Evaluation of the diffusive gradients in thin films technique using a mixed binding gel for measuring iron, phosphorus and arsenic in the environment

2015 ◽  
Vol 17 (3) ◽  
pp. 570-577 ◽  
Author(s):  
Qin Sun ◽  
Liping Zhang ◽  
Shiming Ding ◽  
Chao Li ◽  
Jinyan Yang ◽  
...  
Keyword(s):  
Thin Films ◽  
Zirconium Oxide ◽  
Dissolved Iron ◽  
Chelex 100 ◽  
Simultaneous Measurements ◽  
Diffusive Gradients

Simultaneous measurements of dissolved iron (Fe), phosphorus (P), and arsenic (As) were made using the diffusive gradients in thin films technique equipped with a mixed binding gel impregnated with zirconium oxide and Chelex-100 (ZrO–Chelex DGT).

Simultaneous measurements of cations and anions using diffusive gradients in thin films with a ZrO-Chelex mixed binding layer

2017 ◽  
Vol 972 ◽  
pp. 1-11 ◽  
Author(s):  
Yan Wang ◽  
Shiming Ding ◽  
Lei Shi ◽  
Mengdan Gong ◽  
Shiwei Xu ◽  
...  
Keyword(s):  
Thin Films ◽  
Simultaneous Measurements ◽  
Diffusive Gradients

Simultaneous measurements of arsenic and sulfide using diffusive gradients in thin films technique (DGT)

2017 ◽  
Vol 40 (5) ◽  
pp. 1919-1929 ◽  
Author(s):  
Lv Xu ◽  
Qin Sun ◽  
Shiming Ding ◽  
Mengdan Gong ◽  
Chaosheng Zhang
Keyword(s):  
Thin Films ◽  
Simultaneous Measurements ◽  
Diffusive Gradients

scholarly journals Characterization of sorption gels used for determination of mercury in aquatic environment by diffusive gradients in thin films technique

2010 ◽  
Vol 8 (5) ◽  
pp. 1105-1109 ◽  
Author(s):  
Pavel Diviš ◽  
Roman Szkandera ◽  
Hana Dočekalová
Keyword(s):  
Thin Films ◽  
Standard Deviation ◽  
Ionic Strength ◽  
Aquatic Environment ◽  
Chelex 100 ◽  
Natural Ligands ◽  
Diffusive Gradients ◽  
Influence Of Ph

AbstractThe influence of pH, ionic strength and selected natural ligands on the measurement of mercury by the diffusive gradients in thin films technique (DGT) using recently introduced sorption gels was determined. Sorption gels containing Chelex 100, Spheron-Thiol, Duolite GT73 and modified Iontosorb AV resins were investigated, with the sorption capacity determined for all used sorption gels. The minimum DGT measurable concentrations were calculated from 3 times the standard deviation of mercury amount in unexposed sorption gels.

scholarly journals Speciation of Inorganic Compounds in Aquatic Systems Using Diffusive Gradients in Thin-Films: A Review

2021 ◽  
Vol 9 ◽  
Author(s):  
Josep Galceran ◽  
Yue Gao ◽  
Jaume Puy ◽  
Martine Leermakers ◽  
Carlos Rey-Castro ◽  
...  
Keyword(s):  
Thin Films ◽  
Trace Metals ◽  
Inorganic Compounds ◽  
Diffusion Flux ◽  
Aquatic System ◽  
Chelex 100 ◽  
Free Ions ◽  
Inorganic Complexes ◽  
Diffusive Gradients

The speciation of trace metals in an aquatic system involves the determination of free ions, complexes (labile and non-labile), colloids, and the total dissolved concentration. In this paper, we review the integrated assessment of free ions and labile metal complexes using Diffusive Gradients in Thin-films (DGT), a dynamic speciation technique. The device consists of a diffusive hydrogel layer made of polyacrylamide, backed by a layer of resin (usually Chelex-100) for all trace metals except for Hg. The best results for Hg speciation are obtained with agarose as hydrogel and a thiol-based resin. The diffusive domain controls the diffusion flux of the metal ions and complexes to the resin, which strongly binds all free ions. By using DGT devices with different thicknesses of the diffusive or resin gels and exploiting expressions derived from kinetic models, one can determine the labile concentrations, mobilities, and labilities of different species of an element in an aquatic system. This procedure has been applied to the determination of the organic pool of trace metals in freshwaters or to the characterization of organic and inorganic complexes in sea waters. The concentrations that are obtained represent time-weighted averages (TWA) over the deployment period.

Simultaneous measurements of As, Mo, Sb, V and W using a ferrihydrite diffusive gradients in thin films (DGT) device

2010 ◽  
Vol 682 (1-2) ◽  
pp. 59-65 ◽  
Author(s):  
Heléne Österlund ◽  
Sara Chlot ◽  
Mikko Faarinen ◽  
Anders Widerlund ◽  
Ilia Rodushkin ◽  
...  
Keyword(s):  
Thin Films ◽  
Simultaneous Measurements ◽  
Diffusive Gradients
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