Gas chromatographic analysis of C2−C16 dicarboxylic acids esterified in aqueous solutions as n-propyl esters |
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Authors: | I Molnár-Perl M Morvai |
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Institution: | 1. Institute of Inorganic and Analytical Chemistry, L. E?tv?s University, Múzeum krt. 4/B, H-1088, Budapest, Hungary
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Abstract: | Summary C2−C16 dicarboxylic acids were esterified in aqueous solution in the presence of sulfuric acid. Esterification in water/n-propanol
mixtures with mole ratios between 0.03 and 2.21 can be utilized for the quantitative determination of dicarboxylic acids by
gas chromatography. The presence of water does not interfere at water/n-propanol mole ratios below 0.45. For mole ratios above
0.45 anhydrous sodium sulfate has been used for binding the water. The mole ratio range tested was 0.12–0.99 for anhydrous
sodium sulfate/water, and 0.16–2.55 for sulfuric acid/anhydrous sodium sulfate. |
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Keywords: | Gas chromatography Dicarboxylic acid analysis n-Propyl esters of C2− C16 dicarboxylic acids Esterification in aqueous solution |
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