• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of the Institute of Brewing >Determination of Cu(II) in Beer by Derivative Potentiometric Stripping Analysis
【24h】

Determination of Cu(II) in Beer by Derivative Potentiometric Stripping Analysis

机译：导数电位溶出分析法测定啤酒中的铜（II）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Derivative Potentiometric-Stripping Analysis (dPSA) is described as an inexpensive and rapid method for the determination of Cu(II) in beer. Beer samples were analysed directly after degassing and addition of the analytical reagents (hydrochloric acid, mercury(II) chloride, and potassium metabisulfite). It was not necessary to digest the sample. During dPSA the metal ions are deposited on a glassy carbon-working electrode and then stripped by a suitable oxidant. Quantitative analysis was carried out by the method of standard additions. The recovery of the method was tested by adding 50 μg L~(-1), 75 μg L~(-1) and 100 μg L~(-1) of Cu(II) (as Cu(II) chloride solution) to the beer. The mean recoveries of Cu(II) ranged from 95 +- 5% to 98 +- 2%. The re-producibility was evaluated by three repetitive analyses for each sample and the standard deviation ranged from 0.6 μg L~(-1) to 5.5 μg L~(-1). The detection limit was 0.8 μg L~(-1). The Cu(II) concentration determined in seven beer samples ranged from 28 μg L~(-1) to 48 μg L~(-1) and the results obtained were not significantly different from those obtained by atomic absorption spectrophotometry (AAS).
机译：导数电位分析法（dPSA）被描述为测定啤酒中Cu（II）的一种廉价且快速的方法。脱气并添加分析试剂（盐酸，氯化汞（II）和焦亚硫酸氢钾）后，直接分析啤酒样品。无需消化样品。在dPSA期间，金属离子沉积在玻璃碳工作电极上，然后被合适的氧化剂剥离。定量分析采用标准添加法进行。通过将50μgL〜（-1），75μgL〜（-1）和100μgL〜（-1）的Cu（II）（作为氯化Cu（II）溶液）添加到该方法中，测试方法的回收率。啤酒。 Cu（II）的平均回收率范围为95±5％至98±2％。通过三个重复分析对每个样品进行重现性评估，标准偏差范围为0.6μgL〜（-1）至5.5μgL〜（-1）。检出限为0.8μgL〜（-1）。在七个啤酒样品中测定的Cu（II）浓度在28μgL〜（-1）至48μgL〜（-1）之间，所获得的结果与原子吸收分光光度法（AAS）所获得的结果没有显着差异。

著录项

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