应用化学

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茚三酮为显色剂分光光度法测定氨苄西林钠

张亚秋   

  1. (辽宁医学院药学院 锦州 121001)
  • 收稿日期:2011-04-19 修回日期:2011-07-05 出版日期:2012-03-10 发布日期:2012-03-10
  • 通讯作者: 张亚秋,高级实验师; Tel:0416-4673316; Fax:0416-2832464; E-mail:zyqzyq168@163.com; 研究方向:药物分析

Spectrophotometric Determination of Ampicillin Sodium Using Ninhydrin as Chromogenic Agents

ZHANG Yaqiu   

  1. (Pharmaceutical College of Liaoning Medical University,Jinzhou  121001)
  • Received:2011-04-19 Revised:2011-07-05 Published:2012-03-10 Online:2012-03-10

摘要: 采用分光光度法研究了氨苄西林钠与茚三酮间的显色反应。 确定了反应条件,建立了一种快速、简便测定氨苄西林钠的分光光度法。 实验表明,氨苄西林钠与茚三酮在pH=5.4的水溶液中,沸水浴1 h可以反应完全,产物在λmax=564 nm下,表观摩尔吸光系数为3.72×103 L/(mol·cm)。 氨苄西林钠质量浓度在10~90 mg/L范围内服从比耳定律, 相关系数为0.9981,当氨苄西林钠浓度为40 mg/L时,测定结果的相对标准偏差为1.5%(n=6),回收率在99.0%以上。

关键词: 氨苄西林钠, 茚三酮, 分光光度法

Abstract: The reaction between ampicillin sodium and ninhydrin was investigated by spectrophotometry. A simple and rapid method for the determination of ampicillin sodium has been optimized. The apparent molar absorptivity of complex is 3.72×103 L/(mol·cm) at 564 nm. Beer′s law could be followed in the range of 10~90 mg/L of ampicillin sodium with correlation coefficient of 0.9981. The relative standard deviation is 1.5%(n=6) and the recovery was over 99.0%.

Key words: spectrophotometry, ampicillin sodium, ninhydrin

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