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Comparison of Quantitative Detection Methods Based on Molecular Fluorescence Spectroscopy and Chromatographic Techniques Used for the Determination of Bisphenol Compounds
Summary
This analytical chemistry paper developed and compared fluorescence spectroscopy-based methods to standard HPLC for detecting bisphenol compounds — including BPA, BPF, and BPS — in thermal paper and canned food. BPA and its substitutes are common in food contact plastics and coatings and leach into food. The new fluorescence methods were faster and cheaper than HPLC while still providing reliable quantification.
Analytical methods using the fluorescence properties of bisphenols (BPA, BPF and BPS) and their complexes with β-cyclodextrin and methyl-β-cyclodextrin were developed. The methods were applied for the analysis of thermal paper and canned food. Their performance was compared with a standard HPLC approach with a diode array and fluorescence detections. For comparison purposes, basic validation parameters (linear range, limit of detection, sensitivity, precision) were evaluated. It was concluded the developed methods facilitate fast and cost-effective determination of three bisphenol species in liquid samples, similar to the HPLC performance. They are also environmentally friendly. BPA, BPF and BPS can be routinely determined with the presented approach.