Zhekov Z. METHOD AND SPECTROPHOTOMETRIC EQUIPMENT FOR WATER RESEARCH: METHOD AND SPECTROPHOTOMETRIC EQUIPMENT FOR WATER RESEARCH. JSAR [Internet]. 2023 Mar. 8 [cited 2024 Nov. 7];5(1):70-5. Available from: https://jsar.ftn.shu.bg/ojs-3.3.0-7/index.php/jsar/article/view/111