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胶束电动力学毛细管电泳分离和测定牡蛎中的氨基酸 总被引:4,自引:0,他引:4
采用胶束电动力学毛细管电泳,在25mmol/L Na2HPO4-NaH2PO4(pH7.0),40mmol/L十二烷基硫酸钠和3mol/L尿素的实验条件下,在28min内实现了牡蛎中8种游离丹酰化氨基酸的分离和测定。在一定浓度范围内,氨基酸的峰面积与其浓度呈良好的线性关系,相关系数0.9955~0.9984之间。对于8种氨基酸,标准加入回收率在99.5%~100.7%之间。 相似文献
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以甲氧苄氨嘧啶为内标,采用胶束电动毛细管色谱法分离测定了新药消糖灵中的优降糖。电泳条件:以25 mmol/L硼砂-30 mmol/L十二烷基硫酸钠(pH 9.0)为电泳介质,未涂层石英毛细管(50 μm i.d.×39.5 cm,有效分离长度34.8 cm)为分离通道,压力进样(68.95 kPa.s),17 kV恒压电泳(28 ℃),检测波长228 nm。优降糖在14 min内与其他成分得到很好分离,且质量浓度为25 mg/L~275 mg/L时,优降糖可进行定量分析,加标回收率为(100.6±1.4)%。方法简便、快速,结果准确,重现性好,可用于优降糖复方制剂的质量控制。 相似文献
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几种核苷的毛细管胶束电动色谱分离 总被引:3,自引:0,他引:3
在胶束电动色谱模式下,考察了影响核苷分离的缓冲溶液、SDS浓度、pH、表面活性剂、有机添加剂、分离温度及外加电压等重要因素,并优化了关键的分离条件,建立了一种简单快速的利用毛细管胶束电动色谱DAD检测器分离分析核苷的新方法。当缓冲溶液为36 mmol/L硼酸缓冲液(pH 9.0)、30 mmol/L SDS和3%(V/V)乙腈,分离电压为25 kV和分离温度为25℃时,5种核苷在6 m in内实现了令人满意的基线分离。在优化的条件下,对其线性范围、检出限和重现性进行了测定。结果表明,核苷的迁移时间的重现性<1%;面积的重现性<3%。所建立的分离方法的线性范围宽,检出限低,重现性好。 相似文献
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A simple and fast micellar electrokinetic chromatographic (MEKC) method for the determination of five main compounds (hydroquinone, metol, phenidone, 2-hydroxy-5-methylaminobenzenesulphonate and 2,5-dihydroxybenzenesulphonate) in X-ray film developing solutions was developed. The optimal conditions for the separation were established by varying the concentration of sodium dodecyl sulfate (SDS), the electrolyte pH and the temperature. Successful results were obtained with a 25mmolL–1 Tris-phosphate buffer at pH 9.0 in the presence of 50mmolL–1 SDS using direct UV detection at 214nm. Under these conditions, baseline separation of the five compounds was achieved in less than 8min. The method was validated in terms of precision, linearity, accuracy, and successfully applied to the analysis of X-ray film developing baths. 相似文献
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Separation of Six Pyridoncarboylxic Acid Derivatives by Micellar and Microemulsion Electrokinetic Chromatography 总被引:1,自引:0,他引:1
Jian De LU Wei YUAN Xiao Yun FU* Analytical Testing Center Yuquan Campus Zhejiang University Hangzhou 《中国化学快报》2001,(2)
Micellar electrokinetic chromatography (MEKC) and microemulsion electrokinetic chromatography (MEEKC) are two kinds of electrokinetic capillary chromatography (EKC), which are characterized of high solubilization capacity and separation efficiency. In our previous work, some polar organic compounds and hydrophobic neutral compounds were separated successfully by EKC1-3. In this paper, these methods were used for separating six pyridoncarboylxic acid derivatives with similar structures. T… 相似文献
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