Avaliação de solventes de extração por ultrassom usando-se cromatografia líquida de alta eficiência para a determinação de hidrocarbonetos policíclicos aromáticos em solos contaminados

Química Nova

Jussara Aparecida Oliveira Cotta¹  Maria Olímpia Oliveira Rezende¹  Maria Diva Landgraf¹ 

[1] ,Universidade de São Paulo Instituto de Química de São Carlos São Carlos SP ,Brasil

关键词: ultrasound extraction;    solvent extraction;    contaminated soils;   

DOI  :  10.1590/S0100-40422009000800009

来源: SciELO

【 摘 要 】

A method using ultrasonication extraction for the determination of 17 polycyclic aromatic hydrocarbons (PAHs), selected by the USEPA and NIOSH as "consent decree" priority pollutants, in soil by High Performance Liquid Chromatography (HPLC) was studied. Separation and detection were completed in 20 min with a C18 columm, acetonitrile-water gradient elution and ultraviolet absorption and fluorescence detections. The detection limits, for a 10 µL of solution injection, were less than 9,917 ng/g in UV detection and less than 1,866 ng/g in fluorescence detection. Several organic solvents were tested for extraction of the 17 PAHs from soils. Acetone was the best solvent among the three solvents tested, and the order of the extraction efficiencies was: acetone>methanol>acetonitrile. Ultrasonication using acetone as solvent extraction was used to evaluate the biodegradation of those compounds in contaminated soil during a vermicomposting process.

【 授权许可】

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