Screening for multiple weight loss and related drugs in dietary supplement materials by flow injection tandem mass spectrometry and their confirmation by liquid chromatography tandem mass spectrometry

- We screen for sibutramine and phenolphthalein drugs in dietary supplements.
- We use flow injection tandem mass spectrometry (FI/MS-MS).
- We show semi-quantification of the drugs in dietary supplements by FI-MS/MS.
- We show quantification of the drugs in dietary supplements by LC-MS/MS.
- We compare the results from FI-MS/MS and LC-MS/MS.