Abstract
A universal method of microextraction preconcentration with the dispersion of the extractant was developed. The capillary collection of extracts with the density less than the water density was applied for the first time. It is shown that the concentration ratios of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) are great and make 27–210, and the limits of their gas chromatographic-mass spectrometric detection are at a level of 10–6−10−4 mg/L. The rapidity of the method is rather high; it is determined by the time of phase separation upon centrifugation, which is 5–8 min.
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