異抗壞血酸系抗氧化劑於超臨界二氧化碳中之溶解度

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Title:	異抗壞血酸系抗氧化劑於超臨界二氧化碳中之溶解度
Authors:	陳乃麟
Contributors:	材料科學與奈米科技研究所
Keywords:	超臨界二氧化碳異抗壞血酸溶解度
Date:	2010
Issue Date:	2011-10-31 15:25:08 (UTC+8)
Abstract:	本研究中，即利用一半流動式超臨界實驗設備，量測兩種抗氧化劑，異抗壞血酸(Erythorbic Acid)與異抗壞血酸鈉(Sodium Erythorbate)於超臨界二氧化碳中之固體溶解度。異抗壞血酸(Erythorbic Acid)量測的溫度為313.15K，壓力範圍為12到24MPa之間。異抗壞血酸鈉(Sodium Erythorbate)量測的溫度為313.15K、333.15K，壓力範圍為12到24MPa之間。實驗結果顯示，異抗壞血酸與異抗壞血酸鈉於超臨界二氧化碳中的溶解度莫耳分率介於10-7到10-6以及10-8到10-7間。同時，本研究也利用兩條半經驗式MST Model和Chrastil Model，進行溶解度數據的回歸，並經由平均絕對相對偏差(Average Absolute Relative Deviation AARD)來判斷實驗結果的合理性。 In this study, the Solubility of Erythorbic Acid and Sodium Erythorbate in supercritical carbon dioxide were measured by using a semi-flow type apparatus. The experiment data were taken at 313.15k and the pressure range from 12 to 24Mpa for Erythorbic Acid. And 313.15k, 333.15k and he pressure range from 12 to 24Mpa for Sodium Erythorbate.The solubility of Erythorbic Acid and Sodium Erythorbate in supercritical carbon dioxide are 10-7 to 10-6 and 10-8 to 10-7. The measured results were then correlated using semi-empirical equation presented by Chrastil, and Mendez-Santiago and Teja. With optimally fitted parameters, we determine the reasonableness of results by calculate the average absolute relative deviation (AARD).
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