The use of supercritical-fluid chromatography for determining partial molar volumes of ethyl esters of cis-5,8,11,14,17-eicosapentaenoic acid (EPA) and cis -4,7,10,13,16,19- docosa-hexaenoic acid (DHA) in supercritica...The use of supercritical-fluid chromatography for determining partial molar volumes of ethyl esters of cis-5,8,11,14,17-eicosapentaenoic acid (EPA) and cis -4,7,10,13,16,19- docosa-hexaenoic acid (DHA) in supercritical carbon dioxide is presented and discussed. Partial molar volumes of EPA and DHA esters are obtained from the variation of the retention properties with the density of mobile phase at 313.15 K, 323.15 K, 333.15 K and in the pressure range from 9 MPa to 21 MPa.展开更多
The solubility of Troeger's base (TB) in SC-C_2/CH_3OH was measured at 308K in the pressure range of 8 to 13 MPa. and methanol concentration ranges from 0 to 20 mol%. The solubility increases dramatically with met...The solubility of Troeger's base (TB) in SC-C_2/CH_3OH was measured at 308K in the pressure range of 8 to 13 MPa. and methanol concentration ranges from 0 to 20 mol%. The solubility increases dramatically with methanol concentration. Comparison of solubility in supercritical CO_2 with and without 10 mol% CH3,OH in the prcssure of 8 MPa at 308K implies that both curves are steep in the lower pressure range but become smooth as the pressure increases.展开更多
文摘The use of supercritical-fluid chromatography for determining partial molar volumes of ethyl esters of cis-5,8,11,14,17-eicosapentaenoic acid (EPA) and cis -4,7,10,13,16,19- docosa-hexaenoic acid (DHA) in supercritical carbon dioxide is presented and discussed. Partial molar volumes of EPA and DHA esters are obtained from the variation of the retention properties with the density of mobile phase at 313.15 K, 323.15 K, 333.15 K and in the pressure range from 9 MPa to 21 MPa.
基金The authors are grateful to the National Natural Science Foundation of China for the financial support!(Project no.29776040)
文摘The solubility of Troeger's base (TB) in SC-C_2/CH_3OH was measured at 308K in the pressure range of 8 to 13 MPa. and methanol concentration ranges from 0 to 20 mol%. The solubility increases dramatically with methanol concentration. Comparison of solubility in supercritical CO_2 with and without 10 mol% CH3,OH in the prcssure of 8 MPa at 308K implies that both curves are steep in the lower pressure range but become smooth as the pressure increases.
