Inactivation of Palladium-based Oxygen Scavenger System by Volatile Sulfur Compounds Present in the Headspace of Packaged Food

摘要: An oxygen scavenger based on a catalytic system with palladium (CSP) was recently developed to remove in food packagings. Although the CSP worked various types of food, some foods, an inhibition observed. Because such systems are susceptible poisoning by sulfur-containing compounds, aim this study understand inactivation palladium-based catalysts presence foods containing volatile sulfur compounds (VSCs). To achieve this, scavenging activity (OSA) evaluated selected products. Afterwards, VSCs mainly present these were exposed CSP, and influence OSA evaluated. Finally, headspace analysis performed diluted packaged products using proton transfer reaction time-of-flight mass spectrometry. It found that inhibited when concentrations ranging between 10.8–36.0 ppbv (dimethyl sulfide, DMS), 1.2–7.2 ppbv disulfide), 0.7–0.9 ppbv trisulfide), 2.1–5.8 ppbv (methional) 4.6–24.5 ppbv (furfuryl thiol). concluded roast beef cheese, DMS may be compound responsible for CSP. In packagings ham, key hydrogen sulfide methanethiol; peanuts, it par-baked buns, accumulation methional, DMS, butanethiol methionol. When potato chips packaged, demonstrated low concentrations, can still scavenged at reduced OSA.