A static method is proposed for the measurement of CO(2) transmission of edible films. It is based on the absorption of CO(2) transmitted through the film on an absorbent ascarite II. Water is evolved during absorption of CO(2) by ascarite II and that is absorbed by a desiccant, anhydrous CaCl(2). Total CO(2) transmission is determined from the increase in weight of the absorbents. The transmission parameters, CO(2) transmission rate (CO(2)TR), CO(2) permeance and CO(2) permeability (CO(2)P), are also calculated. The edible film used was composed of methyl cellulose and polyethylene glycol. An attempt was made to determine the optimum amounts of ascarite II and CaCl(2) to be used. Finally, the effect of CO(2) pressure on the transmission parameters was also examined. CO(2)TR was found to increase with increasing pressure while CO(2) permeance and CO(2)P values were found to decrease with increasing pressure. (C) 1999 Society of Chemical Industry.
A static method is proposed for the measurement of CO2 transmission of edible ®lms. It is
based on the absorption of CO2 transmitted through the ®lm on an absorbent ascarite II. Water is evolved during absorption of CO2 by ascarite II and that is absorbed by a desiccant, anhydrous CaCl2. Total CO2 transmission is determined from the increase in weight of the absorbents. The transmission parameters, CO2 transmission rate (CO2TR), CO2permeance and CO2permeability (CO2P), are also calculated. The edible ®lm used was composed of methyl cellulose and polyethylene glycol. An attempt was made to determine the optimum amounts of ascarite II and CaCl2 to be used. Finally, the effect of CO2 pressure on the transmission parameters was also examined. CO2TR was found to increase with increasing pressure while CO2 permeance and CO2P values were found to decrease with increasing
pressure.
