[Study on the synergistic coloration of tin (II) with pyrocatechol violet and rhodamine B and its application].
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.
Liu
W
W
Dept. of Chemical Engineering, Huaihai Institute of Technology, 222005 Lianyungang.
Ma
W
W
Qian
B
B
Zhang
M
M
D001557:Benzenesulfonates / Q000737:chemistry*; D003116:Color; D018857:Food Packaging / Q000295:instrumentation*; D057141:Food, Preserved / Q000032:analysis; D012235:Rhodamines / Q000032:analysis*; D014001:Tin / Q000032:analysis*
D001557:Benzenesulfonates; D012235:Rhodamines; C009134:pyrocatechol violet; D014001:Tin; C029773:rhodamine B