| The method for determining hexavalent chromium in soils was improved at steps of separation and extraction by flame atomic absorption spectrometry. The trivalent chromium and hexavalent chromium were effectively separated by using aluminum polychlorid as flocculating agent, isopentyl alcohol as extracting agent for reducing the test interference. Considering detective effects by dosage of aluminum polychlorid and oscillation time of extracted liquid, the improved method could be used to determine hexavalent chromium in soils after comparison of EPA 3060A method and not improved method of flame atomic absorption spectrometry. |
