Setyawati, Amri. 2020. “Analysis Methods Verification of Boron in River Water Using the Uv-Vis Spectrophotometer With Curcumin Complex As Alternative Practical Educations”. IJCER (International Journal of Chemistry Education Research) 3 (2):60-65. https://doi.org/10.20885/ijcer.vol3.iss2.art2.