Pyrene Interaction with Selected Amines in Aqueous Sodium Dodecyl Sulphate (SDS)

Pyrene interaction with a group of selected amines such as i.e. benzylamine, phenethylamine, trimethylamine, 1-phenylethylamine was studied in aqueous sodium dodecyl sulfate. All the four amines quenched the fluorescence intensity of pyrene in aqueous SDS. Pyrene acts as a sensitive and selective sensor for the detection of amines in environmental samples. Two different SDS concentrations (0.05 mol L^- 1 and 0.1 mol L^- 1) were used to get the optimum SDS concentration for maximum quenching and best detection and quantification limits. Lower SDS concentration (0.05 mol L^- 1) was found the optimum for maximum quenching, lower detection and quantification limits. Fluorescence quenching of pyrene by the studied amines was treated with the Stern-Volmer equation that resulted in a Stern-Volmer constants (Ksv). Ksv reflects the sensitivity of pyrene for studied amines. Ksv varied between 1.962 × 10⁴ - 0.020 × 10³ mol L^- 1. A sensitivity, detection limit (DL), quantification limit (QL) of pyrene for studied amines was found in the order Benzylamine > phenethylamie > trimethylamine > 1-phenylethylamine. DL varied from 4.53 × 10^- 7 to 4.55 × 10^- 4 mol L^- 1 and QL varied from 1.51 × 10^- 6 to 1.52 × 10^- 3 mol L^- 1. Method showed excellent reproducibility and is fruitful for the studied amines in environmental samples.