutants, Chemical; D014867:Water; D005840:Gentian Violet