氯气校正法测定高氯水COD方法的标准化研究
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王文雷, 宋永超, 刘金芝, 马振国, 王振华
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Study on standardization of determination of COD in high chlorine water by chlorine emendation method
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Wenlei WANG, Yongchao SONG, Jinzhi LIU, Zhenguo MA, Zhenhua WANG
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表5 不同取样体积的水样COD测定结果
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Table 5 Results of COD in water samples with different sampling volumes
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| 项目 | 水样1〔COD （163±17） mg/L，Cl- 2 000 mg/L〕 | 0mg/L，Cl- 15000mg/L） 水样2（COD 2 | 地表水样品（Cl- 11 000 mg/L） | 石化废水样品（Cl- 2 000 mg/L） |
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| 取样20.0 mL | 171 | 21.1 | 38.1 | 114 | | 162 | 19.1 | 39.6 | 104 | | 160 | 18.9 | 39.7 | 109 | | 159 | 20.5 | 42.2 | 116 | | 173 | 20.9 | 41.8 | 106 | | 167 | 20.7 | 42.6 | 111 | | 均值 | 165 | 20.2 | 40.7 | 110 | | RE/% | 1.2 | 1.0 | — | — | | RSD/% | 3.6 | 4.8 | 4.4 | 4.2 | | 取样10.0 mL | 168 | 19.1 | 37.1 | 107 | | 179 | 21.0 | 38.2 | 102 | | 164 | 19.0 | 39.2 | 112 | | 159 | 20.7 | 38.1 | 111 | | 158 | 21.2 | 37.9 | 115 | | 169 | 20.9 | 41.3 | 106 | | 均值 | 166 | 20.4 | 38.6 | 108 | | RE/% | 1.8 | 2.0 | — | — | | RSD/% | 4.7 | 4.9 | 3.8 | 4.4 |
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