Pant Astrid F, Dorn Julia, Reinelt Matthias
TUM School of Life Sciences Weihenstephan, Chair of Food Packaging Technology, Technical University of Munich, Freising, Germany.
Fraunhofer Institute for Process Engineering and Packaging IVV, Freising, Germany.
Front Chem. 2018 Nov 27;6:587. doi: 10.3389/fchem.2018.00587. eCollection 2018.
Gallic acid (GA) is a potential oxygen scavenger for food packaging applications. In this study we investigated the effect of temperature and relative humidity (RH) on the reaction kinetics of an oxygen scavenger consisting of GA and sodium carbonate. The reaction was described by a second-order kinetic law and the reaction rate coefficient as well as the scavenger capacity were determined from experimental data using a multiple-run downhill simplex method. Both the rate coefficient and the scavenger capacity increased significantly with higher temperatures. At 21°C it was shown that both the rate coefficient and the scavenger capacity increased significantly with higher RH. However, below 54% RH, there was no detectable reaction. For optimum scavenger performance we therefore recommend GA-based scavengers for packaging of food products with a high water activity stored at room temperature. Prior to application, the packaging materials with GA-based scavengers can be stored at 21°C and 54% RH without losing their scavenger activity. The results of this study provide the basis for the functional design of active packaging systems with GA-based oxygen scavengers.
没食子酸（GA）是一种可用于食品包装的潜在氧气清除剂。在本研究中，我们研究了温度和相对湿度（RH）对由GA和碳酸钠组成的氧气清除剂反应动力学的影响。该反应由二级动力学定律描述，反应速率系数和清除剂容量通过多次运行下山单纯形法从实验数据中确定。速率系数和清除剂容量均随温度升高而显著增加。在21°C时表明，速率系数和清除剂容量均随相对湿度升高而显著增加。然而，在相对湿度低于54%时，未检测到反应。因此，为了获得最佳的清除剂性能，我们推荐基于GA的清除剂用于室温下储存的高水分活度食品的包装。在应用之前，含有基于GA的清除剂的包装材料可在21°C和54%相对湿度下储存而不会丧失其清除剂活性。本研究结果为基于GA的氧气清除剂活性包装系统的功能设计提供了依据。
