| 尿素中氮含量的示波滴定新方法 |
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| 引用本文： | 陆为林.尿素中氮含量的示波滴定新方法[J].分析测试学报,1996,15(1):63-66. |
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| 作者姓名： | 陆为林 |
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| 作者单位： | 盐城工业专科学校 |
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| 摘 要： | 研究了尿素中氮含量的示波滴定新方法，样品用硫酸消化法分解，分子中的氮转化为铵，用四苯硼钠（Ｎａ－ＴＰＢ）沉淀铵，过量的四苯硼钠用氯化四乙基铵标准溶液返滴定，以四苯硼钠示波图切口消失为终点，再计算出氮含量。本法不需要蒸馏吸收，选用无毒的滴定剂，不用外加指示剂，与通用的产品标准分析方法相比较，操作简便、快速，测定结果准确、可靠。
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| 关 键 词： | 尿素，氮，示波滴定，氯化四乙基铵 |
New Method of Oscillographic Titratil of Nitrogen Content in Urea |
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| Lu Weilin.New Method of Oscillographic Titratil of Nitrogen Content in Urea[J].Journal of Instrumental Analysis,1996,15(1):63-66. |
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| Authors: | Lu Weilin |
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| Abstract: | The thesis studied the new method for oscillographic titration of the determination of nitrogen content in urea.when the sample is heated in sulphuric acid of high concentration, the urea decomposes and the nitrogen in the urea transforms into NH,t hen oscillographic titration is conducted on NH with Na-TPB method;then at last calculate the nitrogen content.Compared with standard methods,choose unpoisonous Tetrathylammonium chloride titrant,the above one needs no distillation absorption and indicator.It has the advantages of being easy and quick in operation,and the determination result is accurate and reliable.The method is also suitable for determination of nitrogen content in various nitrogenous fertilizers. |
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| Keywords: | Urea Nitrogen Oscillopolarographic titration Tetraethyl ammonium chloride |
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