Acid Rain Data at Yokohama, Japan (Apr. 2003-Aug. 2004)

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  • 横浜で観測された酸性雨(2003年4月～2004年8月)

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Rain samples were collected adequately at the center of Yokohama city from April 2003 to August 2004. Total numbers of samples were 214. pH values and electric conductivity (E.G.) were measured immediately after catched samples and then chemical species were analyzed. This report is contained all observed data. Frequency of acid rain(pH<5.6) were 93% of all collected samples. Analytical methods were as follows: Cl~,N0_3~,S0_4^<2->: Ion chromatography. NH_4^+: Indophenol blue colorimetry. Na,K,Mg,Ca: Atomic absorption spectrophotometry. This study was carried out at the laboratory of Yokohama National University. Original charts of ion chromatography and atomic absorption spectrophotometry are deposited at the Department of Science Education, Faculty of Education and Human Sciences.

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