Referring to the detection method of antipyrine content in Antongding injection in the first book of Chinese Veterinary Pharmacopoeia(2005),a set of solutions were prepared.Supposing the same content of antipyrine reference substance and the same pH,the c%参考《中华人民共和国兽药典二OO五年版一部》检测安痛定注射液中安替比林含量的检测方法,配制一组溶液,使安替比林对照品含量相同,pH值相同,而对二甲氨基苯甲醛试液的浓度逐渐增大,经过定容等处理,测定吸光度,排除较高或较低的吸光度,选定吸光度是0.5736的样,其中所加显色剂的量为对二甲氨基苯甲醛试液6mL。为了进一步求证该显色剂浓度的可靠性和可操作性,用定量分析法,在一系列标准曲线的各溶液和样品中加入该浓度的显色剂,测定结果表明,样品回收率是99%~105%。
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