Detection of related substances in vitamin D drops (soft capsules) by SPE-HPLC
XIE Zhi-cai, YANG Li-na, PAN Han, XU Qing-jun, LU Da-feng, LI Shu-ying, XIE Qiang-sheng
Chinese Journal of Pharmaceutical Analysis . 2024, (7): 1238 -1245 .  DOI: 10.16155/j.0254-1793.2023-0441