Development of a Capsule Phase Microextraction Protocol for the Determination of Monomers Released from Dental Resins in Cola Drinks Analyzed by High-Pressure Liquid Chromatography Coupled to UV.

A novel, simple capsule phase microextraction combined with high-pressure liquid chromatography coupled with ultraviolet detection analytical method was developed for the simultaneous determination of organic monomers that can be released from dental resins [bisphenol-A (BPA), bisphenol A glycerolatedimethacrylate (Bis-GMA), triethylene glycol dimethacrylate (TEGDMA), and urethane dimethacrylate (UDMA)] in cola drinks. The critical parameters that affect the extraction, such as the selection of the capsule type and size, extraction time, type, and volume of elution solvent, stirring rate during the extraction, and desorption time, were optimized. The method was subsequently validated in terms of selectivity, linearity, accuracy, precision, and robustness and showed satisfactory results. The limits of detection and quantitation were equal to 0.06 and 0.2 ng/µL, respectively, and the recoveries ranged between 93.3% and 106.9%. The method was employed in the determination of monomers released from cola drinks. For this purpose, cola refreshments were incubated with dental resins for 24 h and 7 days, and the proposed method was successfully used for monitoring the release in cola samples.