Nonionic surfactant mixtures: a new cloud-point extraction approach for the determination of PAHs in seawater using HPLC with fluorimetric detection [An article from: Analytica Chimica Acta]

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Description:
This work proposes the use of nonionic surfactant mixtures (polyoxyethylene-10-lauryl ether ''POLE'' with Triton X-114 and Brij 30) in order to modify and control the cloud-point temperature required to extract and preconcentrate polycyclic aromatic hydrocarbons (PAHs) from seawater samples. The optimized cloud-point method using the mixture POLE/Brij 30 followed by HPLC with fluorimetric detection allows to determine 13 PAHs from seawater (detection limits up to 23ng/l and an average total RSD of 9.2%). The validation is achieved using a well-established extraction method and GC-MS.