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采用十六烷基三甲基溴化铵 (CTAB)为电渗流改性剂 ,考察了邻羟基苯甲酸、间羟基苯甲酸和对羟基苯甲酸在高效毛细管区带电泳模式下的分离行为 ,研究了缓冲液的pH和添加剂甲醇的用量对这 3种同分异构体的分离、峰形和出峰顺序的影响 ,并据此优化了这 3种异构体的分离条件。 相似文献
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SeparationandDeterminationofBasesbyCapillaryZoneElectrophoresisZHAOTao,LIUQi-ping,CHENGJie-ke(DepartmentofChemistry,WuhanUniv... 相似文献
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毛细管区带电泳分离和测定嘧啶碱 总被引:1,自引:1,他引:1
本报道毛细管区带电泳分离和测定胞嘧啶,胸腺嘧啶,尿嘧啶,羟乙基氟尿嘧啶,尿嘧啶丙酸和5-氟尿嘧啶,在熔硅毛细管(70cm×75μmi,d,有效长度63cm)上,以0.01mol/L硼砂缓冲溶液(pH=9.25)作电解质,电压为20kV,温度为35℃,真空进样1s,于270nm处检测,可在8min内完全分离上述6种嘧啶碱,塔板数达到2.5×10^5,碱基检测限为(0.9~3.6)×10^-6mol 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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九种嘌呤碱的毛细管区带电泳分离 总被引:5,自引:0,他引:5
用毛细管区带电泳法分离和测定咖啡碱,9-N二羟丙基茶碱,可可碱,腺嘌呤,鸟嘌呤、茶碱、黄嘌呤、尿酸和6-巯基嘌呤,在熔硅毛细管(70cm×75μmi.d,有效长度63cm)内,使用0.01mol/L(pH=10)硼砂缓冲溶液,电压为25kV温度为30℃,真空进样1s,于260nm处检测,可在7min内分离上述到9种嘌呤碱,理论塔板数达到3.0×10^5,检测限达fmol级,方法用于人尿分析,结果令 相似文献
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毛细管电泳法分析维甲酸异构体 总被引:1,自引:0,他引:1
采用毛细管电泳分析方法对维甲酸异构体进行了分离。比较了区带电泳和胶束电动色谱两种模式对维甲酸异构体的分离效果。考察了缓冲液组成、pH值、乙腈含量以及十二烷基硫酸钠(SDS)浓度等对分离的影响。采用胶束电动色谱法可完全分离13-顺-和全反式-维甲酸,最佳的缓冲溶液为(20 mmol/L Tris-H3BO3(pH 8.5)-25 mmol/L SDS)-乙腈(体积比为80∶20)。该法首次应用于加标血浆中的维甲酸分析,获得了较好的结果。 相似文献
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The migration behavior and separation of eight benzophenones selected were investigated by capillary zone electrophoresis in the range of pH 7.5–11.5. The effect of buffer pH, the types of buffer electrolyte, and the concentration of phosphate‐borate buffer on the separation and selectivity of benzophenones selected were examined. Better separability can be obtained with phosphate‐borate buffer than with phosphate buffer or borate buffer at around pH 9.2. Baseline separation of eight benzophenones could be simultaneously and successfully achieved with an appropriate choice of buffer pH and the concentration of phosphate‐borate buffer in capillary zone electrophoresis. The migration order of benzophenones selected could be explained on the basis of the degree of ionization and molecular mass. 相似文献
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《Journal of separation science》2003,26(5):425-428
This paper describes a method for analysing some acids of milk whey by Capillary Zone Electrophoresis. After eliminating the whey proteins by ultrafiltration, the whey underwent electrophoretic separation in the presence of anodic electroosmotic flow. The following analytes were detected: citric, orotic, uric, and hippuric acids. A procedure is described for sample preparation and the operating conditions for electrophoretic capillary separation established. Finally, orotic acid is quantitatively determined. 相似文献
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IntroductionTheincreasingnecessity0fpharmacologicalresearchforchiraldrugshasrenderedchiralseparationanactiveareaincaPillaryelectroph0resis(CE)today.Variousmodes0fCE,includingcaPillaryzoneelectroph0resis(CZE),micellarelectrokineticchromatography(MEKC),caPillarygelelectrophoresis(CGE)andcapillaryisotachophoresis(CITP),havebeenappliedforthispurp0se',amongwhichCZEisthemostpopularoneforitshighefficiency,lowexpenseandeaseofoperation.Forsuccessfulchiralseparati0ninCZE,theselectortypeisofcr… 相似文献
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在铬酸盐和硼酸盐溶液中,以十六烷基三甲基溴化铵(CTAB)为电渗流改性剂,通过添加有机添加剂甲醇,成功地分离了砷酸根、硒酸根及常见酸根离子。优化分离条件发现,采用210 nm直接检测砷酸根比在260 nm处间接检测其检出限更低,而且可以减少大量C l-的干扰。迁移时间重复性的相对标准偏差(RSD)不大于3.0%,当信噪比(S/N)为2时,在260 nm处,HAsO42-与SeO42-的检出限分别为0.019 mg/L和0.078mg/L;在210 nm处,HAsO42-检出限可达0.004 3 mg/L。加标回收率均在95%~108%之间,满足定量要求。但NO3-会干扰HAsO42-的定量分析。 相似文献
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毛细管电泳中聚合物溶液筛分脱氧核糖核酸 总被引:8,自引:0,他引:8
围绕着毛细管电泳中聚合物溶液筛分脱氧核糖核酸(DNA)的机理和分离介质、条件,综述了近年来该技术的发展,及其在DNA测序、聚合酶链反应(PCR)产物分析方面的应用及其发展前景。 相似文献
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郁金中姜黄素类化合物的毛细管区带电泳法测定 总被引:4,自引:0,他引:4
本文在提取中药郁金中姜黄素类化合物的基础上,利用毛细管区带电泳法对郁金中所含黄素类化合物进行了分离研究,确定了最佳分离条件:9mmol/L单-6-O-苯基氨甲酰基-β-CD(mono-6-O-phenylcarbamoyl-β-CD),40mmol/L硼砂缓冲液,分离电压为15kV,毛细管柱温度为22℃,紫外检测波长为214nm,pH值为9.0。双去甲氧基姜黄素、去甲氧基姜黄素和姜黄素在此条件下10 m in内能够达到基线分离,方法快速、简便、且消耗试剂少,不污染环境。 相似文献