| 原子吸收法测定环境水样中化学需氧量 |
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| 引用本文： | 肖开提·阿布力孜,王吉德,鹿毅,沙迪尔.原子吸收法测定环境水样中化学需氧量[J].分析试验室,1999,18(3):90-92. |
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| 作者姓名： | 肖开提·阿布力孜 王吉德 鹿毅 沙迪尔 |
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| 作者单位： | 1. 新疆大学化学系,乌鲁木齐,830046
2. 新疆技术监督局 |
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| 摘 要： | 在Ｈ２ＳＯ４介质中用Ｋ２Ｃｒ２Ｏ７同ＣＯＤ水样反应，反应后水相中过量的Ｃｒ（Ⅵ）以Ｃｒ２Ｏ２－７形式被ＴＯＡ萃入有机相中，而生成的Ｃｒ（Ⅲ）则留在水相，用ＡＡＳ测定有机相中的Ｃｒ（Ⅵ）或水相中的Ｃｒ（Ⅲ）都可求得ＣＯＤ含量。本法简便快速、需样量少、且测定结果同标准方法（ＣＯＤＣｒ法）一致，回收率为９８％～１０８％，平均标准偏差为３．３％。
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| 关 键 词： | 原子吸收法 化学需氧量 环境分析 |
| 文章编号： | 1000-0720(1999)
03-090-03 |
Determination of Chemical Oxygen Demand in Aqueous samples by AAS |
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| Xawkat·Abliz,WANG Ji-de,LU Yi,adir.Determination of Chemical Oxygen Demand in Aqueous samples by AAS[J].Chinese Journal of Analysis Laboratory,1999,18(3):90-92. |
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| Authors: | Xawkat·Abliz WANG Ji-de LU Yi adir |
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| Abstract: | his paper investigated an indirect
AAS method for determining chemical oxygen demand in aqueous samples.K2Cr2O7 reagent
was added to the sample solution to react with organic substances in H2SO4 medium,after
reaction Cr2O2-7 in the solution was extracted into organic phase of TOA,and the Cr() produced
remained in the solution,Cr() in teh organic phase or Cr() in the aqueous solution was
determinaed by AAS.The contents of COD in samples could be obtained.This method is
simple,fast,and of microscale ,the results agreed well with those obtained by volumetric
method.The recoveries are between 98%108% and the average relative standard deviation is 3.
3%. |
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| Keywords: | Atomic absorption spectrometry chemical oxygen demand environmental analysis |
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