A screening method for detection of hexavalent chromium levels in soils
AUTOR(ES)
Franco, Débora V, Rodrigues, Maria Lucia Kolowski, Bavaresco, Jovana, Jardim, Wilson F
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2011
RESUMO
A rapid and low cost method to determine Cr(VI) in soils based upon alkaline metal extraction at room temperature is proposed as a semi-quantitative procedure to be performed in the field. A color comparison with standards with contents of Cr(VI) in the range of 10 to 150 mg kg-1 was used throughout. For the different types of soils studied, more than 75% of the fortified soluble Cr(VI) were recovered for all levels of spike tested for both the proposed and standard methods. Recoveries of 83 and 99% were obtained for the proposed and the standard methods, respectively, taking into account the analysis of a heavily contaminated soil sample.
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