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<p>Surface energy analysis of red benzoin (RB) and white benzoin (WB), and the separation power of their isomers, was performed using inverse gas chromatography (IGC). The selectivity coefficients (<InlineEquation ID="IEq1"><EquationSource Format="TEX">\(\:{\alpha\:}_{A}\)</EquationSource></InlineEquation>) of the structural isomers of RB and WB at infinite dilution were determined to be between 373.2 and 398.2&#xa0;K for butyl acetate, butyl alcohol, amyl alcohol, and xylene isomers. IGC measurements were performed at infinite dilution to determine the specific adsorption enthalpies of the probe molecules. Based on the IGC measurements, the acidity constants (<InlineEquation ID="IEq2"><EquationSource Format="TEX">\(\:{K}_{A}\)</EquationSource></InlineEquation>) and basicity constants (<InlineEquation ID="IEq3"><EquationSource Format="TEX">\(\:{K}_{D}\)</EquationSource></InlineEquation>) of RB and WB were determined using both the classical Gutmann approach and the Hamieh model. Benzoin gums were found to exhibit acidic characteristics.</p>

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Determination of the surface properties and isomer pair separation powers of benzoin gums using inverse gas chromatography

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  • 发表日期：

    2026年7月9日

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  • Ayse Erdogan Cakar

摘要

Surface energy analysis of red benzoin (RB) and white benzoin (WB), and the separation power of their isomers, was performed using inverse gas chromatography (IGC). The selectivity coefficients (\(\:{\alpha\:}_{A}\)) of the structural isomers of RB and WB at infinite dilution were determined to be between 373.2 and 398.2 K for butyl acetate, butyl alcohol, amyl alcohol, and xylene isomers. IGC measurements were performed at infinite dilution to determine the specific adsorption enthalpies of the probe molecules. Based on the IGC measurements, the acidity constants (\(\:{K}_{A}\)) and basicity constants (\(\:{K}_{D}\)) of RB and WB were determined using both the classical Gutmann approach and the Hamieh model. Benzoin gums were found to exhibit acidic characteristics.