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Química Nova

Print version ISSN 0100-4042


FRANCO, Débora V; RODRIGUES, Maria Lucia Kolowski; BAVARESCO, Jovana  and  JARDIM, Wilson F. A screening method for detection of hexavalent chromium levels in soils. Quím. Nova [online]. 2011, vol.34, n.7, pp.1255-1259. ISSN 0100-4042.

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.

Keywords : hexavalent chromium; screening methods; soil.

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