Optimization of Magnetic Micro Solid-Phase Extraction Using Alginate Chitosan Amine-Functionalized Silica-Coated Adsorbent for Determination of Pyrocatechol in Coffee. JOMALISC [Internet]. 2025 May 31 [cited 2026 Jul. 15];4(1):63-8. Available from: https://jomalisc.utm.my/index.php/jomalisc/article/view/89