| dc.description.abstract | The aim of this research was to study the variation of shelf-life values, obtained in quantifying shelf-life of biscuits among models of accelerated storage studi.8 (ASS) from unidirectional Fick'S law. Shelf-life of biscuits is defined as the length of time of a packaged biscuits can be stared before the onset quality change appears. Four models: Heise-Eichner (1971), Labuza(1989). Rudolph (1986) and Half Value Period or HVP model (Syarief, 1986) were evaluated. These models shared a common basic principle that they were all derived and developed from unidirectional FicA's law. Therefore, each pammeter of individual model can be compared to the others. A semi empirical approach using reaction kinetics through Arrhenius plot was used as a real shelf- life values. Quantification resulted in two, categories of shelf-life values, First those which higher than expected value and second, were lower than expected. Parameter evaluation of components of Heiss-Eichner and Larbwar models clearly shown less in number t h component of Rudolph curd HVP models. This led to a conclusion that the more sophisticated models gave higher shelf-lib values as compared to the Arrhenius model. | id |
