Hongkrengkai R, Tratip J, Rittisak S, Kumtabtim U. METHOD DEVELOPMENT FOR METAL ANALYSIS USING BOUGAINVILLEA FLOWER EXTRACTS AND ULTRAVIOLET-VISIBLE SPECTROSCOPY TECHNIQUE. SWU J. Sci. Technol. [internet]. 2024 Apr. 30 [cited 2026 Aug. 29];16(31, January-June):1-15, Article 253637. available from: https://ph02.tci-thaijo.org/index.php/swujournal/article/view/253637