Publications by Hongyan Bi | EPFL Graph Search

Electrochemical Detection of Free Chlorine at Inkjet Printed Silver Electrodes

Hubert Girault, Hongyan Bi, Fernando Cortes Salazar, Véronique Amstutz, Andreas Stephan Lesch, Milica Jovic

A low-cost, reliable and sensitive electrochemical method for free chlorine analysis in water using inkjet printed silver electrodes is presented. Free chlorine detection was based on linear sweep voltammetry (LSV) analysis of AgCl/Ag2O films formed over a ...

Elsevier Science Sa2015

Controlling the specific enrichment of multi-phosphorylated peptides on oxide materials: aluminium foil as a target plate for laser desorption ionization mass spectrometry

Hubert Girault, Mohamad Hojeij, Hongyan Bi, Manuel Alejandro Méndez Agudelo, Liang Qiao

A specific multi-phosphopeptide enrichment method is presented to complement current phosphopeptide isolation strategies that normally bias mass spectrometry analysis towards the detection of mono-phosphopeptides. An adsorption model is developed that show ...

2010

Electrochemical reactions and ionization processes

Hubert Girault, Michel Prudent, Niels Erik Lion, Mélanie Abonnenc, Hongyan Bi, Liang Qiao

Electrochemical or photo-electrochemical reactions in both electrospray ionization and laser desorption ionization are discussed stressing the role of the electrode reaction in influencing the ionization process. In particular, upon application of a high v ...

2010

Mass Spectrometry Based Analysis and Bioanalysis

Hongyan Bi

MS (mass spectrometry) has been developed as an important analytical tool to study large molecules including polymer macromolecules and proteins. Its instrumentation technique including ionization methods, mass analyzer and detector systems has been greatl ...

EPFL2010

Photocatalytic Redox Reactions for In-Source Peptide Fragmentation

Hubert Girault, Hongyan Bi, Jérôme Waser, Liang Qiao

In-source photocatalytic redox reactions based on a photosensitive target plate have been developed to realize peptide fragmentation during laser desorption ionization. Sample peptides and glucose are simply deposited on a spot of sintered TiO2 nanoparticl ...

2009

Kinetics of Proteolytic Reactions in Nanoporous Materials

Hubert Girault, Hongyan Bi, Liang Qiao

Proteolysis with proteases preloaded within nanopores of porous material is a very fast process, where proteins can be digested in minutes compared to the conventional bulk enzyme reactions taking place over hours. To model this surprising phenomenon, a mo ...

American Chemical Society2009

TiO2 Printed Aluminum Foil: Single-Use Film for a Laser Desorption/Ionization Target Plate

Valérie Devaud, Hubert Girault, Hongyan Bi, Liang Qiao

Single-use aluminum foil-based laser desorption/ionization (LDI) target plates have been developed for mass spectrometry (MS) analysis and provide detection results comparable to those of commercial stainless steel plates while offering a convenient way to ...

2009

In-source photocatalytic reduction of disulfide bonds during laser desorption ionization

Hubert Girault, Hongyan Bi, Liang Qiao

A photosensitive plate based on sintered TiO2 nanoparticles has been developed to carry out in-source photo-induced reductions for cleavage of disulfide bridges using glucose as a hole scavenger during laser desorption ionization. ...

2008