title: A chemiluminescence method to detect hydroquinone with water-soluble sulphonato-(salen)manganese(III) complex as catalyst.
abstract: A water-soluble sulphonato-(salen)manganese(III) complex with excellent catalytic properties was synthesized and demonstrated to greatly enhance the chemiluminescence signal of the hydrogen peroxide - luminol reaction. Coupled with flow-injection technique, a simple and sensitive chemiluminescence method was first developed to detect hydroquinone based on the chemiluminescence system of the hydrogen peroxide-luminol-sulphonato-(salen)manganese(III) complex. Under optimal conditions, the assay exhibited a wide linear range from 0.1 to 10 ng mL(-1) with a detection limit of 0.05 ng mL(-1) for hydroquinone. The method was applied successfully to detect hydroquinone in tap-water and mineral-water, with a sampling frequency of 120 times per hour. The relative standard deviation for determination of hydroquinone was less than 5.6%, and the recoveries ranged from 96.8 to 103.0%. The ultraviolet spectra, chemiluminescence spectra, and the reaction kinetics for the peroxide-luminol-sulphonato-(salen)manganese(III) complex system were employed to study the possible chemiluminescence mechanism. The proposed chemiluminescence analysis technique is rapid and sensitive, with low cost, and could be easily extended and applied to other compounds.
authors.affiliation: School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China.|School of Science, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, People's Republic of China.
authors.forename: Guangbin
authors.initials: G
authors.lastname: Zhang
authors.affiliation: School of Science, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, People's Republic of China.
authors.forename: Yuhai
authors.initials: Y
authors.lastname: Tang
authors.affiliation: School of Science, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, People's Republic of China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Sun
authors.affiliation: School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China.
authors.forename: Hua
authors.initials: H
authors.lastname: Yu
authors.affiliation: School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Du
authors.affiliation: School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Fu
mesh_terms: D002384:Catalysis; D005029:Ethylenediamines / Q000737:chemistry*; D006873:Hydroquinones / Q000032:analysis*; D049449:Luminescence; D008163:Luminescent Measurements / Q000379:methods*; D008345:Manganese / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D012995:Solubility; D013451:Sulfonic Acids / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D005029:Ethylenediamines; D006873:Hydroquinones; D009942:Organometallic Compounds; D013451:Sulfonic Acids; D014867:Water; D008345:Manganese; C011452:disalicylaldehyde ethylenediamine; C031927:hydroquinone
keywords: chemiluminescence; hydroquinone; luminol; sulphonato-(salen)manganese(III) complex