Open AccessOptimization and validation of solid-liquid extraction and purification at low temperature of PAHs in sewage sludge
Author(s) -
Érica Soares Barbosa,
Gabriela Fonseca Evangelista,
Emanuella Mesquita Pimenta,
Flaviano Oliveira Silvério,
Gevany Paulino de Pinho
Publication year - 2014
Publication title -
química nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.214
H-Index - 73
eISSN - 1678-7064
pISSN - 0100-4042
DOI - 10.5935/0100-4042.20140068
Subject(s) - extraction (chemistry) , sewage sludge , solid phase extraction , environmental science , sewage , waste management , chromatography , pulp and paper industry , chemistry , environmental engineering , engineering
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