Combining diffusive gradients in thin films (DGT) and spectroscopic techniques for the determination of phosphorus species in soils.
Combining diffusive gradients in thin films (DGT) and spectroscopic techniques for the determination of phosphorus species in soils.
复制标题
DOI：
10.1016/j.aca.2019.01.037
复制
发表时间：
2019-01
影响因子：
6.2
通讯作者：
C. Vogel;R. Sekine;Daniel Steckenmesser;E. Lombi;H. Herzel;L. Zuin;Dongniu Wang;R. Félix;C. Adam
中科院分区：
文献类型：
--
作者：
C. Vogel;R. Sekine;Daniel Steckenmesser;E. Lombi;H. Herzel;L. Zuin;Dongniu Wang;R. Félix;C. Adam
土壤磷素的植物有效性评价方法很多。已发表的研究表明，薄膜扩散梯度（DGT）技术具有上级相关性的植物有效磷在土壤中相比，标准的化学提取测试。为了识别植物有效的土壤磷形态，我们将DGT与红外和PK-和L2，3边X射线吸收近边结构（XANES）光谱相结合。这是通过光谱研究污垢展开后DGT器械的干燥粘合层来实现的。所有三种光谱方法都能够区分DGT结合层上不同种类的磷酸盐（聚磷酸盐、三偏磷酸盐、焦磷酸盐和正磷酸盐）。然而，红外光谱是最敏感的区分不同类型的吸附的无机和有机磷酸盐。此外，时间分辨水解的中间体的三偏磷酸盐在土壤中可以分析。
A wide range of methods are used to estimate the plant-availability of soil phosphorus (P). Published research has shown that the diffusive gradients in thin films (DGT) technique has a superior correlation to plant-available P in soils compared to standard chemical extraction tests. In order to identify the plant-available soil P species, we combined DGT with infrared and P K- and L2,3-edge X-ray adsorption near-edge structure (XANES) spectroscopy. This was achieved by spectroscopically investigating the dried binding layer of DGT devices after soil deployment. All three spectroscopic methods were able to distinguish between different kinds of phosphates (poly-, trimeta-, pyro- and orthophosphate) on the DGT binding layer. However, infrared spectroscopy was most sensitive to distinguish between different types of adsorbed inorganic and organic phosphates. Furthermore, intermediates of the time-resolved hydrolysis of trimetaphosphate in soil could be analyzed.