Measurement and Correlation for the Solid Solubility of Antioxidants Sodium <scp>l</scp>-Ascorbate and Sodium Erythorbate Monohydrate in Supercritical Carbon Dioxide

Abstract

In this research, the solubility of sodium l -ascorbate and that of sodium erythorbate monohydrate, both being antioxidants, in supercritical carbon dioxide are measured. Using semiflow type equipment, this experiment gathers the data of solubility for antioxidnats at (308.15, 313.15, and 318.15) K, over a range of pressures from (12 to 24) MPa. The data gleaned from the experiment are forward numerically processed, with the use of the semiempirical equations presented by Chrastil and by Mendez-Santiago and Teja, to make clear the correlation among various characteristics. The final results are satisfactory: when parameters with optimal fitting are picked to examine the correlation, the average absolute relative deviation (AARD) is under 4 %.