| 影响总氮测定的关键因素研究 |
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| 引用本文： | 周英杰,王淑梅,陈少华. 影响总氮测定的关键因素研究[J]. 环境工程, 2012, 30(1): 106-110. DOI: 10.13205/j.hjgc.201201028 |
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| 作者姓名： | 周英杰 王淑梅 陈少华 |
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| 作者单位： | 中国科学院城市环境研究所城市环境与健康重点实验室,福建厦门,361021 |
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| 基金项目： | 厦门市科技计划项目，国家科技支撑计划子课题 |
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| 摘 要： | 为了解决水质分析中总氮测定的实际问题,应用GB 11894—1989《碱性过硫酸钾氧化紫外分光光度法》,从总氮测定方法的原理出发,探讨了影响总氮测定的关键因素。结果表明:在标准分析方法的基础上,要提高水样总氮分析的准确度,可采用50 mL优质比色管进行消解,选用优级纯的过硫酸钾,消解后的冷却时间需延长至2 h。
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| 关 键 词： | 总氮 紫外分光光度法 测定 关键因素 |
KEY FACTORS ON THE ACCURACY OF TOTAL NITROGEN ANALYSIS |
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| Zhou Yingjie Wang Shumei Chen Shaohua. KEY FACTORS ON THE ACCURACY OF TOTAL NITROGEN ANALYSIS[J]. Environmental Engineering, 2012, 30(1): 106-110. DOI: 10.13205/j.hjgc.201201028 |
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| Authors: | Zhou Yingjie Wang Shumei Chen Shaohua |
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| Affiliation: | Zhou Yingjie Wang Shumei Chen Shaohua(Key Laboratory of Urban Environment and Health,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China) |
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| Abstract: | To overcome the drawbacks of the total nitrogen(TN) determination in water quality analysis,the key factors influencing the TN determination were explored using the method of "Alkaline Potassium Persulfate Oxidation Digestion-UV Spectrophotometry"(GB11894—1989).The results showed that based on the standard method,the accuracy of TN determination can be improved by digesting with potassium persulfate of guarantee reagent in 50 mL high-class digestion colorimetric tube and prolonging the cooling time to 2 h after digesting. |
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| Keywords: | total nitrogen UV spectrophotometric method measurement key factors |
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