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Updated: Jul 12, 2026

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA)
Published on: May 16, 2016
Determination of the surface properties and isomer pair separation powers of benzoin gums using inverse gas
1Department of Chemistry, Faculty of Arts & Sciences, Yildiz Technical University, Esenler, Istanbul, 34220, Turkey. aecakar@yildiz.edu.tr.
Abstract:
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 ([Formula: see text]) 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 ([Formula: see text]) and basicity constants ([Formula: see text]) of RB and WB were determined using both the classical Gutmann approach and the Hamieh model. Benzoin gums were found to exhibit acidic characteristics.
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