THE EFFECTS OF MAGNETITE ON OXALATE-EXTRACTABLE AND DITHIONITE-EXTRACTABLE IRON

被引：75

作者：

WALKER, AL ^{[1
]}

机构：

[1] US GEOL SURVEY,MENLO PK,CA 94025

来源：

SOIL SCIENCE SOCIETY OF AMERICA JOURNAL | 1983年 / 47卷 / 05期

关键词：

CHEMICAL OPERATIONS - Extraction - IRON DEPOSITS - Evaluation;

D O I：

10.2136/sssaj1983.03615995004700050036x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Six soils from a chronosequence were chosen to test the effects of magnetite on using free Fe to estimate relative ages of soils. The acid-ammonium oxalate and dithionite-citrate-bicarbonate methods were used to extract the free Fe from the samples. Iron values from these two extractions were compared for samples from which the magnetite was removed, from which the magnetite was not removed, and from the magnetite fraction itself. In order to get the best possible estimation of relative age using free Fe concentrations, the ratio of magnetite-free oxalate to dithionite-extractable Fe should be used.

引用

页码：1022 / 1026

页数：5

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