毛细管柱PEG20M = 以聚乙二醇（分子量约200万）为固定相的熔融石英毛细管色谱柱。
PEG-20M是一种强极性的固定相。其分离机理主要基于目标化合物与固定相之间的氢键作用力和偶极-偶极相互作用。
主要优点：
对含氧/氮极性化合物选择性极佳：尤其擅长分离醇类、醛类、酮类、酯类、脂肪酸、芳香烃异构体等。
分离醇和水：是少数几种可以有效分离水和低级醇（如甲醇、乙醇）的固定相之一。
适用于香气和风味分析：在食品、香精香料行业应用广泛。
惰性相对较好：对活性化合物（如醇、酸）的拖尾现象比很多固定相要轻。
主要缺点和注意事项：
温度上限低：这是PEG柱最大的限制。其最高恒温使用温度通常为 ~240°C，程序升温最高可达 ~250°C。温度过高会导致固定相流失和分解，损坏柱子。
易氧化和水解：对氧气和水分非常敏感。氧气的存在会高温下会快速降解PEG，导致柱效严重下降、基线噪音升高。水分会使其水解。
寿命相对较短：由于上述化学不稳定性，在常规使用下，其寿命通常不如像聚硅氧烷类的柱子长。
主要应用领域
基于其强极性的特点，PEG-20M毛细管柱广泛应用于：
溶剂杂质分析：如乙醇中的甲醇、高级醇杂质。
香料和精油分析：分离复杂的萜烯类、醇类、酯类化合物。
环境分析：如水中挥发性有机物、醇类等。
食品和饮料分析：如白酒中的风味物质，果汁中的香气成分。
脂肪酸甲酯分析：虽然不如专用柱，但可以用于分离。
医药和化工：各种极性溶剂和中间体的分析。
浩瀚色谱（山东）应用技术开发有限公司,研制的毛细管柱PEG20M是气相色谱中用于分离极性化合物的利器。它凭借出色的选择性，在风味、香精、酒精饮料、环境等分析领域不可替代。
名称：毛细管柱
规格：30m*0.32mm*1um
型号：PEG-20M
zui高温度：250°C
应用：主要分析酒精饮料、香味成分、中性溶剂等
适用于：
安捷伦490在线/便携，4890,5890,6890,7820,7890,8860,8890
岛津GC-14C，GC-2010，GC-2014，GC-2030
赛默飞1310,1300,1610,1600
瓦里安3800系列
布鲁克PE580,590,680,690
磐诺A90，福立GC9790，华爱，天瑞，天美，GC7900，川仪，北分瑞利，东西电子，鲁南瑞虹，捷岛/科晓
Capillary column PEG20M=fused silica capillary column with polyethylene glycol (molecular weight about 2 million) as the stationary phase.
PEG-20M is a highly polar stationary phase. The separation mechanism is mainly based on the hydrogen bonding forces and dipole dipole interactions between the target compound and the stationary phase.
Main advantages:
Excellent selectivity for polar compounds containing oxygen/nitrogen: particularly adept at separating alcohols, aldehydes, ketones, esters, fatty acids, aromatic hydrocarbon isomers, etc.
Separation of alcohols and water: It is one of the few stationary phases that can effectively separate water from lower alcohols such as methanol and ethanol.
Applicable to aroma and flavor analysis: It is widely used in food, essence and spice industries.
Relatively good inertness: the tailing phenomenon of active compounds (such as alcohols and acids) is lighter than many stationary phases.
Main drawbacks and precautions:
Low upper temperature limit: This is the biggest limitation of PEG columns. Its maximum constant temperature usage temperature is usually around 240 ° C, and the maximum programmed temperature can reach around 250 ° C. Excessive temperature can cause loss and decomposition of the stationary phase, damaging the column.
Easy to oxidize and hydrolyze: very sensitive to oxygen and moisture. The presence of oxygen can rapidly degrade PEG at high temperatures, leading to a severe decrease in column efficiency and an increase in baseline noise. Moisture will cause it to hydrolyze.
Relatively short lifespan: Due to the chemical instability mentioned above, under normal use, its lifespan is usually not as long as columns like polydimethylsiloxane.
Main application areas
Based on its strong polarity, PEG-20M capillary columns are widely used in:
Solvent impurity analysis: such as methanol and higher alcohol impurities in ethanol.
Spice and essential oil analysis: Separate complex terpenes, alcohols, and esters.
Environmental analysis: such as volatile organic compounds and alcohols in water.
Food and beverage analysis: such as flavor substances in Baijiu and aroma components in fruit juice.
Fatty acid methyl ester analysis: Although not as good as specialized columns, it can be used for separation.
Pharmaceutical and chemical industries: analysis of various polar solvents and intermediates.
The PEG20M capillary column developed by Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. is a powerful tool for separating polar compounds in gas chromatography. With its excellent selectivity, it is irreplaceable in the fields of flavor, essence, alcoholic drinks, environment and other analysis.
滕州市浩瀚色谱仪器技术服务有限公司
电话：0632-5667636
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