结合薄膜扩散梯度(DGT)和31P NMR光谱测定土壤中的磷物种

IF 2.3 4区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Agricultural & Environmental Letters Pub Date : 2022-03-31 DOI:10.1002/ael2.20068
Christian Vogel, Ashlea Doolette, Jianyin Huang
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引用次数: 0

摘要

薄膜扩散梯度(DGT)技术在许多出版物中显示出与土壤中植物有效磷(P)含量的良好相关性。然而,这项技术无法提供土壤中植物有效磷物种的信息。因此,我们将DGT与溶液31P核磁共振(NMR)光谱相结合。这是通过使用改进的DGT装置来实现的,其中扩散层具有更大的孔径,结合层结合了具有更高容量的吸附材料,并且该装置具有较大的暴露面积。光谱研究是在将部署的DGT结合层在NaOH溶液中洗脱后进行的。使用已知有机P化合物溶液的吸附测试表明,足够量的这些化合物可以吸附在结合层上,以便通过溶液31P NMR光谱对它们进行分析。此外,随着时间的推移,还可以分析土壤中三聚磷酸水解的各种中间体。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Combining diffusive gradients in thin-films (DGT) and 31P NMR spectroscopy to determine phosphorus species in soil

The diffusive gradients in thin-films (DGT) technique shows in many publications a superior correlation to the amount of plant-available phosphorus (P) in soil. However, this technique cannot give information on the plant-available P species in soil. Therefore, we combined DGT with solution 31P nuclear magnetic resonance (NMR) spectroscopy. This was achieved by using a modified DGT device in which the diffusive layer had a larger pore size, the binding layer incorporated an adsorption material with a higher capacity, and the device had a larger exposure area. The spectroscopic investigation was undertaken after elution of the deployed DGT binding layer in a NaOH solution. Adsorption tests using solutions of known organic P compounds showed that a sufficient amount of these compounds could be adsorbed on the binding layer in order for them to be analyzed by solution 31P NMR spectroscopy. Furthermore, various intermediates of the hydrolysis of trimetaphosphate in soil could be also analyzed over time.

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来源期刊
CiteScore
3.70
自引率
3.80%
发文量
28
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