Methods for coating filter paper for solid-phase microextraction with luminescence detection and characterization of the coated filter paper by infrared spectrometry

Abstract

Methods were developed to coat Whatman No. 1 filter paper for the extraction of polycyclic aromatic hydrocarbons (PAHs) from water. The filter paper samples were coated using solutions of poly(hydrogenmethylsiloxane) and dichlorodimethylsilane. The coated paper samples were tested for extraction of polar aromatic compounds and polycyclic aromatic compounds from aqueous solutions. The extracted compounds were detected using solid-matrix fluorescence (SMF) and solid-matrix phosphorescence (SMP). Also, the limits of detection and effective partition coefficients for the compounds were calculated for the coated papers. The limits of detection and effective partition coefficients were compared to those obtained using 1PS paper as an extraction medium. Both coated filter paper samples were shown to be more effective than Whatman 1PS for extraction of polycyclic aromatic hydrocarbons. However, the paper treated with poly(hydrogenmethylsiloxane) gave the best extraction properties and a limit of detection of 29 fmol/ml for benzo[ e]pyrene. The paper coatings were characterized using near- and mid-infrared reflectance spectroscopy. In addition, 1PS paper was determined to contain 1.04 wt.% poly(dimethylsiloxane) (PDMS).