Content and Dissolved Rate of Inorganic Nutrimental Elements in Lotus Leaves

The contents of seven inorganic nutrimental elements in Lotus leaves of different growing periods or of different collecting time as well as in the boiled-water extract,water decoction were determined by using flame atomic absorption spectrometry.The results show the contents of above-mentioned seven nutrimental elements have remarkable difference in Lotus leaves of different growing periods in spite of their rich contents of Mn,Fe,Zn and Cu in common.Lotus leaves has a significant accumulation of Mn.The content of Mn from Lotus leaves collected in October reaches 1 278.76μg/g.The dissolved rate orderly reduces as follows:KZnMgCuMnFeCa,which mainly depends on the existing chemical states in medicinal herbs.