| 用自动凯氏定氮仪测定水中氨氮 |
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| 引用本文： | 朱亚民,杨玲洁.用自动凯氏定氮仪测定水中氨氮[J].化学分析计量,2007,16(2):37-39. |
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| 作者姓名： | 朱亚民 杨玲洁 |
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| 作者单位： | 上海赛科石化公司实验室,上海,201507 |
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| 摘 要： | 用MgO控制预蒸馏水中的pH值,以硼酸溶液为吸收液,用稀硫酸进行中和滴定,用自动凯氏定氮仪测试水中的氨氮,检测下限为1mg/L,相对标准偏差在0.32%~1.04%范围内,加标回收率为96%~104%,并将该法与纳氏试剂比色法和离子色谱法进行了比较。
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| 关 键 词： | 氨氮 凯氏定氮仪 中和滴定 |
| 修稿时间： | 2007年1月10日 |
DETERMINATION OF AMMONIA NITROGEN IN WATER BY AUTO-KJELDAHL UNIT |
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| Zhu Yamin,Yang Lingjie.DETERMINATION OF AMMONIA NITROGEN IN WATER BY AUTO-KJELDAHL UNIT[J].Chemical Analysis And Meterage,2007,16(2):37-39. |
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| Authors: | Zhu Yamin Yang Lingjie |
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| Abstract: | Ammonia nitrogen in water was determined by auto-kjeldahl unit, MgO was used as a regulator to control pH of sample in the predistillation. Boric acid solution was used as an absorbent, and vitriol standard solution was used as a titration reagent. The result of determination were compared with that of nessler method and IC method. The determination limit was 1 mg/L. The recoveries were 96%-104%, and the RSD were 0.32%-1.04%. |
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| Keywords: | ammonia nitrogen Kjeldahl unit neutralization titration |
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