Speciation of manganese in tea leaves and tea infusions

A speciation scheme was developed for identification of the chemical forms of manganese in tea leaves and tea infusions. The range of manganese in five different groups of tea leaves was found as 1107–2205 μg g−1 on dry basis. It was noted that 30.0% of Mn was passed into the water that was present in the form of Mn(II), and also 2.5% of Mn was distributed in the total organic bound and was passed into the various solvents.