| Abstract
| - Solid−liquid extraction room temperature phosphorimetryand pattern recognition are being proposed for screeningpolycyclic aromatic hydrocarbons (PAH) and polychlorinatedbiphenyls (PCB) in water samples. Both classes ofpollutants are extracted with the same membrane using asyringe kit, and their phosphorescence spectra arerecorded directly from the surface of the solid support.The entire experimental procedure takes less than 8 minper sample, and the limit of detection for 10 mL of water isat the parts-per-billion level. On the basis of the samplespectrum, pattern recognition is used to classify positivewater samples as containing PAH, PCB, or both. The feasibilityof this approach and its ability to avoid unnecessarychromatographic analysis of uncontaminated samples isdemonstrated with several complex mixtures and the analysisof heavily contaminated “real world” samples. Therecognition ability was 100%, while the prediction abilitywas close to perfect.
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