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Articles • J. Braz. Chem. Soc. 21 (2) • 2010 • https://doi.org/10.1590/S0103-50532010000200016 linkcopy

Open-access DDT in fishes and soils of lakes from brazilian Amazon: case study of puruzinho lake (Amazon, Brazil)

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    Abstract

    DDT concentrations had been quantified in fishes and at 20 points along the "Puruzinho" lake. The determination of pollutants in the samples consisted in four consecutive steps: extraction, clean-up, fractionation and automatic injection in high resolution gas chromatography coupled to an electron capture detector. The ΣDDT results in fishes (ng g-1 dry weight) ranged from 0.3 to 71.4. The concentrations of ΣDDT on house soils varied from 2.0 to 55.4 ng.g-1 while forest soils the obtained values were between 1.6 e 13.3 ng g-1. The Shapiro-Wilk test showed that the distribution was not normal for both the results of the soil of the houses (p < 0.001) as well as for the forest soils (p < 0.007). The U test of Mann-Whitney reveled that there were no significant difference between the results obtained for both houses and forest soils (p > 0.290).

    DDT; metabolites; fishes; soils; Amazon

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