LC-MS method for the simultaneous determination of six glucocorticoids in pharmaceutical formulations and counterfeit cosmetic products

- A new LC-MS analysis of six glucocorticoids was developed and validated.
- MS/MS analysis was used for the unambiguous identification of glucocorticoids.
- The analytical methods have been applied for pharmaceutical formulations analysis.
- Screening of over the counter products for counterfeit steroids was performed.
- Two betamethasone valerate isomers were found illegally present in one cream.