Selective Extraction of Trace Levels of Polychlorinated and Polybrominated Contaminants by Supercritical Fluid-Solid-Phase Microextraction and Determination by Gas Chromatography/Mass Spectrometry. Application to Aquaculture Fish Feed and Cultured Marine - Rodil, R.; Carro, A. M.; Lorenzo, R. A. (Analytical Chemistry, 2005)