The used apparatus was equipped witha split/splitless injector. Individual compounds (5-n-heptadecylresorcinol,5-n-nonadecylresorcinol, 5-n-heneicosylresorcinol, 5-n-tricosylresorcinol and 5-n-pentacosylresorcinol) were quantified against the internal standard by automatically integrating the peak areas. Finally, the results were expressed as the sum of the identified ARs.