Study on the chemical form and extractio rate of trace elements in Burdock tea

Objective:To detect diffference of the extractio rate of trace elements in Burdock tea under different experimental conditions by content of determination.Methods An atomic absorption spectrometry was used to measure the quantity of six trace elements in Burdock tea and samples,dealed with different water temperature,time,frequency,purification and digestion,to compare extractio rate and chemical form of different trace elements.Results:Burdock tea contained rich trace elements,the soluble rates of six trace elements ranked as the following:calcium strontium manganese zinc copperiron.the extraction rates were closely related to soaking water temperature,time,frequency,moreover,they were related to chemical form of elements existence.Conclusion:Taking into account the content and extraction rate of trace elements.Burdock tea is a good health food supplement resource and worthy of development and utilization.