...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Química Nova >Determina??o de baixas concentra??es de cobre em águas naturais por espectrofotometria de absor??o at?mica em chama usando um sistema SIA com uma coluna de poli(etilenimina)
【24h】

Determina??o de baixas concentra??es de cobre em águas naturais por espectrofotometria de absor??o at?mica em chama usando um sistema SIA com uma coluna de poli(etilenimina)

机译：使用带有聚乙烯亚胺柱的SIA系统，通过火焰原子吸收分光光度法测定天然水中的低铜浓度

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper describes a sequential injection analysis (SIA) set-up coupled to a flame atomic absorption spectrometer (FAAS) to accomplish the determination of low concentrations of copper in drinking waters. Copper is first retained under neutral media in an on-line 29x1.6 mm column filled with poly(ethylenimine) immobilised on silica gel. The retained analyte is then eluted by flowing through the column 250 mL of a nitric acid solution. The selection of 3.85 ml of sample enabled to obtain a detection limit of 0.27 mug/L and a sampling rate of about 24 samples/h. There was a good agrement between the results of 12 samples furnished by the proposed procedure and by electrothermal atomic absorption spectrometry. Repeatability assessment gave a relative standard deviation of 1.3 % after ten replicate analysis of a sample containing about 70 mug/L in copper..
机译：本文介绍了一种结合火焰原子吸收光谱仪（FAAS）的顺序注入分析（SIA）装置，以完成饮用水中低浓度铜的测定。首先将铜保留在中性介质下的在线29x1.6 mm色谱柱中，该色谱柱装有固定在硅胶上的聚（乙烯亚胺）。然后，使残留的分析物流过色谱柱中的250 mL硝酸溶液进行洗脱。选择3.85 ml的样品可使检出限为0.27杯/升，采样率约为24个样品/小时。拟议的程序和电热原子吸收光谱法提供的12个样品的结果之间有很好的一致性。在对含约70杯/升铜的样品进行十次重复分析后，重复性评估得出的相对标准偏差为1.3％。

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