title: Shelf life of powdered Campomanesia adamantium pulp in controlled environments.
abstract: The objective of this study was to evaluate the shelf life of powdered guavira pulp obtained by a foam mat drying process. The dehydrated guavira pulp was packed into low density polyethylene (LDPE) bags and stored under two controlled conditions: environmental (25°C, RH 75%) and accelerated (35°C, RH 90%) for 90 days. The shelf life was accompanied by carrying out the following analyses every 10 days: moisture content, water activity, vitamin C content, pH and titratable acidity. Vitamin C was the quality attribute used to determine the shelf life of the product, by determining its degradation kinetics as a function of storage time. The linear regression data showed that the vitamin C degradation reaction fitted the zero and first order kinetic models. The shelf life of the powdered guavira pulp under environmental conditions was approximately 49 days, and under accelerated conditions (35°C) 45 days. The Q10 was equal to 1.09, predicting a shelf life similar to that found under environmental conditions. The moisture content for these conditions was 10.0% e 5.4% for 35°C and 25°C, respectively. The above demonstrate the efficiency of the accelerated test in predicting the shelf life of the product.
authors.affiliation: Universidade Federal da Grande Dourados, PO Box 533, 79804-070 Dourados-MS, Brazil.
authors.forename: Caroline A
authors.initials: CA
authors.lastname: Breda
authors.forename: Eliana J
authors.initials: EJ
authors.lastname: Sanjinez-Argandoña
authors.forename: Camila de A C
authors.initials: Cde A
authors.lastname: Correia
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis; D004780:Environment, Controlled; D018857:Food Packaging; D061353:Food Storage / Q000295:instrumentation / Q000379:methods*; D027822:Myrtaceae / Q000737:chemistry*; D011208:Powders / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000032:analysis
chemical_list: D011208:Powders; D014867:Water; D001205:Ascorbic Acid