Abstract
The aim of this study was to optimize the extraction conditions of 15 preservative allergens from skincare products using response surface methodology (RSM) and determination by gas chromatography – tandem mass spectrometry (GC-MS/MS). The optimal parameters were: 50% acetonitrile (ACN) (% v/v), a solvent/sample ratio of 80, and an extraction time of 10 min. The method provided good linearity (R 2 ≥ 0.990) from 0.01 to 2 µg/mL with low limits of detection (0.02–0.2 mg/kg) and quantification (0.04–1 mg/kg). Recoveries ranged from 70.1 to 125.6% and the relative standard deviations (RSDs) varied from 2.0 to 14.9%. The method was successfully applied to eighty skincare products to accurately quantify these preservatives allergens.
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