Stable isotope techniques for assessing labile Cu in soils: Development of an L-value procedure, its application, and reconciliation with E values

文献类型： 外文期刊

第一作者： Oliver, IW

作者： Oliver, IW;Ma, YB;Lombi, E;Nolan, AL;McLaughlin, MJ

作者机构：

期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：9.028； 五年影响因子：9.922 ）

ISSN： 0013-936X

年卷期： 2006 年 40 卷 10 期

页码：

收录情况： SCI

摘要： Isotopic techniques have become a valuable tool for assessing the lability or potential availability of elements in soil. Until now, work on soil Cu has been limited to E-value methods where soil solution extracts are obtained by physical means due to the very short (12.4 h) half-life of the radio isotope Cu-64. However, a stable isotope method has recently been developed for determining soil Cu E values that utilizes enhancement of the Cu-65 isotope in soil and measurement of the subsequent ratio with Cu-63. We have developed an L-value technique for soil Cu, where plants are used to sample the soil solution and therefore give a direct measure of the plant available Cu. The L-value technique developed was then compared, and found to be equivalent, with E values using equilibration periods up to and including the growth period of plants in the L-value method.

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