Solvent Effect on the Solid-Surface Fluorescence of Pyrene on Cellulose Diacetate Matrices

Abstract

The effect of the solvent nature (acetonitrile, ethanol, dimethyl sulfoxide, and dioxane) and its concentration on the fluorescence intensity of pyrene sorbed on the cellulose diacetate (CDA) film from a water-organic solution was studied. Dimethyl sulfoxide and ethanol are shown to be the most effective solvent additives for pyrene solid-surface fluorescence (SSF). The maximum SSF signal of pyrene was found upon sorption of the substance from aqueous media containing 1.2-4.2 vol% DMSO. For the pyrene quantitation the concentration dependence of its SSF intensity at the maximum of the spectrum at em = 394 nm and exp = 320 nm was plotted. The dependence has a linear character in the pyrene concentration range 2⋅10 −6 -2⋅10 −8 g/L, and the limit of pyrene detection is 2⋅10 −11 g/L. The possibility of determining benzo(a)pyrene using SSF technique with the CDA matrix is proved. The proposed method is promising for use in environmental monitoring of polycyclic aromatic hydrocarbons.

Applying of Chitosan-TiO2 Nanocomposites for Photocatalytic Degradation of Anthracene and Pyrene

“…were determined by luminescence analysis. For example, in the study [31], the PYRE concentration on solid matrices was determined using a calibration graph. The authors found that the dependence of the SPL intensity on the PAHs concentration on the solid matrix is linear up to CPAHs = 2 × 10 -8 g/l.…”