An XPS Study of Nitrogen Structures in Soil Humic Substances

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An XPS Study of Nitrogen Structures in Soil Humic Substances

机译：土壤腐殖质氮结构的XPS研究

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X-ray photoelectron spectroscopy (XPS) was applied to examine the N structures of soil humic substances and some of their analogues. It was found that for soil humic substances XPS method gave similar results as those obtained by 15N CPMAS NMR (cross-polarization magic-angle spinning nuclear magnetic resonance) method. 70%～86% of total N in soil humic substances was in the form of amide, and 6%～13% was presented as amines, with the remaining part as heterocyclic N. There was no difference in the distribution of the forms of N between the humic substances from soils formed over hundreds or thousands of years and the newly formed ones. For fulvic acid from weathered coal and benzoquinone-(NH4)2SO4 polymer the XPS results deviated significantly from the 15N CPMAS NMR data.

机译：X射线光电子能谱法（XPS）用于检查土壤腐殖质及其类似物的N结构。研究发现，对于土壤腐殖质，XPS方法获得的结果与15N CPMAS NMR（交叉极化魔角旋转核磁共振）方法获得的结果相似。土壤腐殖质中总氮的70％〜86％为酰胺形式，胺为6％〜13％，其余为杂环氮。氮的形态分布无差异在数百或数千年形成的土壤中的腐殖质与新形成的腐殖质之间。对于来自风化煤和苯醌-（NH4）2SO4聚合物的黄腐酸，XPS结果与15N CPMAS NMR数据有明显差异。

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《土壤圈（英文版）》 |2001年第4期|321-326|共6页
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Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 China;

Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 China;

Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类土壤学;
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An XPS Study of Nitrogen Structures in Soil Humic Substances

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