title: Chemiluminescence flow injection analysis of 1,3-dichloro-5,5-dimethylhydantoin in swimming pool water.
abstract: A new chemiluminescence (CL) flow-injection method is proposed for the determination of 1,3-dichloro-5,5-dimethylhydantoin (DDH). The method is based on the chemiluminescent reaction of DDH and luminol-H(2)O(2) in an alkaline medium (pH 12.0-12.5). The concentration of the analyte shows a good linear relationship with the produced luminescence intensity in the range of 3.0x10(-8) to 8.0x10(-6) mol l(-1). The detection limit of the proposed method is 1.0x10(-8) mol l(-1) and the relative standard deviation (R.S.D.) is 4.7% (n=5) at 5.0x10(-7) mol l(-1). This method was successfully applied to the determination of trace amounts of this disinfectant in water samples obtained from five different swimming pools. Satisfying recovery values were also obtained.
authors.affiliation: Department of Chemistry, Tsinghua University, 100084 Beijing, People's Republic of China; Department of Chemistry, Zhangzhou Teachers' College, 363000 Zhangzhou, People's Republic of China.
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Rao
authors.forename: Xinrong
authors.initials: X
authors.lastname: Zhang
authors.forename: Willy R G
authors.initials: WR
authors.lastname: Baeyens