Effect on different temperatures to trace elements dissolution rate of green tea grown in Guizhou

Making tea at different water temperatures,leaching rates of trace elements of copper,iron,calcium and lead in three kinds of green tea planted in Guizhou were discussed in this paper with atomic absorption spectroscopy(AAS).The results showed that at different temperatures,dissolution rate of an element in certain kind of tea was variable,even for the same element in different kinds.And when human needs of trace elements were taken into consideration,the most appropriate temperatures were between 70℃～80℃.