INTEGRATED IN SITU CHEMICAL MAPPING PROBES

Informazioni relative al progetto

SCHEMA

ID dell’accordo di sovvenzione: 614002

Progetto chiuso

Data di avvio 1 Ottobre 2013

Data di completamento 30 Settembre 2017

Finanziato da

• Specific Programme "Cooperation": Environment (including Climate Change)

Costo totale € 6 741 554,30

Contributo UE € 5 200 489,00

Coordinato da

UNIVERSITE DE GENEVE
Switzerland

Exploitable results

Exploitable results – Microelectrode capable of quantifying Arsenic(III) in fresh water samples.

Result description

Arsenic (III) detection in freshwater samples was successfully demonstrated using a gold plated Ir-based microelectrode (Au-IrM). The key advantage of this approach is the ability to renew the Au layer by electrochemical control for better robustness in the field.

Result type

* product

Link to result

http://dx.doi.org/10.1039/c5an00151j

References

Touilloux, R., Tercier-Waeber, M.-L. and E. Bakker (2015) Direct arsenic(III) sensing by a renewable gold plated Ir-based microelectrode. Analyst, 140, 3526-3534.

Exploitable results – Exhaustive thin layer cyclic voltammetry for absolute multianalyte halide detection

Result description

Demonstration of the use of thin-layer samples controlled by cyclic voltammetry to analyze water samples for chloride, bromide, and iodide.+E166.

Result type

* exploitable scientific result

Link to result

http://dx.doi.org/10.1021/ac503344f

References

Cuartero, M., Crespo, G., A., Ghahraman Afshar, M. and E. Bakker (2014) Exhaustive Thin-Layer Cyclic Voltammetry for Absolute Multianalyte Halide Detection. Anal. Chem., 86(22), 11387–11395.

Exploitable results – Counter electrode based on an ion-exchanger Donnan exclusion membrane for bioelectroanalysis

Result description

Ion-exchanger based Donnan exclusion membranes (IEDEM) were studied here as separators for counter and pseudo-reference electrodes in bioelectroanalysis. The results suggest that such membranes may be used in bioelectrochemical sensing approaches to replace expensive but less appropriate electrode materials for the measurement in matrices that contain lipids and proteins.

Result type

* product

Link to result

http://dx.doi.org/10.1016/j.bios.2014.04.039

References

Ghahraman Afshar, M., Crespon, G. A. and E. Bakker (2014) Counter electrode based on an ion-exchanger Donnan exclusion membrane for bioelectroanalysis. Biosens Bioelectron., 5(61), 64-69.

Exploitable results – Direct alalinity detection with ion-selective chronopotentiometry

Result description

Directly measure pH and alkalinity in a sample with the same sensor by imposing an outward flux of hydrogen ions from an ion-selective membrane to the sample solution by an applied current.

Result type

* exploitable scientific result

Link to result

http://dx.doi.org/10.1021/ac500968c

References

Ghahraman Afshar, M., Crespo, G. A., Xie, X. and E. Bakker (2014) Direct Alkalinity Detection with Ion-Selective Chronopotentiometry. Anal. Chem., 86(13), 6461–6470.

Exploitable results – Paper-Based Thin Layer Coulometric Sensors for Halide Detection

Result description

Paper-based analytical device (PAD) for the exhaustive, and therefore absolute, determination of halides in a range of diverse water samples and food supplements.

Result type

* product

Link to result

http://dx.doi.org/10.1021/ac504400w

References

Cuartero, M., Crespo, G. A. and E. Bakker (2015) Paper-Based Thin-Layer Coulometric Sensor for Halide Determination. Anal. Chem., 87(3), 1981–1990.

Exploitable results – Thin Layer Coulometry of Nitrite with Ion-Selective Membranes

Result description

A thin layer coulometric detection method based on an ion-selective membrane in view of a quantitative determination of nitrite in undiluted human urine and tap water. A cobalt(II) tert-butyl salophen compound is used as ionophore. The four orders of magnitude discrimination of chloride permits the detection of nitrite in samples that contain a large excess of chloride. The approach developed here allows one to determine nitrite within a concentration range of 20–100?µM for a 120?s current integration time.

