P. M-L Sinues, E. Criado, G. Vidal-de-Miguel

The fact that electrosprays of pure solvents can efficiently ionize gas-phase analytes has been known for decades, although this method has not been widely exploited. With the advent of ambient mass spectrometry, this approach is becoming increasingly popular. However, the mechanism by which vapors become ionized remains largely unknown …

L. Meier, S. Schmid, C. Berchtold and R. Zenobi

In this study, we investigated how binary mixtures of compounds influence each other's signal intensity in electrospray ionization (ESI), extractive electrospray ionization (EESI) and secondary electrospray ionization (SESI) experiments. The experiments were conducted using a series of homologous primary amines (from 1-butyl to 1- decylamine) …

H. D. Bean, J. Zhu, J. E. Hill

Secondary electrospray ionization mass spectrometry (SESI-MS) is a method developed for the rapid detection of volatile compounds, without the need for sample pretreatment. The method was first described by Fenn and colleagues and has been applied to the detection of illicit drugs and explosives, the characterization of skin volatiles, and the analysis of breath.

Gerardo Gamez, Liang Zhu, Andreas Disko, Huanwen Chen, Vladimir Azov, Konstantin Chingin, Gunter Kramerb and Renato Zenobi

Valproic acid pharmacokinetics and ingestion in humans can be monitored through a novel biomarker in exhaled breath.

P. M-L Sinues, L. Zingaro, A. Finiguerra and S. Cristoni

A series of fatty acids among other compounds have recently been detected in breath in real time by secondary electrospray ionization mass spectrometry (SESI-MS). Our main aim in this work was to quantify their abundance in breath calibrating the system with standard vapors and extend the study to a control group for several days, both under fasting conditions and after sucrose intake.