Abstract: The method of ion exclusion chromatography to detect boric acid and salt in cosmetics was established.After pretreatment of the samples,the boric acid and salt in samples was separated on ICS1100 ion chromatography system using IonPac ICE-borate ion exclusion column which has a good selectivity for borate radicals as analysis column,with methane sulfonic acid-mannitol as eluent,and suppressed conductivity detector to detect boric acid salts in cosmetics.Results showed that boric acid salt detection limit of this method is 0.57 mg/kg;the limit of quantification is 1.9 mg/kg;the recovery is in the range of 87%-108%,with good recovery and reproducibility.

Key words: cosmetics, borate, ion exclusion chromatography