首页> 外文期刊>Croatica Chemica Acta >Flow-injection Spectrophotometric Determination of N-acetyl-L-cysteine Based on Coupled Redox-complexation Reaction
【24h】

Flow-injection Spectrophotometric Determination of N-acetyl-L-cysteine Based on Coupled Redox-complexation Reaction

机译:偶合氧化还原络合流动注射分光光度法测定N-乙酰基-L-半胱氨酸

获取原文
获取原文并翻译 | 示例
           

摘要

A flow-injection spectrophotometric method is developed for determination of N-acetyl-L-cysteine (NAC) in pharmaceutical formulations. The method is based on coupled redox-complexation reaction, the first step of which is the reduction of Fe~(111) by NAC; the second one includes the complexation of Fe", resulting from the preceding redox reaction, with 2,4,6-tripyridyl-.s-triazine (TPTZ). The stable Fe(TPTZ)_2~(2+ )complex exhibits an absorption maximum at X = 593 nm. Under experimental conditions, optimized by univariate method, a linear calibration curve is established in NAC concentration range from 6.0 x l0~(-6)mol L~(-1) to 2.0 x lO~(-4)mol LT~(-1) with NAC detection limit of 2.0 x 10~(-6)mol L '. The analytical frequency was 60 h~(-1). Usual excipients used as additives in Pharmaceuticals do not interfere with the analysis of NAC. The proposed method is simple, rapid, sensitive, accurate and precise (repeatability RSD 0.29 %, n = 10), and can be applied for determination of NAC in pharmaceutical formulations up to nano-mole quantity.
机译:建立了一种流动注射分光光度法,用于测定药物制剂中的N-乙酰基-L-半胱氨酸(NAC)。该方法基于偶联的氧化还原-络合反应,第一步是通过NAC还原Fe〜(111)。第二个是由前面的氧化还原反应产生的Fe“与2,4,6-三吡啶基-.s-三嗪(TPTZ)的络合。稳定的Fe(TPTZ)_2〜(2+)络合物具有吸收作用X = 593 nm时的最大值。在实验条件下,通过单变量方法优化,在NAC浓度范围从6.0 x l0〜(-6)mol L〜(-1)至2.0 x lO〜(-4)时建立了线性校准曲线)LT〜(-1)mol,NAC检出限为2.0 x 10〜(-6)mol L'。分析频率为60 h〜(-1)。在制药中用作添加剂的常用赋形剂不会干扰分析该方法简便,快速,灵敏,准确,准确(可重复性RSD为0.29%,n = 10),可用于测定纳摩尔量以下的药物制剂中的NAC。

著录项

  • 来源
    《Croatica Chemica Acta》 |2011年第1期|p.81-86|共6页
  • 作者单位

    Department of Analytical Chemistry, Faculty of Chemistry and Technology,University of Split, Teslina 10/V, 21000 Split, Croatia;

    Department of Analytical Chemistry, Faculty of Chemistry and Technology,University of Split, Teslina 10/V, 21000 Split, Croatia;

    Department of Analytical Chemistry, Faculty of Chemistry and Technology,University of Split, Teslina 10/V, 21000 Split, Croatia;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    n-acetyl-l-cysteine; flow-injection spectrophotometry; pharmaceuticals;

    机译:n-乙酰基-1-半胱氨酸;流动注射分光光度法药品;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号