Scanning Electrochemical Microscopy: XXIX . In Situ Monitoring of Thickness Changes of Thin Films on Electrodes

1995 ◽  
Vol 142 (8) ◽  
pp. 2523-2527 ◽  
Author(s):  
Chang Wei ◽  
Allen J. Bard
Keyword(s):  
Thin Films ◽  
Scanning Electrochemical Microscopy ◽  
In Situ Monitoring ◽  
Electrochemical Microscopy

In Situ Observation of Interface Evolution on a Graphite Anode by Scanning Electrochemical Microscopy

2020 ◽  
Vol 12 (33) ◽  
pp. 37047-37053
Author(s):  
Xiaojie Zeng ◽  
Dongqing Liu ◽  
Shuwei Wang ◽  
Shuai Liu ◽  
Xingke Cai ◽  
...  
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Graphite Anode ◽  
In Situ Observation ◽  
Interface Evolution ◽  
Electrochemical Microscopy

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.

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