| 水样的代表性和滴定剂浓度对重铬酸钾法测定化学需氧量的影响 |
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| 引用本文： | 张洪.水样的代表性和滴定剂浓度对重铬酸钾法测定化学需氧量的影响[J].四川环境,2009,28(1):41-42. |
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| 作者姓名： | 张洪 |
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| 作者单位： | 通州市环境监测站,江苏,通州226300 |
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| 摘 要： | 化学需氧量测定中，样品的代表性和滴定的误差直接影响结果的准确性。采用水浴超声器均化水样，可提高样品的代表性，通过调整滴定液硫酸亚铁铵标准溶液的浓度，可以减小滴定的误差，从而提高结果的准确性。
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| 关 键 词： | 化学需氧量 样品代表性 重铬酸钾法 |
Effect of Sample Representativeness and Titrant Concentration on Determination of COD in Potassium Dichromate Test |
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| ZHANG Hong.Effect of Sample Representativeness and Titrant Concentration on Determination of COD in Potassium Dichromate Test[J].Sichuan Environment,2009,28(1):41-42. |
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| Authors: | ZHANG Hong |
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| Institution: | ZHANG Hong ( Tongzhou Environment Monitoring Station, Tongzhou, Jiangsu 226300, China) |
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| Abstract: | In determination of COD, the representativeness of water sample and the titration inaccuracy directly affect the accuracy of the result. The sample representativeness could be enhanced by ultrasonic homogenization in water-bath; and the titration inaccuracy could also be minimized by adjusting the concentration of the ferrous ammonium sulphate in the standard solution. Therefore the accuracy of determination could be improved. |
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| Keywords: | COD sample representativeness potassium dichromate method |
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