Result type

* exploitable scientific result

Link to result

http://dx.doi.org/10.1002/elan.201400522

References

Ghahraman Afshar, M. G., Crespo, G. A., Darokhin, D., Neel, B. and E. Bakker (2015) Thin Layer Coulometry of Nitrite with Ion-Selective Membranes. Electroanalysis, 27(3), 609-615.

Exploitable results – Custom made galvanostat/potentiostat and high impedance potentiometer for decentralized measurements of ionophore-based electrodes

Result description

A portable, custom-made instrument for decentralized measurements with ionophore based electrodes. It allows one to perform most common electrochemical protocols based on applied current or potential as well as zero current potentiometry measurements.

Result type

* product

Link to result

http://dx.doi.org/10.1016/j.snb.2014.10.084

References

Jeanneret Grosjean, S., Crespo, G. A., Ghahraman Afshar, M. and E. Bakker (2015) GalvaPot, a custom-made combination galvanostat/potentiostat and high impedance potentiometer for decentralized measurements of ionophore-based electrodes. Sensors and Actuators. B. Chemical, 207, 631-639.

Exploitable results – Chronopotentiometric carbonate detection with all-solid state ionophore-based electrodes

Result description

First time an all-solid-state chronopotentiometric ion sensing system based on selective ionophores, specifically for the carbonate anion.

Result type

* exploitable scientific result

Link to result

http://dx.doi.org/10.1021/ac5004163

References

Jarolímová, Z., Crespo, G. A., Xie, C., Ghahraman, M., Pawlak, M. and E. Bakker (2014) Chronopotentiometric Carbonate Detection with All-Solid-State Ionophore-Based Electrodes. Anal. Chem., 86(13), 6307–6314.

Exploitable results – Nitrite-selective electrode based on cobalt(II) tert-butyl salophen ionophore

Result description

The stability of Cobalt (II) ionophores within a PVC-based membrane was investigated by leaching experiments. Different membrane compositions were explored in order to reach the lowest possible limit of detection for a PVC-based nitrite selective polymeric membrane electrode containing this ionophore.

Result type

* product

Link to result

http://dx.doi.org/10.1002/elan.201300607

References

Néel, B., Ghahraman Afshar, M., Crespo, G. A., Pawalak, M., Dorokhin, D. and E. Bakker (2014) Nitrite-Selective Electrode Based On Cobalt(II) tert-Butyl-Salophen Ionophore. Electroanalysis, 26(3), 473–480.

Exploitable results – Development and deployment of chemical sensor probes for environmental sensing in aquatic environments

Result description

Environmental sensing of aquatic systems via the development and deployment of chemical sensor probes.

Result type

* exploitable scientific result

Link to result

http://dx.doi.org/10.2533/chimia.2014.772

References

Bakker, E., Tercier-Waeber, M.-L., Cherubini, T., et al. (2014) Environmental Sensing of Aquatic Systems at the University of Geneva. CHIMIA International Journal for Chemistry, 68(11), 772-777(6)

Exploitable results – Antifouling membrane integrated renewable gold microelectrode for in situ detection of Arsenic (III)

Result description

The development of a microelectrode consisting of a gel integrated renewable gold nanoparticles plated iridium-based microelectrode (Au-GIME). The gel minimizes fouling problems by hindering diffusion of organic matters and inorganic colloids/macromolecules toward the sensor surface. This contributes to the development of robust and sensitive analytical tools capable of direct, continuous in-situ Arsenic (III) sensing in the environment.

Result type

* product

Link to result

http://dx.doi.org/10.1039/C5AY01941A

References

Touillouz, R., Tercier-Waeber, M.-L. and E. Bakker (2015) Antifouling membrane integrated renewable gold microelectrode for in situ detection of As(III). Anal. Methods, 7, 7503-7510.