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

• Published in: International journal of optics 2018-01, Vol.2018 (2018), p.1-6
• Main Authors: Gubina, Tamara I., Otradnova, Milena I., Volkova, Elena V., Rogacheva, Svetlana M., Shipovskaya, A. B.
• Format: Article
• Language: English
• Subjects: Acetonitrile; Additives; Cellulose acetate; Cellulose diacetate; Dependence; Dimethyl sulfoxide; Efficiency; Environmental monitoring; Ethanol; Fluorescence; Methods; Nanoparticles; Physical chemistry; Polycyclic aromatic hydrocarbons; Solid surfaces; Solvent effect; Sorbents; Sulfoxides
• ISSN: 1687-9384; 1687-9392
• DOI: 10.1155/2018/3012081

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 λem = 394 nm and λexp = 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.