| 重铬酸钾标准法测定化学需氧量的改进 |
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| 引用本文： | 隋峰,于清,王晓云,Wang Xiaoyun.重铬酸钾标准法测定化学需氧量的改进[J].化学分析计量,2005,14(4):48-49. |
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| 作者姓名： | 隋峰 于清 王晓云 Wang Xiaoyun |
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| 作者单位： | 山东省计量科学研究院,济南,250014;山东省化工研究院,济南,250014 |
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| 摘 要： | 重铬酸钾标准法测定水样的COD存在耗时长、汞盐二次污染和氯离子干扰等缺陷。通过提高反应的酸度、加入硫酸银催化剂等对该测定方法进行改进,改进后的方法操作简便,与标准方法相比,测定结果的相对误差在±5%以内,回收率为96.3%～100.3%。
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| 关 键 词： | 重铬酸钾标准法 改进 COD 测定 |
| 修稿时间： | 2005年5月12日 |
IMPROVEMENT OF THE DETERMINATION OF CHEMICAL OXYGEN DEMAND BY POTASSIUM DICHROMATE STANDARD METHOD |
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| Sui Feng,Yu Qing Wang Xiaoyun.IMPROVEMENT OF THE DETERMINATION OF CHEMICAL OXYGEN DEMAND BY POTASSIUM DICHROMATE STANDARD METHOD[J].Chemical Analysis And Meterage,2005,14(4):48-49. |
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| Authors: | Sui Feng Yu Qing Wang Xiaoyun |
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| Abstract: | The main defects of the standard method for the determination of chemical oxygen demand in water by potassium dichromate, such as measurement time consuming, Hg salt polluting, Cl~- disturbance were ameliorated by increasing acidity and adding catalyst silver sulfate. The improved method was simple, the relative errors were in the range of -5%~5% compared with the standard method, the recoveries were 96.3%~103.0%. |
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| Keywords: | potassium dichromate standard method ameliorate chemical oxygen demand determination |
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