Passive sampling of anionic pesticides using the Diffusive Gradients in Thin films technique (DGT)

2017 ◽  
Vol 966 ◽  
pp. 1-10 ◽  
Author(s):  
Robin Guibal ◽  
Rémy Buzier ◽  
Adeline Charriau ◽  
Sophie Lissalde ◽  
Gilles Guibaud
Keyword(s):  
Thin Films ◽  
Passive Sampling ◽  
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.

scholarly journals Monitoring of Heavy Metal Pollution in Water and Sediments at the Mid-Black Sea Region by Using Passive Sampling Method Diffusive Gradients in Thin Films

2021 ◽  
Vol 9 (6) ◽  
pp. 1076-1086
Author(s):  
Arife Şimşek ◽  
Şule Sancak ◽  
Gülfem Bakan
Keyword(s):  
Thin Films ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Black Sea ◽  
Passive Sampling ◽  
Sampling Method ◽  
Grab Sampling ◽  
Metal Concentrations ◽  
Water And Sediment ◽  
Diffusive Gradients

Determining the potential bioavailability of heavy metals, evaluating according to adapted regulations is essential to efficiently conserve our coastal and estuarine waters. In this study, it is aimed to determine the industrial pollution and various other pollution sources that the Black Sea Basin is exposed to by using DGT (Diffusive Gradients in Thin Films) method and grab (manuel) sampling method in water and sediment and to evaluate the existing pollution according to quality standards. In Samsun, seasonal samples were collected from five different sampling stations, namely Akkiraz Stream, Hıdırellez Stream, Organized Industrial Zone (OIZ) Channel, Şabanoğlu Stream and Selyeri Stream, which are selected from Tekkeköy region where industry is intensively active. In order to determine the heavy metal content in both water and sediment samples, the DGT method was chosen for passive sampling and the grab sampling method was used for active sampling, and the efficiency of the methods was evaluated. According to the results of the study, the heavy metal concentration in grab sampling for water samples in descending order Al> Fe> Zn> Pb> Ni> Cu; In the samples taken with DGT, they are listed as Al> Fe> Zn> Cu> Ni> Pb. There were significant relationships between the total metal concentrations of sediment (Csed) and water (Csu) in grab sampling and metal concentrations sediment (Csed-DGT) and water (Csu-DGT) measured by DGT. It was found that the sensitivity and performance of sampling with DGT was 2-10 times higher compared to grab sampling. The high resolution in situ DGT technique for the assessment and management of the potential release risk of heavy metals at the water-sediment interface is a complementary method that contributes to the standard grab sampling method.

Effect of Biofilm on Passive Sampling of Dissolved Orthophosphate Using the Diffusive Gradients in Thin Films Technique

2016 ◽  
Vol 88 (13) ◽  
pp. 6836-6843 ◽  
Author(s):  
Zhongmin Feng ◽  
Peng Zhu ◽  
Hongtao Fan ◽  
Shanshan Piao ◽  
Liang Xu ◽  
...  
Keyword(s):  
Thin Films ◽  
Passive Sampling ◽  
Diffusive Gradients

Localised mobilisation of metals, as measured by diffusive gradients in thin-films, in soil historically treated with sewage sludge

Chemosphere ◽  
2013 ◽  
Vol 90 (2) ◽  
pp. 464-470 ◽  
Author(s):  
Jun Luo ◽  
Hao Zhang ◽  
William Davison ◽  
Ronald G. McLaren ◽  
Lynne M. Clucas ◽  
...  
Keyword(s):  
Thin Films ◽  
Sewage Sludge ◽  
Diffusive Gradients
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