Abstract
The correlations of the fluorine amount in between the environmental air (by alkaline tripped paper method) and the leaves of gladiolus and rice plant (by alizarin-complexone absorption spectrophotometry) in the Toyama-Shinko area (Shinminato city, Toyama prefecture), during 9 years from 1971 to 1979 are shown. In this area, fluoride pollution was rather slight. Regression equation was given as follows for gladiolus and rice plant, respectively, [numerical formula] in which, x is aggregated fluorine in alkaline treated papers during exposing period shown as μg/dm2/months, and y is fluorine content in plant shown as ppm. And, three monitoring steps are proposed in the area slightly polluted with fluorine. 1) Need not the air monitoring at the point detecting no fluorine by alkaline tripped paper method for succeeding 5 years. 2) Better to monitor by alkaline tripped paper method at the point under 20 ppm fluorine in gladiolus leaves. 3) Monitoring by alkaline tripped paper method and analysis of fluorine in the leaves are necessary at the point over 20 ppm fluorine in gladiolus leaves.
