Otimização e validação da extração sólido-líquido e purificação em baixa temperatura de HPAs em lodo de esgoto

In this study, a method of solid-liquid extraction and purification at low temperature (SLE-PLT) to determine 16 polycyclic aromatic hydrocarbons (PAHs) in sewage sludge was optimized and validated. The analyses were performed by HPLC-UV. The extraction phase, homogenization procedure, influence of pH, ionic strength and clean-up of the extracts were optimized. Recoveries were higher than 63.4% for 11 PAHs. The correlation coefficients were greater than 0.99 and limits of detection and quantitation were less than 0.060 and 0.15 µg g-1, respectively. These values were lower than the maximum residue limits of PAHs established by European legislation. SLE-PLT proved a more practical, economical method with fewer steps compared to Soxhlet extraction (reference method) for PAHs in sewage sludge.

Bibliographic Details

Main Authors:	Barbosa,Érica Soares, Evangelista,Gabriela Fonseca, Pimenta,Emanuella Mesquita, Silvério,Flaviano Oliveira, Pinho,Gevany Paulino de
Format:	Digital revista
Language:	Portuguese
Published:	Sociedade Brasileira de Química 2014
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422014000300004
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