使用通过型固相萃取小柱PRi ME HLB处理水产品样品,建立了一种水产品中17种磺胺类药物的简单、快速的筛选分析方法。水产品样品经80%乙腈水溶液(含0.2%甲酸)提取,过PRi ME HLB固相萃取柱净化,浓缩后经C_(18)色谱柱梯度洗脱分离,超高效...使用通过型固相萃取小柱PRi ME HLB处理水产品样品,建立了一种水产品中17种磺胺类药物的简单、快速的筛选分析方法。水产品样品经80%乙腈水溶液(含0.2%甲酸)提取,过PRi ME HLB固相萃取柱净化,浓缩后经C_(18)色谱柱梯度洗脱分离,超高效液相色谱-三重四极杆质谱系统进行定量分析。结果表明,17种磺胺类药物在1.0~50.0 ng·mL^(-1)线性关系良好,相关系数R^(2)>0.99;该方法检出限为2μg·kg^(-1);添加浓度为10μg·kg^(-1)时方法回收率在71.3%~118.4%,RSD值均小于20%。展开更多
Four isothermal sections at 298.15K,308.15K,318.15K and 328.15K in system water-n-hexane-ethanol were measured by gas chromatograph method.The innerscaling method was used to determine the concentrations of n-hexane a...Four isothermal sections at 298.15K,308.15K,318.15K and 328.15K in system water-n-hexane-ethanol were measured by gas chromatograph method.The innerscaling method was used to determine the concentrations of n-hexane and ethanol in this ternary system.Ethy1 acetate was chosen as the sample of inner-scaling because of its separability and fit retainning time.Acetylacetone was chosen as diluent of the oil phase andn-butyl alcohol was chosen as diluent of the water phase.The experimental data of four isothermal sections at 298.15K,308.15K,318.15K adn 328.15K in system water-n-hexane-ethanol at normal pressure were given.Four schematic figures were also given.The character of these phase diagrams was analysed.They were compared with the phase diagram of system water-n-hexane-methanol.The possible causes of experimental error were discussed.The root mean square error of measurement is 1.47%.展开更多
文摘使用通过型固相萃取小柱PRi ME HLB处理水产品样品,建立了一种水产品中17种磺胺类药物的简单、快速的筛选分析方法。水产品样品经80%乙腈水溶液(含0.2%甲酸)提取,过PRi ME HLB固相萃取柱净化,浓缩后经C_(18)色谱柱梯度洗脱分离,超高效液相色谱-三重四极杆质谱系统进行定量分析。结果表明,17种磺胺类药物在1.0~50.0 ng·mL^(-1)线性关系良好,相关系数R^(2)>0.99;该方法检出限为2μg·kg^(-1);添加浓度为10μg·kg^(-1)时方法回收率在71.3%~118.4%,RSD值均小于20%。
文摘Four isothermal sections at 298.15K,308.15K,318.15K and 328.15K in system water-n-hexane-ethanol were measured by gas chromatograph method.The innerscaling method was used to determine the concentrations of n-hexane and ethanol in this ternary system.Ethy1 acetate was chosen as the sample of inner-scaling because of its separability and fit retainning time.Acetylacetone was chosen as diluent of the oil phase andn-butyl alcohol was chosen as diluent of the water phase.The experimental data of four isothermal sections at 298.15K,308.15K,318.15K adn 328.15K in system water-n-hexane-ethanol at normal pressure were given.Four schematic figures were also given.The character of these phase diagrams was analysed.They were compared with the phase diagram of system water-n-hexane-methanol.The possible causes of experimental error were discussed.The root mean square error of measurement is 1.47%.
