Novel diffusive gradients in thin films technique to assess labile sulfate in soil
详细信息 查看全文
- 作者：Ondrej Hanousek ; Sean Mason ; Jakob Santner…
- 关键词：Diffusive gradients in thin films (DGT) ; ICP ; MS ; Sulfur ; Sulfate ; Soil
- 刊名：Analytical and Bioanalytical Chemistry
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：408
- 期：24
- 页码：6759-6767
- 全文大小：661 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Analytical Chemistry
Food Science
Inorganic Chemistry
Physical Chemistry
Monitoring, Environmental Analysis and Environmental Ecotoxicology - 出版者：Springer Berlin / Heidelberg
- ISSN：1618-2650
- 卷排序：408
文摘
A novel diffusive gradients in thin films (DGT) technique for sampling labile soil sulfate was developed, based on a strong basic anion exchange resin (Amberlite IRA-400) for sulfate immobilization on the binding gel. For reducing the sulfate background on the resin gels, photopolymerization was applied instead of ammonium persulfate-induced polymerization. Agarose cross-linked polyacrylamide (APA) hydrogels were used as diffusive layer. The sulfate diffusion coefficient in APA gel was determined as 9.83 × 10−6 ± 0.35 × 10-6 cm2 s−1 at 25 °C. The accumulated sulfate was eluted in 1 mol L−1 HNO3 with a recovery of 90.9 ± 1.6 %. The developed method was tested against two standard extraction methods for soil sulfate measurement. The obtained low correlation coefficients indicate that DGT and conventional soil test methods assess differential soil sulfate pools, rendering DGT a potentially important tool for measuring labile soil sulfate.