摘要
相对分子质量是表征油品尤其是重质油性质的重要参数,油品中分子量较大的组分具有较强的缔合性,不同方法、不同条件得到的相对分子质量数值差异较大。目前应用于油品相对分子量测定的主要方法有冰点降低法、蒸气压渗透法(VPO)、凝胶渗透色谱法(GPC)、质谱法(MS)等,对各种方法的原理、测量条件、适用范围、方法优缺点等进行了论述,有助于全面了解相对分子质量不同测量方法以及提高测量结果的准确性。
The relative molecular mass is an important parameter to characterize the properties of oil products,especially heavy oil.The components with large molecular weight in oil products have strong association,and the relative molecular mass values obtained by different methods and conditions are quite different.At present,the main methods applied to the determination of relative molecular weight of oil products include freezing point reduction method,vapor pressure permeation method(VPO),gel permeation chromatography(GPC),mass spectrometry(MS),etc.The principle,measurement conditions,application scope,advantages and disadvantages of various methods are discussed,which is helpful to comprehensively understand different measurement methods of relative molecular weight and improve the accuracy of measurement results.
作者
衷晓玉
Zhong Xiaoyu(CNOOC Research Institute of Refining and Petrochemicals,Qingdao 266500,China)
出处
《山东化工》
CAS
2022年第10期92-93,96,共3页
Shandong Chemical Industry
关键词
平均分子量
蒸气压渗透法
凝胶渗透色谱
质谱
average molecular weight
vapor pressure infiltration method
gel permeation chromatography
mass spectrometry
