葡萄酒、烈性酒、白酒、酒类中防腐剂（山梨酸、苯甲酸、抗坏血酸等）检测方案(毛细管电泳仪)

Analytical Equipmentwww.lumexinstruments.com DETERMINATION OF ORGANIC ACIDS AND SOME PRESERVATIVESIN WINE AND SPIRITS LUMEX Organic Acids Chemical Kit_Wines INTRODUCTION The organic acids profile in wine is a highly informative parameter since it reveals important features ofthe whole technological process. It is also one of the most important criteria for wine authentication. Inspirits like cognac， brandy or whiskey， the presence of certain organic acids can indicate the violation ofdistillation or maturation processes or reveal the tendency to precipitate during storage. Some organic acids (sorbic， benzoic， ascorbic) can serve as preservatives； their presence is strictlyregulated. Although the presence of sorbic acid in alcoholic beverages can be natural in some cases，inother cases it can indicate severe violation of the technological process or even complete falsification. LUMEX INSTRUMENTS offers a specially developed Organic Acids Chemical Kit_Wines together witha detailed analytical protocol， which allows the determination of most important organic acids likesuccinic， malic， tartaric， citric， acetic， and lactic in wines， wine products， and spirits. Some otherorganic acids (gluconic， oxalic， etc.) and also some preservatives like sorbic acid， benzoic acid， andascorbic acid can be also quantified by this kit. Analytical method based on the developed LUMEX INSTRUMENTS protocol has been certified byFrench Certification Committee COFRAC. MEASUREMENT METHOD The capillary electrophoresis method for the determination of organic acids is based on their differentialmigration and separation in a fused silica capillary under the influence of an electric field. Samplepretreatment includes simple dilution with water. CE separation is completed within 7 minutes. EQUIPMENT AND REAGENT The CAPEL-105M capillary electrophoresis system is used in measurements. Data acquisition， collection，processing and output are performed using a personal computer running under WINDOWS XP/7operating system with installed dedicated software package ELFORUN All reagents must be ofanalytical grade or better. EXAMPLE OF A REAL ANALYSIS mAU The contents of this paper are subject to change without notice.The information in this leaflet is supplemental. To get more specific information on this method， please contact the developer of thismethod Lumex Instruments Group. NORTH AMERICA EUROPE RUSSIA CHINA Beijing Lumex Analytical Equipment Co. Ltd. E-mail： lumex@lumex.com.cn www.lumexcn.com 葡萄酒中的有机酸图谱是一个含有丰富信息的参数，因为它揭示了整个工艺过程的重要特征。它也是葡萄酒认证的最重要的标准之一。像干邑、白兰地或威士忌一样，某些有机酸的存在可以揭示蒸馏或成熟过程的破坏程度或揭示储存过程中沉淀的影响。某些有机酸（山梨酸、苯甲酸、抗坏血酸）可以作为防腐剂，它们的使用受到严格的控制。虽然山梨酸在酒精饮料中的存在在某些情况下是天然的，但在大部分情况下，它可以表明酒类生产者严重违反了工艺过程或甚至完全伪造。LUMEX仪器公司专门开发了一种有机酸分析包，它可以测定葡萄酒和烈酒中最重要的有机酸，如琥珀酸、苹果酸、酒石酸、柠檬酸、乙酸和乳酸。另外一些其他的有机酸（葡萄糖酸、草酸等）和某些防腐剂（如山梨酸、苯甲酸和抗坏血酸）也可以用该试剂盒进行定量。基于LUMEX仪器开发的毛细管电泳分析葡萄酒的方法已得到法国认证委员会COFRAC的认证。