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Membrane pre-concentration methods coupled with hydroxide and sulfide precipitation/co-precipitation and X-ray fluorescence (XRF) detection have been developed for the determination of heavy metals (Fe, Ni, Mn, Cu, Zn, Pb) in coastal seawaters. The heavy metal ions in seawater samples can react with hydroxide or sulfide solution added to form hydroxide/sulfide precipitates. Then the precipitates containing...
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