Gas chromatographic analysis of aromatic, carboxylic acids in the presence of C1-C5 fatty acids and C2-C7 dicarboxylic acids esterified in aqueous solutions as the n-butyl esters

I. Molnár-Perl, V. Fábián-Vonsik, M. Pintér-Szakács

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The direct esterification and gas chromatographic analysis of aromatic carboxylic acids as n-butyl esters is described. Derivatization is performed in aqueous solution with n-butanol in the presence of sulfuric acid. The butyl esters of benzoic, phthalic, hemimellitic, trimellitic, trimesic and pyromellitic acids permit their gas chromatographic separation from each other and from fatty acids and alipatic dicarboxylic acids. At mole ratios of [H2O]/ [n-BuOH]≤0.04 the water present does not interfere with the esterification reaction. At mole ratios above 0.04 anhydrous sodium sulfate is used for binding the water, at mole ratios of [Na2SO4 anh.]/[H2O]=0.25-0.75.

Original languageEnglish
Pages (from-to)673-676
Number of pages4
JournalChromatographia
Volume18
Issue number12
DOIs
Publication statusPublished - Dec 1984

Fingerprint

Dicarboxylic Acids
Esterification
Carboxylic Acids
Gas chromatography
Gas Chromatography
Esters
Fatty Acids
1-Butanol
Water
Carboxylic acids
Gases
pyromellitic acid
sodium sulfate
trimesic acid
sulfuric acid
trimellitic acid

Keywords

  • Esterification in aqueous solution
  • Gas chromatography
  • n-Butyl esters of aromatic polycarboxylic acids

ASJC Scopus subject areas

  • Analytical Chemistry
  • Clinical Biochemistry

Cite this

Gas chromatographic analysis of aromatic, carboxylic acids in the presence of C1-C5 fatty acids and C2-C7 dicarboxylic acids esterified in aqueous solutions as the n-butyl esters. / Molnár-Perl, I.; Fábián-Vonsik, V.; Pintér-Szakács, M.

In: Chromatographia, Vol. 18, No. 12, 12.1984, p. 673-676.

Research output: Contribution to journalArticle

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AB - The direct esterification and gas chromatographic analysis of aromatic carboxylic acids as n-butyl esters is described. Derivatization is performed in aqueous solution with n-butanol in the presence of sulfuric acid. The butyl esters of benzoic, phthalic, hemimellitic, trimellitic, trimesic and pyromellitic acids permit their gas chromatographic separation from each other and from fatty acids and alipatic dicarboxylic acids. At mole ratios of [H2O]/ [n-BuOH]≤0.04 the water present does not interfere with the esterification reaction. At mole ratios above 0.04 anhydrous sodium sulfate is used for binding the water, at mole ratios of [Na2SO4 anh.]/[H2O]=0.25-0.75.

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