Determination of manganese in Chinese tea leaves by a catalytic kinetic spectrophotometric method

Abstract

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.