13C NMR Spectra and Elemental Composition of Fractions with Different Particle Sizes from an Andosol Humic Acid
13C NMR Spectra and Elemental Composition of Fractions with Different Particle Sizes from an Andosol Humic Acid
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Andosol 腐植酸不同粒径级分的 13C NMR 谱和元素组成
DOI：
10.1080/00380768.1999.10409350
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发表时间：
1999
影响因子：
2
通讯作者：
M. Kawahigashi
中科院分区：
文献类型：
--
作者：
N. Fujitake;M. Kawahigashi
用连续凝胶渗透色谱法测定了翁布里亚土中胡敏酸的6种不同粒度级分（3 K、10 K、30 K、100 K、300 K和500 K）的元素组成和溶液~（13）C NMR谱。粒度级分的元素组成明显彼此不同。氮和氢的含量随着粒径的增大而增加。中、小粒径组（3 K ~ 100 K）的氢、氮含量较低，与典型的土壤胡敏酸相当，而大粒径组（300 K和500 K）的氢、氮含量则分布在其它胡敏酸的范围内。随着颗粒尺寸的增加，HIC比增加，而O/H降低。在HIC与OIC图中，在具有低腐殖化度的腐殖酸周围区域观察到大粒径组分（300 K和500 K）。化学结构特性的变化...
Abstract Elemental composition and solution 13C NMR spectra for six humic acid fractions with different particle sizes (i.e. 3K, 10K, 30K, l00K, 300K, and 500K) which were prepared from a humic acid in an Umbric Andosol by successive gel permeation chromatography were determined. Elemental composition of the particle size fractions clearly differed from one another. Contents of nitrogen and hydrogen increased with the increase of the particle size. Small and middle particle size fractions (3K to l00K) showed low contents of hydrogen and nitrogen corresponding to those in typical Andosol humic acids, while the contents in the large fractions (300K and 500K) were distributed in the ranges of those in the other humic acids. As the particle size increased, the HIC ratio increased whereas the O/H decreased. In the HIC versus OIC diagram, the large particle size fractions (300K and 500K) were observed in the area around humic acids with a low humification degree. Variation of the chemical structural properties ...