Detection and Temporal Variation of Malachite Green in the Sepang River Using Solid Phase Extraction and Spectrophotometry. J Environ Microbiol Toxicol [Internet]. 2024 Dec. 30 [cited 2026 May 11];12(2):63-7. Available from: https://journal2.hibiscuspublisher.com/index.php/JEMAT/article/view/1031