SOLID-PHASE MICROEXTRACTION WITH WHATMAN 1PS PAPER AND DIRECT ROOM-TEMPERATURE SOLID-MATRIX LUMINESCENCE ANALYSIS

Solid-phase microextraction has been combined with solid-matrix lumine scence for the detection of a variety of compounds at sub-nanogram lev els for the first time. Whatman 1PS paper was placed in water solution s of polar and nonpolar compounds for the selective removal of the non polar compounds such as benzo(a)pyrene. Distribution constants were ob tained for 4-phenylphenol, benzo(f)quinoline, benzo(h)quinoline, phena nthrene, and benzo(a)pyrene. The distribution constants showed that ph enanthrene and benzo(a)pyrene in water had a very strong affinity for the 1PS paper. Once the solutes were extracted for a fixed period of t ime, the 1PS paper was dried, and either the solid-matrix fluorescence or solid-matrix phosphorescence was detected from the adsorbed lumiph ors by using the appropriate excitation wavelengths. It was a simple m atter to detect at least three adsorbed compounds on the 1PS paper by solid-matrix luminescence. Benzo(a)pyrene was easily detected at a lev el of 0.02 ng ml(-1) in water. (C) 1998 Elsevier Science B.V.