目的:建立同时测定复方吐温软膏中硫酸新霉素与盐酸达克罗宁含量的HPLC-DAD-ELSD法。方法:采用 Agilent ZOR BAXSB-C18色谱柱(250 mm ×4.6 mm,5μm),以含0.1 mol·L-1三氟乙酸的水溶液、乙腈为流动相,梯度洗脱,流速为1.0 m...目的:建立同时测定复方吐温软膏中硫酸新霉素与盐酸达克罗宁含量的HPLC-DAD-ELSD法。方法:采用 Agilent ZOR BAXSB-C18色谱柱(250 mm ×4.6 mm,5μm),以含0.1 mol·L-1三氟乙酸的水溶液、乙腈为流动相,梯度洗脱,流速为1.0 ml·min-1,DAD的检测波长为282 nm,ELSD的漂移管温度为50℃,雾化温度为60℃,载气流速为1.6 L·min-1,柱温为35℃。结果:硫酸新霉素检测浓度的线性范围为141.540~323.520μg·ml-1(r=0.9996),平均回收率为98.87%,RSD=0.95%(n=9);盐酸达克罗宁检测浓的线性范围为28.000~64.000μg·ml-1(r=0.9996),平均回收率为99.57%,RSD=1.10%(n=9)。结论:该方法结果准确、灵敏度高、重复性好,在同一色谱条件下实现了复方吐温软膏中全部有效成分的含量测定,为其质量控制提供了依据。展开更多
A sensitive and specific high performance liquid chromatography (HPLC) method was developed and validated for the simultaneous determination of metformin hydrochloride (HCI) in human plasma. The HPLC method consis...A sensitive and specific high performance liquid chromatography (HPLC) method was developed and validated for the simultaneous determination of metformin hydrochloride (HCI) in human plasma. The HPLC method consists of isocratic eluation with a mixture of 60% buffer (10 mM sodium dihyrogenphosphate-10 mM sodium dodecyl sulphate) and 40% acetonitrile with final pH 7.0 with flow rate of 1.0 mL/min on a Kromasil~ Akzo Nobel RP-18 (4.6 mm ID ~ 250 mm, 5 ~tm) column at an ambient temperature. Photo diode array detection was performed in program mode at 234 rim. The analyte and diazepam as internal standard (IS) were extracted from plasma using 10% trichloroacetic acid. The assay was linear over the therapeutic concentration range of 20-2,500 ng/mL for metformin HCI with correlation coefficient of r = 0.9999. Limit of quantitation was 20 ng/mL. The results obtained for intraJinter day accuracy and precision complied very well with the generally accepted criteria for bio-analytical assay. The method was applied to bioequivalence (BE) study of metformin HCI in healthy Indonesian volunteers after treatment with 750 mg XR metformin HCI. This BE study shows that the two formulations are equivalent so that they were therapeutically interchangeable for each other.展开更多
The crosstalk caused by oblique incident ray on a PIN detector array is analyzed. An integral expression of crosstalk factor in relation to incident angle and structure parameters is deduced and the correctness of the...The crosstalk caused by oblique incident ray on a PIN detector array is analyzed. An integral expression of crosstalk factor in relation to incident angle and structure parameters is deduced and the correctness of the deduction is tested and verified.展开更多
文摘A sensitive and specific high performance liquid chromatography (HPLC) method was developed and validated for the simultaneous determination of metformin hydrochloride (HCI) in human plasma. The HPLC method consists of isocratic eluation with a mixture of 60% buffer (10 mM sodium dihyrogenphosphate-10 mM sodium dodecyl sulphate) and 40% acetonitrile with final pH 7.0 with flow rate of 1.0 mL/min on a Kromasil~ Akzo Nobel RP-18 (4.6 mm ID ~ 250 mm, 5 ~tm) column at an ambient temperature. Photo diode array detection was performed in program mode at 234 rim. The analyte and diazepam as internal standard (IS) were extracted from plasma using 10% trichloroacetic acid. The assay was linear over the therapeutic concentration range of 20-2,500 ng/mL for metformin HCI with correlation coefficient of r = 0.9999. Limit of quantitation was 20 ng/mL. The results obtained for intraJinter day accuracy and precision complied very well with the generally accepted criteria for bio-analytical assay. The method was applied to bioequivalence (BE) study of metformin HCI in healthy Indonesian volunteers after treatment with 750 mg XR metformin HCI. This BE study shows that the two formulations are equivalent so that they were therapeutically interchangeable for each other.
文摘The crosstalk caused by oblique incident ray on a PIN detector array is analyzed. An integral expression of crosstalk factor in relation to incident angle and structure parameters is deduced and the correctness of the deduction is tested and verified.