On permanganate oxidation of humic acids
On permanganate oxidation of humic acids
复制标题
腐殖酸的高锰酸盐氧化
DOI：
10.1016/0016-7061(77)90014-3
复制
发表时间：
1977
期刊：
影响因子：
6.1
通讯作者：
Y. Elkin
中科院分区：
文献类型：
--
作者：
O. B. Maximov;T. Shvets;Y. Elkin
用两种技术对来自高山森林土壤和来自棕色和风化烟煤的腐殖酸进行甲基化和用碱性高锰酸盐氧化。从所获得的水溶性酸的甲酯中确定存在25 - 60%的组分，所述组分在包括气相色谱的条件下是不挥发的，并且代表复杂的低聚物分解产物。在剧烈条件下的氧化，广泛用于研究土壤有机物质，伴随着初始酸结构中脂肪族和甲氧基芳族单元的主要分解。结果，从根本上不同的天然来源获得的氧化产物的组成差异被拉平。通过腐殖酸的高锰酸盐氧化形成的物质基本上是其大分子深度降解的产物，而不是原始材料中存在的“积木”。为了鉴定腐殖酸结构的特性，后者应在日益剧烈的处理条件下连续地受到氧化剂的影响。近年来，M.施尼策尔
Humic acids from an alpine-forest soil and from brown and weathered bituminous coals were methylated and oxidized with alkaline permanganate using two techniques The presence of from 25 to 60% of components that are non-volatile under conditions involving gas chromatography and that represent complex oligomeric decomposition products, was established from the methyl esters of the water-soluble acids obtained.Oxidation under drastic conditions, widely used in studying soil organic substances, was accompanied by predominant decomposition of the aliphatic and methoxyaromatic units in the structure of the initial acids. As a result, the differences in the composition of the oxidation products obtained from radically different natural sources were levelled off.The substances formed through permangenate oxidation of humic acids are essentially products of deep degradation of their macromolecules, not the “building blocks” present in the initial material.To identify the peculiarities of the structure of humic acids, the latter should successively be affected by oxidizers under conditions of increasingly drastic treatment. Various versions of this technique have successfully been developed in recent years by M. Schnitzer.