Abstract
We have previously proposed an atomic absorption spectrophotometric method for determination of total phosphorus in water. In this paper, the proposed method was applied to the rain water collected for a year (July 1984-June 1985) from three different locations : Kobe, Amagasaki and Miki. The concentrations of total nitrogen in the water samples were also determined by a conventional method as described in the Official Gazette. Kobe, Amagasaki and Miki, situated in the southern part of Hyogo prefecture in Japan, were chosen as representatives of residential, industrial and agricultural areas, respectively. The water samples from Miki contained significantly higher concentrations of total phosphorus than those from Kobe and Amagasaki, this might be due to fertilizer used in the agricultural area. In contrast, the concentrations of total nitrogen in the samples from Amagasaki were significantly higher than those from the other two locations, which suggested that the nitrogen in rain water might be derived from air pollution with nitrogen oxides owing to motor vehicles and factories in the industrial area.
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