Lead in tea plant is mainly in the form of oxalic acid lead . phosphoric acid hydrogen lead (PbHPO4) and phosphoric acid lead( Pb3(P04 )2) , and some acid hydrogen lead and so on .

• 茶树体内铅主要以草酸铅和磷酸氢铅、磷酸铅等难溶于水的磷酸盐的形态存在，其次为果胶酸铅、与蛋白质呈结合态或吸附态的铅，依次为水溶性有机酸铅和磷酸铅、硝酸铅和氯化铅为主的无机物及氨基酸铅。