Analysis of inorganic elements in tea [Camellia sinensis] leaves by the X-ray fluorescence microscope analyzer
2002
Sada, Y. (Shizuoka-ken. Tea Experiment Station, Kikugawa (Japan)) | Nishijima, T. | Morita, A. | Ohnishi Kameyama, M.
Inorganic elements in tea leaves (Camellia sinensis cv. Yabukita) were investigated using an X-ray fluorescence (XRF) microscope analyzer. The pixcel-intensitities from XRF images of potassium in new buds were higher than those in mature or immature leaves. The calcium content was higher in mature leaves than in immature leaves, especially in petiol. The distribution of the inorganic elements was changed by the infection of tea anthracnose (Colletotrichum theae-sinensis (MIYAKE) YAMAMOTO). While calcium was accumulated at the lesion point, potassium was decreased as the progress of disease. XRF microscope analyzer lead to simple, nondestructive and simultaneous element analysis in tea leaves. It will be useful for elucidation of response mechanism for physiological disorder or damage by disease and pest based on elements dynamics.
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