Identification of organic acids and quantification of dicarboxylic acids in Bayer process liquors by GC-MS

作者：Xiao Jian Bo^*

来源：Chromatographia, 2007, 65(3-4): 185-190.

DOI：10.1365/s10337-006-0135-0

• gas chromatography-mass spectrometry
• organic acids
• dicarboxylic acids
• Bayer liquors

Two well-known derivatization procedures, H2SO4-butanol and H2SO4-methanol esterification, were compared for application to GC-MS identification of organic acids in Bayer process liquors. H2SO4-butanol and H2SO4-methanol derivatization must be combined for analysis of carboxylic acids. Twenty organic acids were identified by gas chromatography-mass spectrometry. Heptanedioic, 3-methylhexanedioic, octanedioic, 1,3-benzenedicarboxylic, nonanedioic, decanedioic, hexadecanoic, 9,1 2-octadecadienoic, octadecanoic, and phthalic acids were identified for the first time in Bayer liquors. The retention times (y) and carbon numbers W of these seven n-dicarboxylic acids (C-4-C-10) were fit to a linear relationship by use of Microsoft Excel. These dicarboxylic acids and two benzenedicarboxylic acids were quantified by use of the internal standard method.

• 出版日期2007-2
• 单位中南大学