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标题：Low-level soluble chloride extraction in soil
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作者：Daniel Larsen ; Brian Waldron
期刊名称：MethodsX
印刷版ISSN：2215-0161
电子版ISSN：2215-0161
出版年度：2020
卷号：7
页码：1-7
DOI：10.1016/j.mex.2020.100967
语种：English
出版社：Elsevier
摘要：AbstractThree methods of extraction of low-level soluble chloride contents from vadose-zone soil were evaluated in this study. Three methods were employed on a silty sand soil using a 2:1 fluid:soil ratio: 1) Method A utilized three successive rinses with deionized water; 2) Method B applied three successive rinses of 0.0001 M and 0.001 M Na2SO4solution; and 3) Method C passed deionized water through the soil with a pressurized filtration system three times. Method A had lower standard deviation and yielded more consistent soluble chloride contents per rinse than method C; Method B was ruled out because of concerns that the Na2SO4reagent contained trace amounts of chloride. Method A was applied with a 1:1 fluid:soil ratio in duplicate to 50 samples from a 34-m thick vadose-zone borehole, yielding a mean difference in duplicates of 13.9% and percent total extracted soluble chloride of 62.4 ± 9.9%, 25.2 ± 7.4%, and 12.4 ± 6.6% in each of the three successive rinses.•Three successive rinses of soil with deionized water achieved consistent extraction results.•Multiple rinses are necessary to extract soluble chloride if chloride contents are low.•This method is amenable to analysis of soil in vadose-zone borehole samples.Graphical abstractDisplay Omitted
关键词：Recharge;Rinses;Fluid:soil ratio