Donnan Membrane Technique (DMT) for Anion Measurement

2010 ◽  
Vol 82 (7) ◽  
pp. 2932-2939 ◽  
Author(s):  
Flora Alonso Vega ◽  
Liping Weng ◽  
Erwin J. M. Temminghoff ◽  
Willem H. Van Riemsdijk
Keyword(s):  
Membrane Technique ◽  
Donnan Membrane Technique

scholarly journals Free Eu(III) Determination by Donnan Membrane Technique with Electrochemical Detection: Implementation and Evaluation

2021 ◽  
Author(s):  
Noémie Janot ◽  
Jan E. Groenenberg ◽  
Alba Otero-Fariña ◽  
José Paulo Pinheiro
Keyword(s):  
Cation Exchange ◽  
Natural Waters ◽  
Stripping Voltammetry ◽  
Cation Exchange Membrane ◽  
Membrane Technique ◽  
Ligand Free ◽  
Natural Solution ◽  
Pass Through ◽  
Donnan Membrane Technique ◽  
Exchange Membrane

AbstractThe aim of this study was to develop an analytical method to determine free concentrations of Europium (Eu(III)) in natural waters. Europium(III) in solution was detected using cathodic stripping voltammetry after complexation with N-nitroso-N-phenylhydroxylamine (cupferron). Optimization of analytical parameters allowed us to detect nanomolar levels of Eu(III) in solution. Free Eu(III) in solution was measured using the Donnan membrane technique in which a natural solution (the “donor”, containing various ligands) is separated from a ligand-free solution (the “acceptor”) by a cation-exchange membrane. This membrane allows only non-colloidal cationic species to pass through it, and after an adequate time equilibrium is reached between both compartments. Total Eu(III) concentration can then be quantified in the acceptor solution and related to free Eu(III) in the natural sample. Due to its high valency, free Eu(III) tends to adsorb strongly to the cation-exchange membrane. In order to determine the physicochemical conditions minimizing this adsorption, we analyzed solutions of different Eu(III) and Ca(II) (as background ion) concentrations. Results showed that 100 mM of Ca(II) were necessary to make adsorption of Eu(III) onto the membrane negligible. The optimized setup was then used to quantify Eu(III) complexation in a Eu(III)-dissolved organic matter solution.

Determination of the chemical speciation of trace metals in aqueous systems by the Wageningen Donnan Membrane Technique

2000 ◽  
Vol 417 (2) ◽  
pp. 149-157 ◽  
Author(s):  
Erwin J.M. Temminghoff ◽  
Alexandra C.C. Plette ◽  
Rein Van Eck ◽  
Willem H. Van Riemsdijk
Keyword(s):  
Trace Metals ◽  
Chemical Speciation ◽  
Aqueous Systems ◽  
Membrane Technique ◽  
Donnan Membrane Technique

Measuring Free Metal Ion Concentrations in Situ in Natural Waters Using the Donnan Membrane Technique

2006 ◽  
Vol 40 (3) ◽  
pp. 955-961 ◽  
Author(s):  
Erwin J. J. Kalis ◽  
Weng ◽  
Freerk Dousma ◽  
Erwin J. M. Temminghoff ◽  
Willem H. Van Riemsdijk
Keyword(s):  
Metal Ion ◽  
Natural Waters ◽  
Ion Concentrations ◽  
Membrane Technique ◽  
Donnan Membrane Technique ◽  
Free Metal ◽  
Free Metal Ion

scholarly journals Speciation of Zn, Fe, Ca and Mg in wine with the Donnan Membrane Technique

2018 ◽  
Vol 239 ◽  
pp. 1143-1150 ◽  
Author(s):  
Mireia Lao ◽  
Encarnació Companys ◽  
Liping Weng ◽  
Jaume Puy ◽  
Josep Galceran
Keyword(s):  
Membrane Technique ◽  
Donnan Membrane Technique

Strategies in the application of the Donnan membrane technique

2011 ◽  
Vol 8 (5) ◽  
pp. 466 ◽  
Author(s):  
Liping Weng ◽  
Flora Alonso Vega ◽  
Willem H. Van Riemsdijk
Keyword(s):  
Ion Concentration ◽  
Accumulation Factor ◽  
Analytical Technique ◽  
Ion Concentrations ◽  
Icp Ms ◽  
Membrane Technique ◽  
Free Ion ◽  
Cell Measurement ◽  
Donnan Membrane Technique ◽  
Measurement Strategies

Environmental context Free ion concentrations determine the effects of nutrients and pollutants on organisms in the environment. The Donnan membrane technique provides a measure of free ion concentrations. This paper presents clear guidelines on the application of the Donnan membrane technique for determining free ion concentrations in both synthetic and natural samples. Abstract The Donnan membrane technique (DMT) can be applied to measure free ion concentrations both in laboratory and in situ in the field. In designing DMT experiments, different strategies can be taken, depending on whether accumulation is needed. (1) When the free ion concentration is above the detection limit of the analytical technique (e.g. ICP-MS), no accumulation is needed and no ligand is added to the acceptor. Measurement can be based on the Donnan membrane equilibrium. (2) When an accumulation of less than 500 times is needed, an appropriate amount of ligand can be added to the acceptor and measurement can be based on the Donnan membrane equilibrium. (3) When an accumulation factor of larger than 500 times is needed, a relatively large amount of ligand is added to the acceptor and measurement can be based on the transport kinetics. In this paper, several issues in designing the DMT experiments are discussed: choice of DMT cell, measurement strategies and ligands and possible implication of slow dissociation of metal complexes in the sample solution (lability issue). The objective of this paper is to give better guidance in the application of DMT for measuring free ion concentrations in both synthetic and natural samples.

In-situ measurement of free trace metal concentrations in a flooded paddy soil using the Donnan Membrane Technique

Geoderma ◽  
2015 ◽  
Vol 241-242 ◽  
pp. 59-67 ◽  
Author(s):  
Yunyu Pan ◽  
Gerwin F. Koopmans ◽  
Luc T.C. Bonten ◽  
Jing Song ◽  
Yongming Luo ◽  
...  
Keyword(s):  
Trace Metal ◽  
Paddy Soil ◽  
In Situ Measurement ◽  
Metal Concentrations ◽  
Membrane Technique ◽  
Flooded Paddy Soil ◽  
Donnan Membrane Technique
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