Abstract
Bisphenol A (BPA) is one of the chemicals used to produce both polycarbonate plastics and epoxy resin coatings. Research has shown that small amounts of BPA can migrate into the foods and beverages enclosed in these types of containers. In this research, an analytical method based on high-performance liquid chromatography with fluorescence detection (HPLC-FLD) was developed and validated for the determination of BPA in canned vegetables. The results were confirmed by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) was performed, to identify the coating material of each tin can. Nineteen cans of vegetables were taken as study samples (eleven samples from the Spanish market, and eight samples from the Portuguese market). Excellent linear correlation (r2 = 0.9999) was observed over the range of 0.01 to 0.25 mg/L. Limit of detection (LOD) and limit of quantification (LOQ) values were calculated to be 0.005 mg/kg and 0.01 mg/kg, respectively. Good recoveries, between 72% and 90% were obtained at three different levels of concentration (RSD% = 4.6). BPA was not detected in the samples. The proposed HPLC-FLD was found to be suitable for the determination of BPA in canned vegetables.
Highlights
People are exposed to contaminants through several sources
Standard Bisphenol A (BPA; 2,2-bis(4-hydroxyphenyl)propane; 4,4’-isopropylidene-diphenol), with a purity >99% was acquired from Aldrich-Chemie (Steinheim, Germany)
Repeatability was always lower than 3.48%, except at 0.01 mg kg−1, which was 9.94%, and intermediate precision was always lower than 4.70%, indicating good precision
Summary
Packaging can be a potential source of contamination through the migration of substances from the packaging material into the food [1]. This fact is especially relevant, as most of the food found at the supermarkets is packaged in order to prevent its deterioration and to extend its shelf life [1,2,3] In order to ensure food safety, the monitoring of migration from food contact materials has become a priority issue. The study of the contaminant bisphenol A (BPA) and its impact on the endocrine system are of major concern, because BPA exhibits estrogenic properties arising from its structural resemblance to the human.
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