title: [Study on the enhanced spectrum quantitative analysis of SDBS induced by beta-cyclodextrin].
abstract: A novel enhanced ultraviolet absorption spectrometry method was developed for the quantitative analysis of SDBS induced by beta-cyclodextrin(beta-CD) with strong interferences. The ultraviolet absorption spectra of SDBS indicated that the presence of beta-CD could result in the enhancement of absorption intensities of SDBS. A good linearity was obtained between the UV-absorption intensity of the system and the concentration of SDBS. The results indicated that the determination precision and the determination ranges of SDBS could be greatly improved by beta-CD. The effect of several common interfering substances (SDS, OP-10, HPAM) on the determination of SDBS could be significantly reduced in beta-CD aqueous solution. Therefore, the maximum errors of the determined SDBS were less than 2.0% under multifactor interferences, and the precision of the method was also as high as 10(-2) - 10(-3) mg x L(-1). The stable inclusion of beta-CD and SDBS could be automatically formed in water with molar ratio of 1 : 1. The stability constant of the inclusion, K(a), was 87 and the standard Gibbs function of molar reaction, delta(gamma)G(m)(see symbol) (298 K), was -11.064 kJ x mol(-1). FTIR analysis exhibited that SDBS could be induced by beta-CD since the phenyl group in SDBS molecule could exist stably in the cavity of beta-CD and form the inclusion.
authors.affiliation: College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China. shidongpo2006@126.com
authors.forename: Dong-Po
authors.initials: DP
authors.lastname: Shi
authors.forename: Xian-Qing
authors.initials: XQ
authors.lastname: Yin
authors.forename: Yan-Cheng
authors.initials: YC
authors.lastname: Zheng
authors.forename: Wu
authors.initials: W
authors.lastname: Chen
authors.forename: Jia-Xin
authors.initials: JX
authors.lastname: Fu
authors.forename: Zhao-Hua
authors.initials: ZH
authors.lastname: Ren