Abstract
In order to develop separation processes and analytical methods for aromatic carboxylic acids for the coal oxidation products, the separation behavior of aromatic carboxylic acids on a reversed‐phase HPLC using eluent containing quaternary ammonium salt was optimized using the solvent gradient method. This method was applied for the analysis of Loy Yang coal oxidation products. It was confirmed that the analytical data using this method were consistent with those determined using gas chromatography.
Acknowledgement
This research was supported by a Grant‐in‐Aid from the Ministry of Education, Culture, Sports, Science and Technology, Japan. The authors greatly appreciate Dr. D. Rash and Professor W. R. Jackson of Monash University for the coal oxidation experiment.