Sinaga SM, Putra EDL, Harfiansyah MD, Cintya H. Application of the Ratio Subtraction Ultraviolet Spectrophotometry Method for Simultaneous Quantification of B1, B2, B3, B6, and B12 Vitamins in Health Supplement Syrups. Trends Sci [Internet]. 2025Oct.1 [cited 2026Apr.8];23(1):11000. Available from: https://tis.wu.ac.th/index.php/tis/article/view/11000