Determination of manganese in Chinese tea leaves by a catalytic kinetic spectrophotometric method.
The catalytic effect of manganese(II) on the oxidation of Rhodamine B with potassium periodate in the presence of 1,10-phenanthroline in acetic acid-sodium acetate was studied. A catalytic kinetic spectrophotometric method for determination of manganese(II) was developed. Manganese in the range 0.1-5.0 ng ml-1 can be determined, and the detection limit is 0.02 ng ml-1. Manganese in Chinese tea leaves was successfully determined.
Liu
R
R
Department of Chemistry, Liaocheng Teachers College, Shandong, China.
Zhang
A
A
Liu
D
D
Wang
S
S
D002384:Catalysis; D002681:China; D007700:Kinetics; D008345:Manganese / Q000032:analysis*; D013054:Spectrophotometry, Atomic; D013056:Spectrophotometry, Ultraviolet; D013662:Tea / Q000737:chemistry*
D013662:Tea; D008345:Manganese