title: Enhancing and inhibiting effects of aromatic compounds on luminol-dimethylsulfoxide-OH(-) chemiluminescence and determination of intermediates in oxidative hair dyes by HPLC with chemiluminescence detection.
abstract: The effect of 36 aromatic compounds on the luminol-dimethylsulfoxide-OH(-) chemiluminescence (CL) was systematically studied. It was found that dihydroxybenzenes, and ortho- and para-substituted aminophenols and phenylenediamines inhibited the CL and phenols with three or more than three hydroxyls except phloroglucin tended to enhance the CL. The CL inhibition and enhancement was proposed to be dependent on whether superoxide anion radical (O(2)(-)) was competitively consumed by compounds in the CL system. Trihydroxybenzenes were capable of generating superoxide anion radical, leading to the CL enhancement, whereas dihydroxybenzenes were superoxide anion radical scavenger, causing the CL inhibition. Based on the inhibited CL, a novel method for the simultaneous determination of p-phenylenediamine, o-phenylenediamine, p-aminophenol, o-aminophenol, resorcinol and hydroquinone by high-performance liquid chromatography coupled with chemiluminescence detection was developed. The method has been successfully applied to determine intermediates in oxidative hair dyes and wastewater of shampooing after hair dyed.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, JinZhai Road 96, Hefei, Anhui 230026, PR China.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhou
authors.forename: Hong
authors.initials: H
authors.lastname: Xu
authors.forename: Guo-Hui
authors.initials: GH
authors.lastname: Wan
authors.forename: Chun-Feng
authors.initials: CF
authors.lastname: Duan
authors.forename: Hua
authors.initials: H
authors.lastname: Cui