Preconcentration of trace heavy metals in large aqueous samples by coprecipitation—flotation in a flow system
In a stream (0.5 1 min −1) of sample solution, trace heavy metals are quantitatively coprecipitated with indium hydroxide and floated with sodium oleate and nitrogen bubbles. Indium and the surfactant are removed by solvent extraction. Cadmium at the ng l −1 level in 20 l of water is concentrated 20...
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| Veröffentlicht in: | Analytica chimica acta 1983, Vol.148, p.305-309 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | In a stream (0.5 1 min
−1) of sample solution, trace heavy metals are quantitatively coprecipitated with indium hydroxide and floated with sodium oleate and nitrogen bubbles. Indium and the surfactant are removed by solvent extraction. Cadmium at the ng l
−1 level in 20 l of water is concentrated 2000-fold with recoveries of greater than 93%. |
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| ISSN: | 0003-2670 1873-4324 |
| DOI: | 10.1016/S0003-2670(00)85177-6 |