Micro-solid phase extraction of polycyclic aromatic hydrocarbons in water using either C18 or molecularly imprinted polymer membranes: analytical merits and limitations حسب Mohd Sabari, Siti Nurul Umira, Loh, Saw Hong, Kamaruzaman, Sazlinda, Yahaya, Noorfatimah, Wan Mohd Khalik, Wan Mohd Afiq