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应用火焰光度、原子荧光和ＩＣＰ法首次测定签茎、枝中２８种无机元素的含量，其中１５种人体必需宏、微量元素含量和：茎＞枝；４种有害微量元素含量均未超过国家药典限定范围。
The contents of 28 kinds of inorganic elements in stems and shoots of signed stems were determined by flame photometry, atomic fluorescence spectrometry and ICP method. Among them, the contents of essential macro and trace elements and the stems and branches of 15 kinds of human bodies did not exceed the national pharmacopoeia Limited range.