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flotation of traces of heavy metals coprecipitated with aluminum hydroxide from water and sea water - sciencedirect

flotation of traces of heavy metals coprecipitated with aluminum hydroxide from water and sea water - sciencedirect

Microgram quantities of heavy metals in 1-l samples of water and sea water are quantitatively coprecipitated with aluminum hydroxide at pH 9.5. The precipitate is floated with the aid of sodium oleate and small nitrogen bubbles, separated and dissolved in 2 M nitric acid, and the heavy metals are determined by atomic-absorption spectrometry. The method is rapid and applicable to 9 heavy metals at the low p.p.b. level.

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