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中华人民共和国药典(1995年版)二部规定甲硝唑注射液加氯化钠调节注射液的等渗。其氯化物检查项的叙述如下:“精密量取本品适量(约相当于甲硝唑50mg),加水至50ml、加2％糊精溶液5ml、碳酸钙0.1g与荧光黄指示液5～8滴,摇匀后,用硝酸银滴定液(0.1mol/L)滴定,至浑浊液由黄绿色变为微红色。消耗硝酸银滴定液(0.1mol/L)应为13.2～14.6ml。” 药典中规定的甲硝唑注射液规格有五种:①10ml:50mg;②20ml:100mg;③100ml:500mg;④250ml:1.25g;⑤250ml:500mg。其中规格①～④的甲硝唑注射液中甲硝唑的浓度为0.5％;规格⑤的甲硝唑注射
People’s Republic of China Pharmacopoeia (1995 edition) two provisions of metronidazole injection with sodium chloride to adjust the isotonic injection. The chloride check item is described as follows: "Precise amount of this product amount (about the equivalent metronidazole 50mg), add water to 50ml, add 2ml dextrin solution 5ml, calcium carbonate 0.1g and fluorescent yellow indicator solution 5 to 8 Drip, shake, titration with silver nitrate titration solution (0.1mol / L) until the turbid liquid changes from yellow-green to reddish staining. Consumption of silver nitrate titration solution (0.1mol / L) should be 13.2 ~ 14.6ml. Metronidazole injection specifications provided in five: ① 10ml: 50mg; ② 20ml: 100mg; ③ 100ml: 500mg; ④ 250ml: 1.25g; ⑤ 250ml: 500mg. Metronidazole metronidazole injection which specifications ① ~ ④ concentration of 0.5%; metronidazole injection ⑤ specifications