Analysis of Hydroxy-Containing Seed Oils Using Atmospheric Pressure Chemical Ionization Mass Spectrometry
作者:
W.C. Byrdwell,
W.E. Neff,
期刊:
Journal of Liquid Chromatography & Related Technologies
(Taylor Available online 1998)
卷期:
Volume 21,
issue 10
页码: 1485-1501
ISSN:1082-6076
年代: 1998
DOI:10.1080/10826079808000529
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Atmospheric pressure chemical ionization mass spectrometry (APCI-MS) coupled to reversed-phase high performance liquid chromatography (RP-HPLC) was used for direct analysis of intact triacylglycerols (TAGs) from hydroxy-containing plant oils. Castor bean oil,Lesquerella fendleriandLesquerella gordoniioils were separated into tri-hydroxy, di-hydroxy, mono-hydroxy, and non-hydroxy TAGs using the RP-HPLC method. The APCI-MS ionization source produced fragments representing loss of zero (protonated molecular ion), one, two, and three hydroxy groups. The primary fragments (base peaks) in the mass spectra resulted from loss of all hydroxy groups from the TAGs. Using the acetonitrile/methylene chloride solvent system, diagnostically important acetonitrile adducts were formed which allowed identification of the molecular weights of the hydroxy TAGs as well as confirmation of the number of hydroxy groups contained therein. A series of four adducts was formed: [M+23]+, [M+39]+, [M+54]+, and [M+59]+.
点击下载:
PDF (768KB)
返 回