title: [Study on the synergistic coloration of tin (II) with pyrocatechol violet and rhodamine B and its application].
abstract: In the presence of PVA, a sensitive color reaction of tin (I ) on pyrocatechol violet and rhodamine B has been studied. In a NaAc-HAc (pH = 5.0) medium, tin(II) ions form an ions-associate complex with pyrocatechol violet and rhodamine B. The composition of the complex is Sn (II): PV : RhB = 1 : 2: 4. The maximum absorption of the ions-associate complex is at 560 nm with an apparent molar absorptivity of 1.18 x 10(5) L x mol(-1) x cm(-1). Beer's law is obeyed in the range of 0-15 microg/25 mL of tin. The method is highly selective and has been applied to the determination of trace tin in some objects with satisfactory results.
authors.affiliation: Dept. of Chemical Engineering, Huaihai Institute of Technology, 222005 Lianyungang.
authors.forename: W
authors.initials: W
authors.lastname: Liu
authors.forename: W
authors.initials: W
authors.lastname: Ma
authors.forename: B
authors.initials: B
authors.lastname: Qian
authors.forename: M
authors.initials: M
authors.lastname: Zhang
mesh_terms: D001557:Benzenesulfonates / Q000737:chemistry*; D003116:Color; D018857:Food Packaging / Q000295:instrumentation*; D057141:Food, Preserved / Q000032:analysis; D012235:Rhodamines / Q000032:analysis*; D014001:Tin / Q000032:analysis*
chemical_list: D001557:Benzenesulfonates; D012235:Rhodamines; C009134:pyrocatechol violet; D014001:Tin; C029773:rhodamine B