果汁、啤酒、葡萄酒、白兰地、白兰地酒和酒类原料中无机阳离子（钠、钾、钙、镁离子等）检测方案(毛细管电泳仪)

HIGH PERFORMANCECAPILLARYELECTROPHORESIS SYSTEM DETERMINATION OF INORGANIC CATIONS IN DRINKSw LUMEX Method M 04-52 (2008) INTRODUCTION The method enables fast determination of inorganic cations (sodium， potassium， calcium， and magnesium)in the samples of juices， beer， wines， brandies， brandy alcohols， and raw materials by capillaryelectrophoresis. MEASUREMENT METHOD The capillary electrophoresis method for evaluation of cations concentration is based on differential migrationand separation of cations in electric field due to the difference in their electrophoretic mobility. Identificationand quantitative determination of the analyzed cations is performed by indirect detection measuring UVabsorption at 254 nm (for“CAPEL-103RT/104T”systems) or 267 nm (for“CAPEL-105/105M”systems)wavelength. MEASUREMENT RANGE Cations Measurement range， mg/L Calcium 1.0-500 Magnesium 0.5-500 Potassium 1.0-4000 Sodium 1.0-500 The determination is not hindered by the presence of anions of ammonia， lithium， strontuim， barium，manganese， ferrum (II) in the quantities that are typical for the analyzed drinks. EQUIPMENT AND REAGENTS The"CAPEL@“ capillary electrophoresis system with high-voltage positive polarity is used in measurements.Data acquisition， collection， processing and output are performed using a personal computer running under“WINDOWS° 2000/XP”operating system with installed dedicated software package for acquisition andprocessing of chromatography data. All reagents must be of analytical grade or better. EXAMPLE OF A REAL ANALYSIS Buffer：benzimidazole solution， with tartaric acid and 18-crown-6Capillary：LEFF/LTOTAL 50/60 cm， ID 75 pmInjection：150 mbarx secVoltage：+13 kVDetection：267 nm， indirect The contents on this paper are subject to change without notice.     CAPEL系列高效毛细管电泳仪是一种快速、简便的分析仪器，可应用于多个行业，进行定性和定量分析。成熟的仪器、优化的配置、大量的应用方法包集一体，被用户称为目前性价比最优的毛细管电泳仪。在全有拥有广泛的客户群体，如BASF巴斯夫，EMPA瑞士国家联邦实验室，VEOLIA威立雅，ALS实验室，Fertico，俄罗斯环保，中科院化物所，北京大学等均定期采购。产品方法符合EPA 6500，水中阴离子检测；ASTM D 6508-00、ASTM D7881、ASTM D7882，GB/T 30921.1-2014 、OVI（国际葡萄和葡萄酒组织）等国内外方法标准。    毛细管电泳法的分析优势特点有：1.高效分离效率(百万级理论塔板数)；2.样品试剂和样品量消耗低；3.极低的分析成本，毛细管柱一般无需更换；4.操作简单便捷，实现快速分析 (5-10分钟)。     该方法能够快速测定果汁、啤酒、葡萄酒、白兰地、白兰地醇和原料样品中的无机阳离子（钠、钾、钙和镁）。