Evaluation of absorption kinetics of oxygen scavenger sachets using response surface methodology

Abstract

SUMMARYThe performance of oxygen scavengers can be infl uenced by several conditions, such as temperature (T) and relative humidity (RH), which are considered to be the two major factors. Therefore, the development of new scavengers requires the study of their performance, with these conditions varied. In this paper, the response surface methodology (RSM) was used to study the performance of a newly developed oxygen scavenger sachet and to model the infl uences of T and RH and their interaction on the absorption capacity and rate constant of the developed sachet. Commercial oxygen scavenger sachets were used for comparison purposes. The oxygen absorption capacity and rate constant were evaluated with a 2 2 factorial design with a central point. The results showed that each absorber sachet presented a different behaviour and there were signifi cant interactions between T and RH; so, the RSM was the most appropriate for these studies. The developed sachet presented a better performance compared with the commercial ones at 23°C and 53% RH, which represents the condition for commercialization at room temperature of foods of intermediary water activity, while in the extreme conditions (100% RH and 37°C) all sachets present a similar absorption capacity.

Active Packaging Applications for Food

“…The oxygen‐scavenging mechanism is mostly chemical. Most common are iron‐based scavengers (Miltz and Perry ; Galotto and others ; Braga and others ; Gibis and Rieblinger ; Polyakov and Miltz ), of which the OS activity is triggered by moisture so that the reduced iron is irreversibly oxidized to a stable ferric oxide trihydrate complex (Solovyov ). In contrast, other applied metals, such as cobalt (Galdi and others ; Damaj and others ), act as a catalyst for the oxidation of polymers, or palladium (Yildirim and others ), that catalyzes the oxidation of hydrogen into water.…”

Development of an Active Film With Natural Zeolite as Ethylene Scavenger

“…In this study kinetic model pseudo-first order was used to predict the sorption behavior of the data 14,15) . [5] where q e (µL g -1 ) and q t (µL g -1 ) are the amount of ethylene adsorbed by aluminosilicate at equilibrium conditions, and at time (t), respectively.…”

Advances in the packaging of fresh and processed meat products

“…Heat from the exothermic reaction of O 2 absorption results in a decrease in the amount of water adsorbed on the corrosion products (Polyakov and Miltz, 2010). An experimental sachet using iron powder and synthetic zeolite in a microperforated film had improved O 2 absorption over commercial sachets at 23°C, but not at 37°C (Braga et al ., 2010). Benzyl acrylate, ascorbates, sulfur dioxide and other O 2 -binding compounds imbedded into packaging materials are being tested (Brody, 2010a).…”