石油化工2012，Vol.41Issue(10)：1196-1200,5.
顶空气相色谱法测定生物柴油中的微量甲醇
Determination of Methanol Content in Biodiescl by Headspace Gas Chromatography
李长秀 1孔翠萍1
作者信息
- 1. 中国石化石油化工科学研究院,北京100083
- 折叠
摘要
Abstract
A test method for the determination of methanol content in biodiesel by headspace gas chromatography was established. Suitable headspace conditions were confirmed, namely the sample temperature 70-80 X. And equilibrium time 15-30 min. Different kinds of columns were investigated for the separation of methanol from biodiesel. For fresh-made biodiesel samples, either nonpoiar OV-1 column with thick film or column with polar phase such as CP-Wax column could achieve the separation well. For long-term stored samples, light components produced during the store would interfere in the determination of methanol, which could be eliminated by using CP-Lowox column. The methanol content in B-5 mixed biodiesel fuel could be determined by using CP-Lowox column also. An external standard quantitative formula was established with the correlation coefficient more than 0.999. Recoveries of the determination are in the range of 106%-124%. The repeatability of this method is good, which can meet the requirement of the routine analysis.关键词
生物柴油/甲醇/顶空气相色谱法Key words
biodiesel/ methanol/ headspace gas chromatography分类
化学化工引用本文复制引用
李长秀,孔翠萍..顶空气相色谱法测定生物柴油中的微量甲醇[J].石油化工,2012,41(10):1196-1200,5.
