Degradation of benzo[a]pyrene on glass slides and in food samples by low-pressure cold plasma
2019
Lee, Taehoon | Puligundla, Pradeep | Mok, Chulkyoon
Benzo[a]pyrene (BaP), a carcinogenic polycyclic aromatic hydrocarbon, is ubiquitous in nature, including smoked and grilled meats. BaP degradation has attracted attention due to its recalcitrant nature. In this study, low-pressure cold plasma (LPCP) was used to degrade BaP on glass slides and in food materials. The plasma discharges were generated using different working gases (air, N2, O2), at chamber pressures (0.1 - 5.0 Torr), and with plasma powers (72 - 168 W). Optimal BaP degradation was observed upon using LPCP with air as working gas (LPAP) at 1.0 Torr pressure and at 168 W power. Under these conditions, initial BaP concentration on slides was reduced maximally by 82.7% in 30 min. The degradation kinetics were well fitted by Weibull tail model compared with others. In food materials (roasted sesame and perilla seeds), the average levels of BaP degradation ranged between 40-46% following LPAP treatment for 30 min.
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