Knowledge of the fractionation of mercury in soils in the vicinity of abandoned cinnabar mines is essential for assessing the usability of soils for the cultivation of agriculturally important crops. Two different sequential extraction methods and the technique of diffusive gradients in thin films (DGT) were applied and compared for fractionation of mercury in soils from mercury‐contaminated sites intended for farming purposes. The mercury found in these soils was primarily in the form of mercury sulfide (58.6–83.9%), followed by 6.7 to 15.4% of organically bound mercury and 2.9 to 23.2% of elemental mercury. Up to 10.3% of labile mercury species were determined by both sequential extraction methods in these soils. However, only 0.01 to 0.13% of mercury was determined as a bioavailable fraction using the DGT technique. Both sequential extraction methods tested for the fractionation analysis of mercury in contaminated soils were in excellent agreement. The content of the mobile (labile) mercury determined by the sequential extraction methods was statistically significantly higher (p < 0.0001) than the content of bioavailable mercury determined by the DGT technique. Environ Toxicol Chem 2020;39:1670–1677. © 2020 SETAC

中文翻译：

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土壤中汞的组分分析：三种生物可利用的汞组分测定技术的比较。

了解废弃朱砂矿附近土壤中汞的分馏知识对于评估土壤在农业上重要作物的种植中的可用性至关重要。应用了两种不同的顺序提取方法和薄膜中的扩散梯度技术（DGT），并比较了用于农业目的的汞污染土壤中汞的分馏情况。这些土壤中发现的汞主要为硫化汞形式（58.6–83.9％），其次是有机结合汞的6.7％至15.4％和元素汞的2.9％至23.2％。在这两种土壤中，通过两种顺序萃取方法确定了高达10.3％的不稳定汞物种。但是，使用DGT技术只能测定出0.01％至0.13％的汞作为可生物利用的部分。两种用于污染土壤中汞分馏分析的顺序萃取方法都非常吻合。通过顺序萃取方法确定的活动（不稳定）汞含量在统计学上显着更高（p  <0.0001）比通过DGT技术测定的生物可利用汞含量高。2020年《环境毒理学》； 39：1670–1677。©2020 SETAC