Determination of bisphenol A and nonylphenol in food packaging material by high performance liquid chromatography-tandem mass spectrometry

Abstract

Objective： A method based on high-performance liquid chromatography-mass spectrometry was developed for the simultaneous determination of bisphenol A and nonylphenol in food packaging material. Methods: The extraction solvent and extraction method were investigated. Solid-phase extraction （SPE） conditions were optimized. The effects of solid phase extraction column, loading solvent, eluting solvent and elution solvent on the purification effect were systematically analyzed. The samples were ultrasonic extracted with dichloromethaneand cleaned up on a solid-phase extraction （SPE） cartridge equipped with packing material of silicone. The separation was performed on a Venusil MP C18（2）（100 mm×2.1 mm,2.6 μm）by gradient elution with 0.1% ammonia solution and methanol as mobile phase. The analytes were determined with multiple reaction monitoring （MRM） mode under electrospray negative ionization mode and quantified by an internal standard method. Results: The results indicated that good linearities was obtained for bisphenol A and nonylphenol both within the concentration range of 1.0~200.0 μg/L. The average recoveries of each analyte at three spiked levels of 1.0, 10.0, 200.0 μg/kg were in the range of 89.2%~101.2%, with relative standard deviations （RSD） of 3.1%~6.2%. The limits of detection （LODs） and limits of quantification （LOQs） were 0.5 μg/kg and 1.0 μg/kg, respectively. Conclusion: The method was proved to be a simple, accurate and sensitive method and was successfully applied to detect bisphenol A and nonylphenol in food packaging material. It can also provide reference for the determination of bisphenol A and nonylphenol in food.

Keywords

• high-performance liquid chromatography-mass spectrometry
• solid-phase extraction
• bisphenol a
• nonylphenol
• food packaging material
• plastic