目的:建立肉苁蓉药材中通便有效成分半乳糖醇的含量测定方法。方法:采用高效液相色谱分离,蒸发光散射检测器(ELSD)检测,色谱柱为 Prevail Carbohydrate ES 聚合凝胶柱(250mm×4.6mm,5μm),流动相为乙腈-水(77:23),流速为0.7mL·...目的:建立肉苁蓉药材中通便有效成分半乳糖醇的含量测定方法。方法:采用高效液相色谱分离,蒸发光散射检测器(ELSD)检测,色谱柱为 Prevail Carbohydrate ES 聚合凝胶柱(250mm×4.6mm,5μm),流动相为乙腈-水(77:23),流速为0.7mL·min^(-1);柱温为25℃,检测器漂移管温度为40℃,气体压力为240kPa。结果:半乳糖醇线性范围为0.25～10.00μg,r=0.9992;平均回收率为99.42%。结论:本法简便、准确,可作为肉苁蓉药材的质控方法。展开更多
The heat capacities of D-galactose and galactitol were measured on a quantum design physical property measurement system（PPMS） over a temperature range of 1.9-300 K, and the experimental data were fitted to a functi...The heat capacities of D-galactose and galactitol were measured on a quantum design physical property measurement system（PPMS） over a temperature range of 1.9-300 K, and the experimental data were fitted to a function of T using a series of theoretical and empirical models in appropriate temperature ranges. The fit results were used to calculate thermodynamic function values, C^θp,m, ^T0S0^θm , and △^T0H^θm from 0 K to 300 K. The standard molar heat capacity, entropy and enthalpy values of D-galactose and galactitol at 298.15 K and 0.1 MPa were determined to be C^θp,m=（227.96±2.28） and（239.50±2.40） J·K^-1·mol^-1, S0^θm = （211.22±2.11） and （230.82±2.30） J·K^-1·mol^-1 and μm = （33.95±0.34） and （36.57±0.37） kJ/mol, respectively.展开更多
文摘目的:建立肉苁蓉药材中通便有效成分半乳糖醇的含量测定方法。方法:采用高效液相色谱分离,蒸发光散射检测器(ELSD)检测,色谱柱为 Prevail Carbohydrate ES 聚合凝胶柱(250mm×4.6mm,5μm),流动相为乙腈-水(77:23),流速为0.7mL·min^(-1);柱温为25℃,检测器漂移管温度为40℃,气体压力为240kPa。结果:半乳糖醇线性范围为0.25～10.00μg,r=0.9992;平均回收率为99.42%。结论:本法简便、准确,可作为肉苁蓉药材的质控方法。
基金Supported by the National Natural Science Foundation of China（No.21473198）.
文摘The heat capacities of D-galactose and galactitol were measured on a quantum design physical property measurement system（PPMS） over a temperature range of 1.9-300 K, and the experimental data were fitted to a function of T using a series of theoretical and empirical models in appropriate temperature ranges. The fit results were used to calculate thermodynamic function values, C^θp,m, ^T0S0^θm , and △^T0H^θm from 0 K to 300 K. The standard molar heat capacity, entropy and enthalpy values of D-galactose and galactitol at 298.15 K and 0.1 MPa were determined to be C^θp,m=（227.96±2.28） and（239.50±2.40） J·K^-1·mol^-1, S0^θm = （211.22±2.11） and （230.82±2.30） J·K^-1·mol^-1 and μm = （33.95±0.34） and （36.57±0.37） kJ/mol, respectively.
