LAUSR

The environmental contaminant bisphenol S (BPS) was determined by a kinetic fluorimetric method combined with Fenton process in the presence of rhodamine B (RhB). In acidic solution, the fluorescent RhB was oxidized by hydroxyl radical generated in Fenton process and produced fluorescence quenching, which was obviously accelerated by BPS added into the system. The decrease in fluorescence intensity (ΔF) was proportional to the concentration of BPS with the maximum excitation and emission wavelengths of 554 nm and 578 nm, respectively. Under the optimal conditions, the ΔF was good linear with the concentration of BPS over the range of 0.004–2.0 mg/L with a correlation coefficient of 0.9991. The detection limit of 0.73 μg/L was obtained for the determination of BPS by the proposed method. The general coexisting substances did not interfere to the reactions of BPS with Fenton reagent and RhB. The proposed method has been successfully applied to determine BPS migrated from plastic package with satisfactory results. This new method is environmentally friendly and easy to popularize.