| 快速、准确测定化学耗氧量及消除干扰的研究 |
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| 引用本文： | 孙国铭.快速、准确测定化学耗氧量及消除干扰的研究[J].武汉大学学报(工学版),1983(1). |
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| 作者姓名： | 孙国铭 |
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| 作者单位： | 江苏省电力中心试验研究所 |
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| 摘 要： | 本文提出了一种以重铬酸钾为氧化剂在新的条件下快速及准确测定化学耗氧量(COD)的方法。文中研究了消化过程的各种条件(硫酸浓度、消化时间)。对消除氯离子的干扰也进行了详细研究,结果表明,采用硝酸银和硝酸铋联合掩蔽法可以取代标准重铬酸钾法中采用的硫酸汞法,从而可避免使用刷毒的硫酸汞。文中还研究了本方法对某些有机化合物的氧化率,测定了各种类型的水样,结果表明,本方法具有广泛的适应性,适于现场应用。
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Research for the Rapid and Accurate Determination of Chemical Oxygen Demand and the Elimination of Interference |
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| Abstract: | A method for the rapid and accurate determination of chemical oxygen demand (COD) using potassiumdichromate as oxidant under new conditions is described in this paper.Various conditions of digestion process, such as sulfuric acid concentration and digestion time, are resarched. The elimination of chloride ion interference is also researched in detail. The result shows, the united inhibitory method using silver nitrate and bismuth nitrate may replace the mercuric sulfate method in standard methods, thus, extremely toxic mercuric sulfate may be rid of. The paper also investigated this method for the oxidation capacity of some organic compounds, and determined various water samples. The result shows, this method possesses wide suitability, and is adaptable to the use in fields. |
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