The absorbance value was measured at 556 nm,and the content was calculated by external standard,. in order to establish UV-VIS method for the determination of content of Na2S2O5 in phentolamine mesylate injection by using UV-VIS method with 0.01 % EDTA solution as solvent,adding 2 mL of 0.05 % basic fuchsin and 3 mL of 0.3% formaldehyde solution,shaking well,color reaction for 20 min. Results showed that Na2S2O5 had good linear relationship within the range of 0.126 96~1.904 4 μg·mL-1 (r=0.999 9), its average recovery rate was 101.01 %, with an RSD of 0.8 % (n=9). The solution was determined within 1 h. Repeatability with good results. The established method is simple, accurate and good exclusivity and suitable for the determination of Na2S2O5 content in phentolamine methylate injection.
王 皖,李钰鑫,陈鸿玉,王晓菲. 分光光度法测定甲磺酸酚妥拉明注射液中焦亚硫酸钠的含量[J]. 煤炭与化工, 2025, 48(4): 148-151,160..
Wang Wan, Li Yuxin, Chen Hongyu, Wang Xiaofei. Determination of content of sodium pyrosulfite in phentolamine mesylate injection by UV-VIS Method. CCI, 2025, 48(4): 148-151,160..