Khoshhesab ZM. Magnetic Solid Phase Extraction of Au(III) using Fe3O4 Nanoparticles Prior to its Flame Atomic Absorption Spectrometric Determination. JAC [Internet]. 2017 Apr. 24 [cited 2024 May 7];6(2):990-8. Available from: https://rajpub.com/index.php/jac/article/view/6581