Sampling of Phenol in Water by Diffusive Gradients Using Thin Film Technique

2014 ◽  
Vol 43 (7) ◽  
pp. 1164-1166 ◽  
Author(s):  
Jia Dong ◽  
Liangchen Li ◽  
Zhiwen Jiang ◽  
Gang Zhang ◽  
Ting Sun
Keyword(s):  
Thin Film ◽  
Thin Film Technique ◽  
Diffusive Gradients

Determination of Chromium Speciation in Tap Water Using Diffusive Gradients in Thin Film Technique

2014 ◽  
Vol 43 (6) ◽  
pp. 849-850 ◽  
Author(s):  
Lianwen Guo ◽  
Hong Chen ◽  
Yangyang Zhang ◽  
Le Bo ◽  
Jianrong Li
Keyword(s):  
Thin Film ◽  
Tap Water ◽  
Chromium Speciation ◽  
Thin Film Technique ◽  
Diffusive Gradients

Development and evaluation of a diffusive gradients in a thin film technique for measuring ammonium in freshwaters

2016 ◽  
Vol 904 ◽  
pp. 83-91 ◽  
Author(s):  
Jianyin Huang ◽  
William W. Bennett ◽  
David T. Welsh ◽  
Tianling Li ◽  
Peter R. Teasdale
Keyword(s):  
Thin Film ◽  
Thin Film Technique ◽  
Diffusive Gradients

In situ measurement of synthetic musks in wastewaters using diffusive gradients in thin film technique

2020 ◽  
Vol 185 ◽  
pp. 116239
Author(s):  
Suyu Ren ◽  
Feng Tan ◽  
Yan Wang ◽  
Hongxia Zhao ◽  
Yiwen Zhang ◽  
...  
Keyword(s):  
Thin Film ◽  
In Situ Measurement ◽  
Synthetic Musks ◽  
Thin Film Technique ◽  
Diffusive Gradients

Sampling of dissolved inorganic SbIII by mercapto-functionalized silica-based diffusive gradients in thin-film technique

RSC Advances ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 2624-2631 ◽  
Author(s):  
Hong-Tao Fan ◽  
Ai-Juan Liu ◽  
Bing Jiang ◽  
Qing-Jie Wang ◽  
Tong Li ◽  
...  
Keyword(s):  
Thin Film ◽  
Functionalized Silica ◽  
Thin Film Technique ◽  
First Time ◽  
Diffusive Gradients

The mercapto-functionalized silica (MPS) diffusive gradients in thin-film (DGT) devices, for the first time, were characterized by the determination of dissolved inorganic SbIII.

New Diffusive Gradients in a Thin Film Technique for Measuring Inorganic Arsenic and Selenium(IV) Using a Titanium Dioxide Based Adsorbent

2010 ◽  
Vol 82 (17) ◽  
pp. 7401-7407 ◽  
Author(s):  
William W. Bennett ◽  
Peter R. Teasdale ◽  
Jared G. Panther ◽  
David T. Welsh ◽  
Dianne F. Jolley
Keyword(s):  
Thin Film ◽  
Titanium Dioxide ◽  
Inorganic Arsenic ◽  
Thin Film Technique ◽  
Diffusive Gradients

scholarly journals A Novel Thin-Film Technique to Improve Accuracy of Fluorescence-Based Estimates for Periphytic Biofilms

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1464
Author(s):  
Leon Katona ◽  
Yvonne Vadeboncoeur ◽  
Christopher T. Nietch ◽  
Katie Hossler
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Light Attenuation ◽  
Pulse Amplitude ◽  
Light Signal ◽  
Photosynthetic Parameters ◽  
Pam Fluorometry ◽  
Attenuation Coefficients ◽  
Thin Film Technique ◽  
Relative Errors

Recent studies suggest that photophysiological parameters for intact substrates with depth (e.g., periphytic biofilms, microphytobenthos) are overestimated by pulse-amplitude modulated (PAM) fluorometry. This overestimation results from depth-integration effects, following the activation of deeper photosynthesizing layers by an attenuated light signal. To mitigate this error, we propose a novel slide-based thin-film technique in which fluorescence is measured on a vertically representative subsample of the biofilm, spread evenly on a microscope slide. We compared bias and precision for photosynthetic parameters estimated through conventional PAM fluorometry on intact biofilms and through our novel slide-based technique, both theoretically and empirically. Numerical simulations confirmed the consistent overestimation of key parameters for intact biofilms, with relative errors up to 145%, compared to, at most, 52% on thin films. Paired empirical observations likewise demonstrated that estimates based on intact biofilms were consistently higher (up to 248%, p<0.001) than estimates from thin films. Numerical simulation suggested greater precision with the slide-based technique for homogeneous biofilms, but potentially less precision for heterogeneous biofilms with improper subsampling. Our empirical comparison, however, demonstrated some improvement in precision with the slide-based technique (e.g., the coefficient of variation for the maximum electron transport rate was reduced 30%, p=0.009). We recommend the use of the slide-based technique, particularly for biofilms that are thick or have small light attenuation coefficients. Care should be taken, however, to obtain vertically representative subsamples of the biofilm for measurement.

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