Jajuli, M.N. and Herzog, G. and Hébrant, M. and Poh, N.E. and Rahim, A.A. and Saad, B. and Hussin, M.H. (2021) Graphene and zeolite as adsorbents in bar-micro-solid phase extraction of pharmaceutical compounds of diverse polarities. RSC Advances, 11 (27). pp. 16297-16306. ISSN 20462069