Abstract
The content and composition of the elements of the Pentaphylloides fruticosa vegetable samples have been first studied by the method of X-ray fluorescence analysis, using synchrotron radiation from the VEPP-3 storage ring (SRXRF method), in connection with storage periods. It has been established that the element composition of the P. fruticosa samples, analyzed just after sampling, and that of the samples, stored for 10 years, were almost the same. Most stable are the concentrations of K, Ca, Mn, Fe, Co, Cu, Zn, and Sr. The content of Br in the long-stored samples decreased 2-4 times as compared with that of the freshly collected samples.
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