Castor oil samples were diluted in alcohol prior to analysis. No external standards were used for this analysis in an attempt to use the charged aerosol detector’s unique homogeneity of relative response factors across analytes. This can sometimes be complicated with all nebulizerbased detectors, as analyte response is dependant on nebulizer efficiency, which changes with the amount of organic solvent present in the column eluent. However, because the gradient used in this method is largely organic with little change in water content, response factors should be similar to those seen with analyses where nebulizer efficiency is maintained