Environmental Science and Pollution Research

, Volume 26, Issue 2, pp 1994–2006 | Cite as

Better understanding and applications of ammonium 12-molybdophosphate-based diffusive gradient in thin film techniques for measuring Cs in waters

  • Josselin GornyEmail author
  • Alkiviadis Gourgiotis
  • Fréderic Coppin
  • Laureline Février
  • Hao Zhang
  • Caroline Simonucci
Research Article


This study deals with further and systematic laboratory evaluation of the already known ammonium 12-molybdophosphate (AMP)-diffusive gradient in thin film (DGT) method, which is used for measuring total Cs concentration in environmental waters. This study confirms that the AMP-binding gel is not stable for pH > 6. In order to reveal a potential impact of AMP degradation on DGT application, time-series experiments were performed by deploying AMP-DGT samplers in Cs-doped moderately basic soft and hard water up to total AMP-binding gel degradation (60 and 175 h of deployment time, respectively). Linear accumulation of Cs by AMP-DGT samplers was observed up to 48 and 58 h in hard and soft waters, respectively. For this deployment time range, AMP-DGT measured over 77 ± 10 and 94 ± 16% of total Cs concentration in hard and soft water, respectively. The difference in DGT response was attributed to Ca2+ and Mg2+ competition reducing the uptake of AMP-DGT samplers in hard water. Shrinkage of agarose-polyacrylamide diffusive gel was experimentally observed only in hard water due to more intensive AMP-binding gel degradation in hard water. Even if the AMP-DGT response was not impacted in this study, it is recommended to use agarose hydrogel as standard diffusive gel. Based on the experience obtained from this detailed validation process, the authors propose a number of key requirements that need to be considered when developing DGT devices, with testing the performance over longer deployment times being critical.

Graphical abstract


Cesium Diffusive gradient in thin film (DGT) technique Binding gel stability Time-series accumulation Laboratory validation AMP degradation 



Dr. Charlotte Cazala is gratefully acknowledged for her reading of the paper. Dr. Valérie Buard is also gratefully thanked for her help on the thickness measurement of diffusive gel with the optical microscope of laboratory LRMed (IRSN). This is PATERSON contribution 3.

Funding information

This work has been supported by the ANR (French National Research Agency), under the “Investissement d’Avenir” framework program (number ANR-11-RSNR-0002).

Supplementary material

11356_2018_3719_MOESM1_ESM.docx (79 kb)
ESM 1 (DOCX 79 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.PSE-ENV, SEDRE, LELIInstitut de Radioprotection et de Sûreté Nucléaire (IRSN)Fontenay-aux-RosesFrance
  2. 2.PSE-ENV, SRTE, LR2TInstitut de Radioprotection et de Sûreté Nucléaire (IRSN)CadaracheFrance
  3. 3.Lancaster Environment CentreLancaster UniversityLancasterUK
  4. 4.PSE-ENV, SIRSE, LER-NORDInstitut de Radioprotection et de Sûreté Nucléaire (IRSN)Fontenay-aux-RosesFrance

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