Abstract
The emetic principles, emetine (EM) and cephaeline (CP), in ipecac syrup were simultaneously analyzed after direct dilution with distillede water, without any other pretreatment. The separation of EM and CP was accomplished by high-performance liquid chromatography (HPLC) with a reversed-phase column, and peaks corresponding to EM and CP were examined by electron ionization-mass spectroscopy (El-MS). We decribe the conditions for the quantitative analysis of EM and CP by HPLC.