生物・岩石および金属における元素組成の規則性

海産生物の放射化分析 (第2報)

抄録

The elemental constitution of organisms, rocks and metals was found to have linear relations to that of the earth crust.Logarithms of the ratios of sample concentration to those of seawater were used as ordinate, Y=log (C_SA/C_WA), and those of the earth crust as abscissa, X=log (C_EC/C_SW).Regression lines, Y=A+BX, describe “omnipresence of elements” semiquantitatively.These samples were classined into 3 groups according to the inclination of the regression lines, B: i) B=1 (0.8 to 1.02);rocks, oxides, carbonate, phosphate, coal, ii) B=0.5 (0.4 to 0.7);organisms, metals, river water, petroleum, iii) B=0;seawater.The author used two parallel lines to the regression line instead of curves which were used usually, to express the 90% confidence interval. The elemental constitution of the samples composed of cells: microorganisms, plants, animals, muscle, bone, liver, was described by only one regression line.The inclination of regression lines changed in line with chemical reactions;e.g.values of B were decreased as much as 1 or 0.5 by dissolution, where seawater or river water formed from rocks, decreased ca by 0.5 by metal formation from oxide, and they were incresed by 1 or 0.5 by precipitation, where sediments or organisms formed from seawater.