Measurement and Correlation for the Solid Solubility of Antioxidants d-Isoascorbic Acid and Calcium l-Ascorbate Dihydrate in Supercritical

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• 作者：Tzu-Chi Wang ; Ping-Yen Lee
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2014
• 出版时间：March 13, 2014
• 年：2014
• 卷：59
• 期：3
• 页码：613-617
• 全文大小：290K
• 年卷期：v.59,no.3(March 13, 2014)
• ISSN：1520-5134

文摘

The central task of this research is devoted to the measurement of the solubility of two antioxidants鈥?span class="smallcaps">d-isoascorbic acid and calcium l-ascorbate dihydrate鈥攊n supercritical carbon dioxide. The experiment, using a semiflow type apparatus, takes data at various temperatures, over pressures ranging from 12 MPa to 24 MPa. The acquired data are then processed numerically鈥攚ith the aid of semiempirical equations proposed by Chrastil and by Mendez-Santiago and Teja鈥攖o find the correlated relationship. The correlated results from both equations yield satisfactory results with an average absolute relative deviation (AARD) under 5 % when optimally fitted parameters are chosen.