| 校正系数法测定高氯离子废水中的COD |
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| 引用本文： | 陆喜红,严瑾,杨丽莉,朱晓蕾.校正系数法测定高氯离子废水中的COD[J].化学分析计量,2010,19(2):58-60,63. |
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| 作者姓名： | 陆喜红 严瑾 杨丽莉 朱晓蕾 |
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| 作者单位： | 南京市环境监测中心站,南京,210013 |
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| 摘 要： | 采用校正系数法对测定高氯离子废水中的化学需氧量(COD)进行氯离子干扰校正。实际样品测定时,先加入浓硫酸消解,将水样中氯离子全部氧化,再加入硫酸银进行样品催化氧化,通过滴定得到COD表观值,扣除氯离子校正值后得到样品COD真实值。方法适合于高氯离子低COD样品的测定。
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| 关 键 词： | COD 氯离子 废水 校正系数 |
DETERMINATION OF COD IN HIGH CHLORINE ION WASTE WATER BY CORRECTION COEFFICIENT METHOD |
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| Lu Xihong,Yan Jin,Yang Lili,Zhu Xiaolei.DETERMINATION OF COD IN HIGH CHLORINE ION WASTE WATER BY CORRECTION COEFFICIENT METHOD[J].Chemical Analysis And Meterage,2010,19(2):58-60,63. |
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| Authors: | Lu Xihong Yan Jin Yang Lili Zhu Xiaolei |
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| Institution: | ( Nanjing Environmental Monitoring Center, Nanjing 210013, China) |
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| Abstract: | Correction coefficient method was used to correct the impact of chloride ion in waste water when measuring COD. When the sample was analyzed, dense HE SO4 was added during the first 30 minutes, so that the chlorine ion could be oxidized completely. Then Ag：SO4 was added, and the reaction went on for another 90 minutes to measure the total COD. The real COD of the sample could be obtained by subtract the correction value of chlorine ion from the total COD, the former could be fined from the correction coefficient when the chlorine ion concentration was known. This method is suitable for determining the COD value in high chlorine ion waste water. |
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| Keywords: | COD |
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