title: High-performance liquid chromatography-diode array and electrospray-mass spectrometry analysis of non-allowed substances in cosmetic products for preventing hair loss and other hormone-dependent skin diseases.
abstract: A simple high-performance liquid chromatography (HPLC) method with ultraviolet diode array (UV-DAD) and electrospray ionisation mass spectrometry (ESI-MS) detection has been developed for the determination of minoxidil, progesterone, estrone, spironolactone, canrenone, hydrocortisone and triamcinolone acetonide in cosmetic products. The presence of these substances in commercial cosmetic samples is prohibited. The compounds were separated by reversed phase chromatography with water (0.1% trifluoroacetic acid) and acetonitrile gradient elution and detected by UV-DAD at 230, 254 and 280 nm and by ESI-MS positive ionisation mode. Benzoic acid was used as internal standard. Linearity was studied with UV-DAD detection from 1.50 to 1,000 microg/ml or mug/g range, depending on the different compounds and type of cosmetic preparation and with ESI-MS in the 50-1,000 ng/ml or ng/g range. Good determination coefficients (r(2)>or=0.99) were found in both UV and ESI-MS. At three concentrations spanning the linear dynamic ranges of both UV-DAD and ESI-MS assay, mean recoveries were always higher than 90% for the different analytes. This method was successfully applied to the analysis of substances under investigations illegally added in cosmetic cream and lotions, sold on internet web sites to prevent hair loss and other hormone-dependent skin diseases, like acne and hirsutism.
authors.affiliation: Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanità, V.le Regina Elena 299, 00161 Rome, Italy.
authors.forename: Daniela
authors.initials: D
authors.lastname: De Orsi
authors.forename: Manuela
authors.initials: M
authors.lastname: Pellegrini
authors.forename: Simona
authors.initials: S
authors.lastname: Pichini
authors.forename: Donatella
authors.initials: D
authors.lastname: Mattioli
authors.forename: Emilia
authors.initials: E
authors.lastname: Marchei
authors.forename: Luigi
authors.initials: L
authors.lastname: Gagliardi
mesh_terms: D000505:Alopecia / Q000517:prevention & control*; D019817:Benzoic Acid / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003358:Cosmetics / Q000032:analysis*; D005607:Fraud / Q000517:prevention & control*; D004364:Pharmaceutical Preparations / Q000592:standards*; D012015:Reference Standards; D015203:Reproducibility of Results; D012871:Skin Diseases / Q000517:prevention & control*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
chemical_list: D003358:Cosmetics; D004364:Pharmaceutical Preparations; D019817:Benzoic Acid