Determination of diffusion coefficients in agarose and polyacrylamide gels for 112 organic chemicals for passive sampling by organic Diffusive Gradients in Thin films (o-DGT)

2021 ◽  
Author(s):  
Bertille Bonnaud ◽  
Cécile Miège ◽  
Amandine Daval ◽  
Vincent Fauvelle ◽  
Nicolas Mazzella
Keyword(s):  
Thin Films ◽  
Diffusion Coefficients ◽  
Passive Sampling ◽  
Organic Chemicals ◽  
Polyacrylamide Gels ◽  
Diffusive Gradients

scholarly journals A new method based on diffusive gradients in thin films for in situ monitoring microcystin-LR in waters

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Lei Yao ◽  
Alan D. Steinman ◽  
Xiang Wan ◽  
Xiubo Shu ◽  
Liqiang Xie
Keyword(s):  
Thin Films ◽  
Passive Sampling ◽  
Sampling Method ◽  
Binding Capacity ◽  
Accurate Method ◽  
In Situ Monitoring ◽  
Active Sampling ◽  
Binding Agent ◽  
Diffusive Gradients

AbstractThe passive sampling method of diffusive gradients in thin-films (DGT) was developed to provide a quantitative and time-integrated measurement of microcystin-LR (MC-LR) in waters. The DGT method in this study used HLB (hydrophilic-lipophilic-balanced) material as a binding agent, and methanol as an eluent. The diffusion coefficient of MC-LR was 5.01 × 10−6 cm2 s−1 at 25 °C in 0.45 mm thick diffusion layer. This DGT method had a binding capacity of 4.24 μg per binding gel disk (3.14 cm2), ensuring sufficient capacity to measure MC-LR in most water matrices. The detection limit of HLB DGT was 0.48 ng L−1. DGT coupled to analysis by HPLC appears to be an accurate method for MC-LR monitoring. Comparison of DGT measurements for MC-LR in water and a conventional active sampling method showed little difference. This study demonstrates that HLB-based DGT is a useful tool for in situ monitoring of MC-LR in fresh waters.

Understanding and predicting the diffusivity of organic chemicals for diffusive gradients in thin-films using a QSPR model

2020 ◽  
Vol 706 ◽  
pp. 135691
Author(s):  
Sisi Liu ◽  
Lingmin Jin ◽  
Haiying Yu ◽  
Liang Lv ◽  
Chang-Er Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Organic Chemicals ◽  
Qspr Model ◽  
Diffusive Gradients

Determination of mercury in river water by diffusive gradients in thin films using P81 membrane as binding layer

Talanta ◽  
2014 ◽  
Vol 129 ◽  
pp. 417-421 ◽  
Author(s):  
Camila Destro Colaço ◽  
Lauren Nozomi Marques Yabuki ◽  
Ana Marta Rolisola ◽  
Amauri Antonio Menegário ◽  
Eduardo de Almeida ◽  
...  
Keyword(s):  
Thin Films ◽  
River Water ◽  
Diffusive Gradients

Determination of Mo(vi) in water with poly(quaternary ammonium salt) as a binding phase of diffusive gradients in thin-films

2015 ◽  
Vol 7 (24) ◽  
pp. 10251-10255 ◽  
Author(s):  
Hong Chen ◽  
Menghan Zhang ◽  
Han Zhang ◽  
Yu Zhang ◽  
Xu Liu ◽  
...  
Keyword(s):  
Thin Films ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Binding Agent ◽  
Binding Phase ◽  
Diffusive Gradients

A DGT device with poly(quaternary ammonium salt) as a binding agent was developed for the sampling and measurement of Mo(vi) in waters.

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