Evaluation of solvent extraction by ultrasound by using high performance liquid chromatography for the determination of polycyclic aromatic hydrocarbons in contaminated soils

Química Nova

Landgraf, Maria Diva¹  Rezende, Maria Olímpia Oliveira¹  Universidade de São Paulo, São Carlos, Brasil¹  Cotta, Jussara Aparecida Oliveira¹ 

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

DOI  :  10.1590/S0100-40422009000800009

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown