Use of the hyperbranched (hypercrosslinked) polystyrene as sorbent for solid-phase extraction at the analysis of drugs (medicines) in biological objects with high performance thin layer chromatography (HPTLC). sorpchrom [Internet]. 2019 Nov. 27 [cited 2026 Apr. 4];10(1). Available from: https://journals.vsu.ru/sorpchrom/article/view/2015