四苯硼钠法测定吡哌酸含量

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介绍一种测定吡哌酸含量的有效方法.在pH=3.6的HAc-NaAc缓冲溶液中,吡哌酸与四苯硼钠可形成1:1的定量沉淀,待沉淀反应完全后,以溴酚蓝为指示剂,用烃铵盐标准溶液回滴过量的四苯硼钠,方法简便、快速,应用于吡哌酸原料药样品测定,其回收率为99.44%~100.09%,最大相对误差<±0.6%,与药典法测得的结果基本一致. An effective method for determining the content of pipemidic acid is described in this paper.It is found that the ratio of pipemidic acid to sodium tetraphenylborate can be 1: 1 in HAc-NaAc buffer solution at pH = 3.6. After the precipitation reaction is complete, Blue as an indicator, with an excess of sodium tetraphenylborate sodium standard solution back to the excess, the method is simple and rapid, used in the determination of piperazine acid raw material samples, the recovery was 99.44% ~ 100.09%, the maximum relative error <± 0.6%, and the results of the pharmacopoeia measured basically the same.
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