用热水浸泡法从粗老茶叶中提取茶叶多糖,在碱性条件下,茶叶多糖水溶液与三氯化铁反应合成茶叶多糖铁配合物（TPC）,并用邻菲罗啉分光光度法和原子吸收光谱法测定TPC中铁(Ⅲ)的含量。实验结果表明：TPC是深棕红色无定型粉末, 易溶于水,在pH值3~12范围内不沉淀,不水解。TPC中铁(Ⅲ)的含量：邻菲罗啉分光光度法测定结果为20.71%,原子吸收光谱法测定结果为20.13%。
Tea polysaccharide was abstracted with warm water, tea polysaccharide-Fe（Ⅲ）complex(TPC) was synthesized with tea polysaccharide and FeCl3 under the alkaline condition, The determination of Fe（Ⅲ） was conducted with the method of ferroin-Fe（Ⅱ） and atomic absorption spectrophometry. The results showed that: TPC is heavy brownish red and shapeless powder. It can dissolve in water, its solution is very stable at the pH from 3 to 12. Content of Fe（Ⅲ）in TPC is 20.71% by the method of ferroin- Fe（Ⅱ）and 20.13% by the method of atomic absorption.
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