| 环境水中化学需氧量的反向流动注射分析法研究 |
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| 引用本文： | 陈慧,安太成,房彦军,全晓塞.环境水中化学需氧量的反向流动注射分析法研究[J].岩矿测试,1999,18(3). |
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| 作者姓名： | 陈慧 安太成 房彦军 全晓塞 |
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| 作者单位： | 1. 西北师范大学化学系,兰州,730070
2. 宁夏大学化学化工系,银川,750021 |
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| 基金项目： | 甘肃省自然科学基金,甘肃省环保局科学技术资助 |
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| 摘 要： | 研究了Ｃｅ（ＳＯ４）２Ｈ２ＳＯ４体系反向流动注射分析法测定环境水中化学需氧量（ＣＯＤ）的试验条件。在２．５～１６０．０ｍｇ／Ｌ线性范围内，采样频率达到２５／ｈ，Ｃｌ－的质量浓度至２５００ｍｇ／Ｌ无干扰。对６０ｍｇ／Ｌ的标准试样重复测定１１次，相对标准偏差为０．７９％，检出下限为２．５ｍｇ／Ｌ。该法便于实际工作中ＣＯＤ的连续监测，用于河水、池塘水分析，获得结果与经典的重铬酸钾法相对照，相关性良好
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| 关 键 词： | 化学需氧量 反向流动注射分析 环境水 |
Study on Determination of COD in Natural Water by Reversed Flow Injection Analysis |
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| CHEN Hui,AN Tai-cheng,FANG Yan-jun,QUAN Xiao-sai.Study on Determination of COD in Natural Water by Reversed Flow Injection Analysis[J].Rock and Mineral Analysis,1999,18(3). |
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| Authors: | CHEN Hui AN Tai-cheng FANG Yan-jun QUAN Xiao-sai |
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| Abstract: | A system of Ce(SO4)2H2SO4 for determination of COD in natural water samples by reversed flow injection analysis is discussed. In the linear range of 2.5160.0 mg/L for COD concentration, the sampling frequency of 25/h is obtained. Up to 2500 mg/L of Cl- does not interfere with determination of COD. The detection limit of the method for COD is 2.5 mg/L. Precision of the determination for the sample with 60 mg/L of COD is 0.79% RSD (n=11). The method has been applied to the online determination of COD in river and pool water and the results are in agrecment with traditional method using potassium dichromate.\=\= |
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| Keywords: | chemical oxygen demand(COD) reversed flow injection analysis natural water |
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