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在柱富集
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     On-column Preconcentration and Separation of Plant Hormones by Micellar Electrokinetic Capillary Chromatography
     胶束电动毛细管色谱在柱富集和分离7种植物激素
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     A field-amplified injection procedure was also investigated as a simple and effective way to enhance the sensitivity for the determination, this procedure can improve the detection sensitivity of benproperine phosphate enantiomers up to 23 folds.
     实验还尝试采用场放大堆积方法,对磷酸苯丙哌林对映体进行在柱富集,使磷酸苯丙哌林对映体的检测灵敏度提高了23倍。
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     With the proposed method,both the resolution and detection li mit of thealkaloids were i mproved comparing with those in phosphate buffer. The resolution and detectionli mit of myosmine was 1.6 and 2 ng/mL,respectively.
     米喔斯明的分离度和检出限分别为1.6和2 ng/mL. 此外,还研究和采用了卷烟样品中痕量生物碱的毛细管电泳阳离子选择性耗尽在柱富集方法.
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     Study on Filter Fiber Coated with Phenyl Fluorone for Enricichmwet and Determination of Molybdenum Indium Germanium and Gallium by GFAAS
     负载苯基荧光酮滤纸纤维(富集
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     Advances in Preconcentration Technique on Column for Capillary Electrophoresis
     毛细管电泳富集技术研究进展
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     Pave Pillar
     (宝石)
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     Chromatographicseparation has been achieved on C18 column with acetonitrile-O.
     C18;
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     Determination of Lead and Calcium by Using Combination of Flame Atomic Absorption Spectrometry with Micro-column Preconcentration
     微富集-原子吸收光谱法线联用测定铅和钙
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  on-column concentration
Application of on-column concentration of deproteinized serum to the HPLC-determination of anticonvulsants
      
It is shown that the analytical column can be used for on-column concentration of anticonvulsants with 1 cm3 deproteinized serum.
      
Electrokinetic injections and transient isotachophoretic techniques were employed to increase sample loading and provide on-column concentration of the analyte.
      
Various attempts to improve the separation through adjustments in the temperature profile and on-column concentration proved fruitless.
      


A new method for the chiral separation of benproperine phosphate enantiomers is reported. The enantioseparation of benproperine phosphate was obtained by capillary electrophoresis using hydroxyproply-γ-cyclodextrin(HP-γ-CD) as chiral selector. When 100 mmol/L Tris-H_ 3 PO_ 4 buffer at pH 3.0 containing 25 mmol/L HP-γ-CD was chosen as a running electrolyte, the benproperine phosphate enantiomers was resolved completely within 25 min and the resolution reached up to 2.03. Coupled with ultraviolet detection, an...

A new method for the chiral separation of benproperine phosphate enantiomers is reported. The enantioseparation of benproperine phosphate was obtained by capillary electrophoresis using hydroxyproply-γ-cyclodextrin(HP-γ-CD) as chiral selector. When 100 mmol/L Tris-H_ 3 PO_ 4 buffer at pH 3.0 containing 25 mmol/L HP-γ-CD was chosen as a running electrolyte, the benproperine phosphate enantiomers was resolved completely within 25 min and the resolution reached up to 2.03. Coupled with ultraviolet detection, an excellent linear range from 0.5 mg/L to 10 mg/L for the detemination of benproperine phosphate enantiomers was exhibited. The enantioseparation method has been applied for the determination of benproperine phosphate enantiomer spiked in serum samples with satisfactory results. A field-amplified injection procedure was also investigated as a simple and effective way to enhance the sensitivity for the determination, this procedure can improve the detection sensitivity of benproperine phosphate enantiomers up to 23 folds.

以羟丙基-γ-环糊精(HP-γ-CD)为手性选择剂,采用毛细管电泳技术,对手性药物磷酸苯丙哌林的对映体拆分进行了研究。在以含有10mmol/L HP-γ-CD100mmol/L Tris-H3PO4(pH3·0)缓冲溶液为电泳电解质时,磷酸苯丙哌林对映体在25min内实现了基线分离,分离度达2·03。以紫外检测(测定波长202nm)时,其峰面积与磷酸苯丙哌林对映体的浓度在0·5~10mg/L范围内呈良好的线性关系。将其应用于合成的血清样品分析,获得了满意的结果。实验还尝试采用场放大堆积方法,对磷酸苯丙哌林对映体进行在柱富集,使磷酸苯丙哌林对映体的检测灵敏度提高了23倍。

Tobacco alkaloids were separated on baseline by capillary zone electrophoresis with abuffer solution of pH3.2,360 mmol/Ltartaric acid.Cation-selective exhaustive injection,as anon-column preconcentration method,was also investigated for the determination of the alkaloidsof cigarette samples.With the proposed method,both the resolution and detection li mit of thealkaloids were i mproved comparing with those in phosphate buffer.The resolution and detectionli mit of myosmine was 1.6 and 2 ng/mL,respectively.

采用pH 3.2,360 mmol/L酒石酸缓冲体系,毛细管区带电泳能成功地将烟草生物碱基线分离.与磷酸缓冲液相比,该方法提高了分离度和检测灵敏度.米喔斯明的分离度和检出限分别为1.6和2 ng/mL.此外,还研究和采用了卷烟样品中痕量生物碱的毛细管电泳阳离子选择性耗尽在柱富集方法.

 
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