Neutron Activation Analysis of Pineapple

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A rapid and sensitive method of the neutron activation analysis in pineapples is described. Younger stems contained the most Cl and Br than the other older stems. Analysis indicates that senescence is correlated with an increase in content of Br and Cl. The absorption of nutrient mineral ions by plants is a primary process by which essential atoms are abstracted from the inorganic environment and, thus is, as important as photosynthesis and nitrogen fixation in the elemental economy of the biosphere. The mineral elements are mostly obtained from the soil through the roots of plants. During the past few years, there has been an increasing realization of the importance of the trace element chemistry in biological systems. In this report, each amount of several elements in organs of a plant was determined. Though there are many methods of analysis for materials in organs of plants, a neutron activation analysis (NAA) without radio-chemical separations is an attractive one because of its simplicity, speed and sensitivity especially in Na, K, Ca, Mg, Mn and Al. In order to study the transports and redistributions of minerals among several organs of pineapple "Ananas comosus(L.)Merr. ", the tissues of the plant were analyzed by NAA with an atomic reactor of the Rikkyo (St. Paul's) University's TRIGA Mark II.
日本放射線影響学会の論文