Michel Prudent

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About the Electrospray Ionization Source in Mass Spectrometry: Electrochemistry and On-chip Reactions

Hubert Girault, Niels Erik Lion, Christophe Roussel, Manuel Alejandro Méndez Agudelo, Michel Prudent, Joël Stéphane Rossier, Bin Su

The present work shows that the electrochemical properties of electrospray ionization (ESI) can be used to add functions to the process. As example, we show how the choice of the electrode material can be used to study interactions between metal ions and b ...

2009

Electrospray ionization mass spectrometry : electrochemistry and on-chip reactions for bioinorganic analyses

Michel Prudent

Metal ions are essential elements in all living systems. Their detections and identifications in biological processes require different methodologies. Mass spectrometry is one of the commonly used techniques in bioinorganic analyses to fulfill these requir ...

EPFL2009

Human fingerprint imaging by scanning electro-chemical microscopy

Hubert Girault, Fernando Cortes Salazar, Michel Prudent, Christophe Champod

Schweizerische Chemische Gesellschaft2009

Microfabricated Dual Sprayer for On-Line Mass Tagging of Phosphopeptides

Hubert Girault, Niels Erik Lion, Michel Prudent, Joël Stéphane Rossier

Phosphopeptides tagging reactions by dinuclear zinc(II) complexes (1,3-bis[bis(2-pyridylmethyl)amino]-propan- 2-olato dizinc(II)3+, called tag) were performed with a dual-channel microsprayer in electrospray ionization mass spectrometry. The reaction is fi ...

2008

H2O2 generation by decamethylferrocene at a liquid | liquid interface

Hubert Girault, Anne-Clémence Corminboeuf, Michel Prudent, Bin Su, Mohamad Hojeij, Raheleh Partovi Nia, Zdenek Samec

Hydrogen peroxide generation at a liquid|liquid interface occurs with a yield of 20 % with respect to the concentration of reducing agent (decamethylferrocene). The liquid|liquid interface supplies electrons from the reducing agent and protons from the aqu ...

Wiley-VCH Verlag GmbH2008

On-line Electrogeneration of Copper-Peptide Complexes in Microspray Mass Spectrometry

Hubert Girault, Michel Prudent

The interaction of copper ions with peptides was investigated by electrospray mass spectrometry. Two electrospray micro-emitters were compared, the first one with a platinum electrode using a copper(II) electrolyte solution containing a peptide sample, and ...

2008

Biphasic Electrospray Ionization for the Study of Interfacial Complexes

Hubert Girault, Manuel Alejandro Méndez Agudelo, Michel Prudent

Biphasic electrospray ionization (BESI) mass spectrometry is achieved by using a dual-channel microsprayer, where channels filled with different immiscible phases meet at the Taylor cone. Two types of interfacial complexation reactions have been studied: t ...

The Japan Society of Analytical Chemistry / The Japan Society for Analytical Chemistry2008

Peptide-Phospholipid Complex Formation at Liquid-Liquid Interfaces

Hubert Girault, Manuel Alejandro Méndez Agudelo, Michel Prudent, Bin Su

Two peptides known to interact with receptors embedded in cell membranes, angiotensin III (AngIII) and Leuenkephalin(LeuEnk), were studied electrochemically at the interface formed between two immiscible electrolyte solutions modified by an adsorbed monola ...

2008

SECM imaging of MMD-enhanced latent fingermarks

Hubert Girault, Michel Prudent, Christophe Champod

Scanning electrochemical microscopy (SECM) has been used to image latent fingermarks enhanced by adsorption of gold nanoparticles onto which silver is chemically deposited, a process known as ‘‘multi-metal-deposition’’ (MMD). ...

Royal Society of Chemistry2007

Electrochemical generation of Cu(I) complexes in aqueous solutions studied by on-line mass spectrometry

Hubert Girault, Christophe Roussel, Michel Prudent

Taking advantage of the electrochemical aspects of electrospray ionization (ESI) sources in positive ionization mode mass spectrometry (MS), aqueous copper complexes are electrogenerated using sacrificial copper electrodes. When using 8-hydroxyquinoline or ...

Elsevier2007

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