高速液体クロマトグラフィーによる化粧品中のカチオン系防腐殺菌剤の分析

概要

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A simple method by high performance liquid chromatography (HPLC) was developed for the simultaneous determination of 4 preservatives in cosmetics, chlorhexidine gluconate (GCH), benzalkoniumchloride (BzAC), benzethonium chloride (BzEC) and cetylpyridinium chloride (CPC). A sample of a cosmetic containing GCH, BzAC, BzEC and CPC was dissolved in tetrahydrofuran (THF) or methanol (MeOH). For the elution of BzAC, BzEC and CPC, the sample was passed through a Bondelute SCX cartridge. After washing the cartridge with MeOH. BzAC, BzEC and CPC were eluted with 0.1 M NaClO_4/MeOH. On the other hand, for the elution of GCH, the sample was passed through Bondelute CBA cartrige. After washing the cartridge with MeOH, GCH was eluted with a solution of 0.2 M KH_2PO_4-CH_3CN (1 : 1). The optimum condition for the separation by HPLC of 4 preservatives in cosmetics was as follows : column, TSK gel ODS 80 TM (4.6 mm i.d.×150 mm) ; mobile phase, CH_3CN-H_2O-THF-acetic acid (40 : 40 : 20 : 0.2) containing 0.2% sodium lauryl sulfate, 1.2 ml/min ; column temperature, 50℃ ; detection wavelength, 263 nm. Recovery of 4 preservatives in 10 samples of cosmetics (6 different types of cosmetics) was almost more than 95%. Detection limits of GCH, BzAC, BzEC and CPC were 0.00003%, 0.001%, 0.0002%, 0.00005%, respectively (S/N ratio=10,10 μl, 0.005 a.u.f.s, λ_<max>)
公益社団法人日本薬学会の論文
1995-10-31