Journal Pre-proof Simultaneous determination of illegal drug substances in dietary supplements for gout and osteoporosis using ultra-performance liquid chromatography and liquid chromatography-quadrupole-time-of-flight mass spectrometry Nam Sook Kim<ce:contributor-role>Writing- Original draft preparation) (Conceptualization) (Methodology), Jihee Kim (Investigation) (Validation), Na Young Lim (Data curation)<ce:contributor-role>Writing- Reviewing and Editing), Ji Hyun Lee (Investigation), Seongsoo Park (Project administration), Hoil Kang (Supervision) PII: S0731-7085(19)32694-9 DOI: https://doi.org/10.1016/j.jpba.2019.113003 Reference: PBA 113003 To appear in: Journal of Pharmaceutical and Biomedical Analysis Received Date: 4 November 2019 Revised Date: 18 November 2019 Accepted Date: 19 November 2019 Please cite this article as: Kim NS, Kim J, Lim NY, Lee JH, Park S, Kang H, Simultaneous determination of illegal drug substances in dietary supplements for gout and osteoporosis using ultra-performance liquid chromatography and liquid chromatography-quadrupole-time-of-flight mass spectrometry, Journal of Pharmaceutical and Biomedical Analysis (2019), doi: https://doi.org/10.1016/j.jpba.2019.113003