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Studies on precipitation chemistry were carried out from April to October in 2008 at three non-urban sites in North China. A total of 122 rainwater samples were collected, and all the samples were analyzed for pH, EC and major ions (F−, Cl−, NO3−, SO42−, K+, Na+, Ca2+, Mg2+, and NH4+). The predominant ions in the precipitation were SO42−, NO3− and Ca2+ at all sampling...
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