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Novel diffusive gradients in thin films technique to assess labile sulfate in soil
VerfasserHanousek, Ondrej ; Mason, Sean ; Santner, Jakob ; Chowdhury, Md Mobaroqul Ahsan ; Berger, Torsten W. ; Prohaska, Thomas
Erschienen in
Analytical and Bioanalytical Chemistry, Berlin, 2016, Jg. 408, H. 24, S. 6759-6767
ErschienenSpringer, 2016
SpracheEnglisch
DokumenttypAufsatz in einer Zeitschrift
Schlagwörter (EN)Diffusive gradients in thin films (DGT) / ICP-MS / Sulfur / Sulfate / Soil
ISSN1618-2650
URNurn:nbn:at:at-ubbw:3-1407 Persistent Identifier (URN)
DOI10.1007/s00216-016-9801-8 
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Novel diffusive gradients in thin films technique to assess labile sulfate in soil [0.64 mb]
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Zusammenfassung (Englisch)

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 9.831060.3510-6 cm2 s1 at 25 C. The accumulated sulfate was eluted in 1 mol L1 HNO3 with a recovery of 90.91.6 %. 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.

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