基于绿色考虑的碱金属氢氧化物浓度的测定

胡新, 尹富玲, 杨军, 赵明

Determination of Alkali Hydroxide Concentration Based on Green Consideration

Xin Hu, Fuling Yin, Jun Yang, Ming Zhao

Fig 3 Visual colorimetric determination of KOH concentration. (I) Reference solution RS1: oxalic acid (25.00 mL, 0.05003 mol∙L-1) plus 3 drops of BTP (0.2 mL, 25 mg∙mL-1) titrated with KOH sample solution until pH 8-10; (II) 3 drops of BTP (0.2 mL, 25 mg∙mL-1) plus 44.50 mL distilled water; (III) 3 drops of BTP (0.2 mL, 25 mg∙mL-1) plus oxalic acid (25.00 mL, 0.05003 mol∙L-1) and 29.50 mL distilled water; (IV), (V) & (VI) oxalic acid (25.00 mL, 0.05003 mol∙L-1) plus 3drops of BTP (0.2 mL, 25 mg∙mL-1) titrated with KOH sample solution at the endpoint.