Evaluation and Application of the Diffusive Gradients in Thin Films Technique Using a Mixed-Binding Gel Layer for Measuring Inorganic Arsenic and Metals in Mining Impacted Water and Soil

2012 ◽  
Vol 84 (22) ◽  
pp. 9988-9995 ◽  
Author(s):  
Trang Huynh ◽  
Hao Zhang ◽  
Barry Noller
Keyword(s):  
Thin Films ◽  
Inorganic Arsenic ◽  
Gel Layer ◽  
Diffusive Gradients

scholarly journals In Situ Measurement of Thallium in Natural Waters by a Technique Based on Diffusive Gradients in Thin Films Containing a δ-MnO2 Gel Layer

2018 ◽  
Vol 91 (2) ◽  
pp. 1344-1352 ◽  
Author(s):  
Hongmei Deng ◽  
Mengting Luo ◽  
Xinyao Shi ◽  
Paul N. Williams ◽  
Kexin Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Natural Waters ◽  
In Situ Measurement ◽  
Gel Layer ◽  
Diffusive Gradients

Contribution of organic arsenic species to total arsenic measurements using ferrihydrite-backed diffusive gradients in thin films (DGT)

2012 ◽  
Vol 9 (1) ◽  
pp. 55 ◽  
Author(s):  
Heléne Österlund ◽  
Mikko Faarinen ◽  
Johan Ingri ◽  
Douglas C. Baxter
Keyword(s):  
Thin Films ◽  
Natural Waters ◽  
Arsenic Speciation ◽  
Inorganic Arsenic ◽  
Speciation Analysis ◽  
Arsenic Species ◽  
Future Studies ◽  
Organic Arsenic ◽  
Arsenic Determination ◽  
Diffusive Gradients

Environmental contextBoth the mobility and toxicity of arsenic in natural waters are related to the aqueous species distribution. Passive sampling using ferrihydrite-backed diffusive gradients in thin films (DGT) devices has in previous studies been characterised to measure labile inorganic arsenic, and the possible contribution of organic species has been disregarded. This study shows that the two most prevalent organic arsenic species might be included in DGT measurements, which should be taken into consideration when evaluating DGT data in future studies. AbstractIn previous publications discussing arsenic determination using ferrihydrite-backed diffusive gradients in thin films (DGT) devices, organic arsenic forms have been disregarded, even though it is known that the two most prevalent in natural waters, dimethylarsinate (DMA) and monomethylarsonate (MMA), may adsorb to ferrihydrite and thereby be included in the measurement. In this work the accumulation of DMA and MMA, as well as inorganic arsenite and arsenate, to ferrihydrite-backed DGT devices was investigated. It could be demonstrated that MMA, and under acidic conditions also DMA, adsorbed to the binding layer and might therefore contribute to the total mass of measured arsenic. Diffusion coefficients were measured for all four species to enable quantification of DGT-labile concentrations of organic and inorganic arsenic. Elution of the analytes from the ferrihydrite binding layer was performed using 1 mL of 1 M NaOH to facilitate arsenic speciation analysis using chromatographic separation. Average recovery rates were between 87 and 108 %. This study shows that the contribution of DMA and MMA to the total accumulated mass must be taken into consideration when evaluating DGT data in future studies.

Development and application of diffusive gradients in thin films for determining inorganic arsenic concentrations in natural waters

2006 ◽  
Vol 25 (S1) ◽  
pp. 206-206
Author(s):  
Jared G. Panther ◽  
Alison J. Downard ◽  
Kip J. Powell
Keyword(s):  
Thin Films ◽  
Natural Waters ◽  
Inorganic Arsenic ◽  
Diffusive Gradients

Development and application of the diffusive gradients in thin films technique for the measurement of total dissolved inorganic arsenic in waters

2008 ◽  
Vol 622 (1-2) ◽  
pp. 133-142 ◽  
Author(s):  
Jared G. Panther ◽  
Kathryn P. Stillwell ◽  
Kipton J. Powell ◽  
Alison J. Downard
Keyword(s):  
Thin Films ◽  
Inorganic Arsenic ◽  
Dissolved Inorganic Arsenic ◽  
Diffusive Gradients

Development of cerium oxide-based diffusive gradients in thin films technique for in-situ measurement of dissolved inorganic arsenic in waters

2019 ◽  
Vol 1052 ◽  
pp. 65-72 ◽  
Author(s):  
Feng Tan ◽  
Xiao Jiang ◽  
Xianliang Qiao ◽  
Daming Sun ◽  
Jinsuo Gao ◽  
...  
Keyword(s):  
Thin Films ◽  
Cerium Oxide ◽  
Inorganic Arsenic ◽  
In Situ Measurement ◽  
Dissolved Inorganic Arsenic ◽  
Diffusive Gradients

Perfluorosulfonated Ionomer-Modified Diffusive Gradients in Thin Films: Tool for Inorganic Arsenic Speciation Analysis

2008 ◽  
Vol 80 (24) ◽  
pp. 9806-9811 ◽  
Author(s):  
Jared G. Panther ◽  
Kathryn P. Stillwell ◽  
Kipton J. Powell ◽  
Alison J. Downard
Keyword(s):  
Thin Films ◽  
Arsenic Speciation ◽  
Inorganic Arsenic ◽  
Speciation Analysis ◽  
Perfluorosulfonated Ionomer ◽  
Diffusive Gradients

Improved Diffusive Gradients in Thin Films (DGT) Measurement of Total Dissolved Inorganic Arsenic in Waters and Soils Using a Hydrous Zirconium Oxide Binding Layer

2014 ◽  
Vol 86 (6) ◽  
pp. 3060-3067 ◽  
Author(s):  
Qin Sun ◽  
Jing Chen ◽  
Hao Zhang ◽  
Shiming Ding ◽  
Zhu Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Zirconium Oxide ◽  
Inorganic Arsenic ◽  
Hydrous Zirconium Oxide ◽  
Dissolved Inorganic Arsenic ◽  
Diffusive Gradients ◽  
Hydrous Zirconium

scholarly journals Speciation of Dissolved Inorganic Arsenic by Diffusive Gradients in Thin Films: Selective Binding of AsIIIby 3-Mercaptopropyl-Functionalized Silica Gel

2011 ◽  
Vol 83 (21) ◽  
pp. 8293-8299 ◽  
Author(s):  
William W. Bennett ◽  
Peter R. Teasdale ◽  
Jared G. Panther ◽  
David T. Welsh ◽  
Dianne F. Jolley
Keyword(s):  
Thin Films ◽  
Silica Gel ◽  
Inorganic Arsenic ◽  
Functionalized Silica ◽  
Selective Binding ◽  
Dissolved Inorganic Arsenic ◽  
Diffusive Gradients
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