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 and 0.1 mol L) were used to get the optimum SDS concentration for maximum quenching and best detection and quantification limits. Lower SDS concentration (0.05 mol L) 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 × 10 - 0.020 × 10 mol L. 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 to 4.55 × 10 mol L and QL varied from 1.51 × 10 to 1.52 × 10 mol L. Method showed excellent reproducibility and is fruitful for the studied amines in environmental samples.