Speciation of manganese in tea leaves and tea infusions

摘要

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 dif- ferent groups of tea leaves was found as 1107-2205 μg g~-1 on dry basis. It was noted that 30.0/100 of Mn was passed into the water that was present in the form of Mn(Ⅱ), and also 2.5/100 of Mn was distributed in the total organic bound and was Passed into the various solvents.