| 过硫酸钾氧化法测总氮的改进方法探讨 |
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| 引用本文： | 宋月英.过硫酸钾氧化法测总氮的改进方法探讨[J].云南环境科学,2012(3):80-82. |
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| 作者姓名： | 宋月英 |
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| 作者单位： | 曲靖市环境监测站,云南曲靖655000 |
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| 摘 要： | 对过硫酸钾氧化法测总氮应该注意的问题进行了实验研究,得出结论：为了控制精度最好使用无氨水和蒸馏水,过硫酸钾使用前应该进行2次重结晶,氢氧化钠溶液的浓度应该控制在12g/L左右,测定样品置于灭菌器中必须保证压力达到0.1～0.4MPa,消解温度控制在126℃～127℃为宜,消解时间应该≮50min。
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| 关 键 词： | 过硫酸钾 总氮 测定 方法 改进 |
Improvement in Total Nitrogen Determination by Using Potassium Persulfate Oxidation Method |
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| SONG YUE-ying.Improvement in Total Nitrogen Determination by Using Potassium Persulfate Oxidation Method[J].Yunnan Environmental Science,2012(3):80-82. |
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| Authors: | SONG YUE-ying |
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| Institution: | SONG YUE-ying (Qujing Environmental Monitoring Station,Qujing Yunnan 655000 China) |
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| Abstract: | The experiment shows that during the determination of total nitrogen by potassium persulfate oxidation method,for accuracy control the water without ammonia and the distilled water would be better used,the recrystallization should be done twice before using potassium sulfate,the concentration of sodium hydroxide solution should be controlled at about 12 g/L,the pressure of the sample sterilizer be kept at 0.1-0.4 Mpa,the temperature of digestion be kept between 126℃-127℃,and the time of digestion should be not less than 50 minutes. |
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| Keywords: | potassium persulfate total nitrogen determination method improvement |
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