AI Article Synopsis
- A new method was developed to measure 21 different polychlorinated biphenyl (PCB) metabolites in animal-based foods using a green solvent technique called deep eutectic solvent (DES) based microextraction combined with advanced gas chromatography.
- The method optimized important parameters like the type and amount of DES used, achieving effective results with detection limits as low as 0.12 ng/mL and recovery rates between 80.1-111.4%.
- Applied to real-world samples (like milk, meat, fish, and eggs), the analysis found PCB metabolite levels ranging from 0.64 to 32.14 ng/g, marking a significant advancement in routine food safety testing.
Article Abstract
An analytical method was developed for the quantitative determination of 21 polychlorinated biphenyls (PCBs) metabolites (17 were -OH, 1 -MeO, and 3 were MeSO) in foods of animal origin using deep eutectic solvent (DES) based dispersive liquid-liquid microextraction followed by injector port silylation-gas chromatography-tandem mass spectrometry. The type of DES (thymol: camphor, 1:1 molar ratio) and optimum volume of DES (300 µL), pH (7.0), and disperser solvent (acetonitrile) were optimized to attain the maximum extraction efficiency. The limit of detection, limit of quantification, and percent recovery were found to be in the range of 0.12-0.23 ng/mL, 0.40-0.76 ng/mL, and 80.1-111.4%, respectively. The expanded uncertainty was observed to be in the range of 7.2-22.8% for the targeted analytes. The proposed method was applied to real food samples (milk, meat, fish, and egg) and the levels were found to be in the range of 0.64-32.14 ng/g. This is first of its kind method using green solvent based method for the analysis of PCB metabolites (-OH, MeO, and MeSO) and will find extensive application in routine testing for foods of animal origin.
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| http://dx.doi.org/10.1016/j.chroma.2023.464338 | DOI Listing |
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