Determination of shelf life of Spirulina platensis (MI) grown in the Philippines

摘要

Gamma linolenic acid (GLA) degradation in Spirulina followed first-order reaction kinetics. At an accelerated temperature range of 45 to 55pC, the degradation rate constants (k r) of GLA obtained were 4.0 x 10-po to 8.8 x 10-po day-p#. The energy of activation (E a) was 16.53 kcal mol-p#, and the Q was 2.22. Based on 20% GLA degradation, the shelf life of sun-dried Spirulina at 30pC is 263 days or 8.6 months using the Arrhenius plot, and 258 days or 8.5 months using the Q approach.