Extraction techniques and clean-up procedures for the determination of pahs in sediments of the Ceará coast

Química Nova

Correia, Leandro M.¹  Cavalcante, Rivelino M.¹  Universidade de São Paulo, São Carlos, Brasil¹  Nascimento, Ronaldo F.¹  Freire, George S. S.¹  Viana, Rommel B.¹  Universidade Federal do Ceará, Fortaleza, Brasil¹  Lima, Danielle M. de¹  Silveira, Edilberto R.¹ 

关键词: extraction technique;    sediment;    PAHs.;   

DOI  :  10.1590/S0100-40422008000600019

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Extraction and clean-up are essential points in polycyclic aromatic hydrocarbon (PAHs) analysis in a solid matrix. This work compares extraction techniques and clean-up procedures for PAH analysis. PAH levels, their toxicological significance and source were also evaluated in the waters of the Cocó and Ceará rivers. The efficiency of PAH recovery was higher for the soxhlet and ultrasonic techniques. PAH recovery varied from 69.3 to 99.3%. Total PAH concentration (ΣHPA) varied from 720.73 to 2234.76 µg kg-1 (Cocó river) and 96.4 to 1859.21 µg kg-1 (Ceará river). The main PAH sources are pyrolytic processes and the levels were classified as medium so that adverse effects are possible.

【 授权许可】

Unknown