LIMITATIONS OF XAD RESINS FOR THE ISOLATION OF THE NONCOLLOIDAL HUMIC FRACTION IN SOIL EXTRACTS AND AQUATIC SAMPLES

被引：33

作者：

TOWN, RM ^{[1
]}

POWELL, HKJ ^{[1
]}

机构：

[1] UNIV CANTERBURY,DEPT CHEM,CHRISTCHURCH 1,NEW ZEALAND

来源：

ANALYTICA CHIMICA ACTA | 1993年 / 271卷 / 02期

关键词：

GEL PERMEATION CHROMATOGRAPHY; EXTRACTION; HUMIC SUBSTANCES; SOILS; WATERS; XAD RESINS;

D O I：

10.1016/0003-2670(93)80045-M

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

XAD resins are widely used to isolate aquatic humic substances. In this work the molecular adsorption and subsequent desorption of a soil humic acid on XAD-2, 4, -7 and -8 was studied. Gel permeation chromatography established that size-exclusion effects were operative; large humic molecules (MW > 30000) were not significantly adsorbed by these XAD resins. These results highlight the operational definition of humic substances isolated via XAD resins.

引用

页码：195 / 202

页数：8

共 20 条

[1]

AIKEN G, 1985, HUMIC SUBSTANCES SOI

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