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毛细管电泳分离氯代酚的研究 总被引:4,自引:0,他引:4
用毛细管区带电泳方法进行了氯代异构体分离的研究。使用64.5cm×50μm.I.D。石英毛细管柱,在40%有机溶剂改性的磷酸盐缓冲溶液中,通过调节最佳PH值,达到了一次进样对所有氯代酚的基线分离。 相似文献
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《Analytical letters》2012,45(11):2025-2037
Abstract A novel method was developed for separation and determination of D-gluconic acid produced during fermentation by capillary zone electrophoresis (CZE) with direct UV detection at 214 nm, using selected carrier electrolyte composed of 6 mM potassium biphthalate, 50 mM disodium hydrogen phosphate and 15% (v/v) acetonitrile. The effects of concentration of phthalate, phosphate and organic modifier (acetonitrile), as well as temperature for the separation were investigated. The method is simple, inexpensive and will make it very useful in the gluconic acid industry. 相似文献
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本文采用毛细管电泳法,以50μm内径,45cm长的弹性石英毛细管作为分离管,选用磷酸盐-硼酸盐-十二烷基硫酸钠缓冲溶液体系,在柱254nm紫外检测器,在不同的电泳电压下,对水溶性维生素,磺胺类药物、头孢菌素抗生素,解热镇痛药物有效成份进行了分析,取得较满意的结果。 相似文献
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低电渗流毛细管区带电泳分离芳香胺 总被引:2,自引:0,他引:2
利用低pH值(pH≤2.0)有效地抑制电渗流,建立起低电渗流毛细管区带电泳(CZE)体系,并分离了7种芳香胺。在此体系中,芳香胺质子化而带正电荷,故采用在毛细管阳极端进样,阴极端检测。实验考察了pH值、电解质浓度对分离的影响,结果发现,当pH<p K a (p K a =14-p K b )时,pH值的微小增大会导致芳香胺的迁移时间迅速延长;芳香胺的出峰次序与其p K b 值及分子中含有的胺基和酸性取代基的数目有关,分子中含胺基愈多,p K b 值愈小,出峰愈早;芳香胺含酸性取代基则使峰序滞后。 相似文献
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毛细管区带电泳分离小麦种子醇溶蛋白的研究 总被引:4,自引:0,他引:4
利用毛细管区带电泳(CZE)检测了在不同电泳条件下分离小麦种子醇溶蛋白的效果。结果显示,用碱性缓冲液(0.06mol/L硼酸钠,pH9.0,并含有20%乙腈和1%SDS)及47cm×50μmi.d.毛细管柱,在15kV电压和30℃的条件下可获得较高的分辨度和重复性。 相似文献
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Xiao Yan WANG Yi CHEN* Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 《中国化学快报》2000,11(12)
Precolumn derivatization is the most widely used means to overcome the detection problem in capillary electrophoresis. However most of the adopted reactions in carbohydrate labeling are time-consuming and not very selective, leading to lots of byproducts produced. We have thus tried to explored hydrazino-containing reagents which have been applied to TLC1,2 and HPLC2~5 with quite successfulness. Perez and Colón6 have also reported that dansylhydrazine can be used in CE-LIF of sugars. Th… 相似文献