| 有机质肥料中硝酸態氮素分析方法的研究 |
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| 引用本文： | 陈尚谨. 有机质肥料中硝酸態氮素分析方法的研究[J]. 土壤学报, 1952, 2(1): 7-12 |
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| 作者姓名： | 陈尚谨 |
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| 作者单位： | 华北农业科学研究所; |
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| 摘 要： | 一、绪言硝酸态氮素定量分析,普通多使用还原法与比色法两种。但有机质肥料如厩肥、堆肥含大量有色体、尿素、氯化物等杂质,以上两种方法,都不适用。动物粪便中,每含有大量铵盐及易于分解的各程氮的化合物。无论在酸性或
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| 关 键 词： | 氮素 酚二磺酸比色法 定量分析 二氧化碳 分析方法 有机质 氯化物 一氧化氮 肥料 硝酸 |
A New Method for the Determination of Nitrate-Nitrogen in Compost and Animal Manures |
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| Shang-Chin Ch,#;n. A New Method for the Determination of Nitrate-Nitrogen in Compost and Animal Manures[J]. Acta Pedologica Sinica, 1952, 2(1): 7-12 |
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| Authors: | Shang-Chin Ch&# n |
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| Abstract: | A new method is used to determine the nitrate-nitrogen content in organic fertilizers which contain large amounts of ammonia,colored organic matter,and colloidal substances that can not be removed by usual methods. In this method the nitrate is reduced into nitric oxide by ferrous chloride and thus removed from the impurities,and then converted back into pure nitric acid by air and hydrogen peroxide.The nitric acid formed is determined by the usual phenoldisulfonic acid method. It is to be noted that this m... |
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