High Throughput Screening of 86 Kinds of Glucocorticoids in Cosmetics Using QuEChERS and Isotope Dilution-Liquid Chromatography Copuled to High Resolution Time-of-Flight Mass Spectrometry
A high throughput screening method based on QuEChERS purification and stable isotope dilutionliquid chromatography coupled to high resolution time-of-flight mass spectrometry was developed for the simultaneous rapid determination of 86 kinds of glucocorticoids( GCs) in cosmetics. The analytes were extracted by acetonitrile,and then the extracts were purified using an improved QuEChERS method. The chromatographic separation was performed on a novel multiple chromatographic retention mechanisms column of Poro...