Analysis of VOCs in Liquids through Vaporization in a Tubular Oven Monitored by Chemical Ionization Mass Spectrometry.

The analysis of chemical compounds present at trace levels in liquids is important not only for environmental measurements but also, for example, in the health sector. The reference technique for the analysis of Volatile Organic Compounds (VOCs) in liquids is GC, which is difficult to use with an aqueous matrix. In this work, we present an alternative technique to GC to analyze VOCs in water.

Detection of f.sp. race 1 and 4 via race-specific real-time PCR and target enrichment.

f.sp. (Fol) causes a vascular disease in lettuce that results in significant yield losses.

Monitoring of -hexane degradation in a plasma reactor by chemical ionization mass spectrometry.

-Hexane (CH) removal and conversion are investigated in a filamentary plasma generated by a pulsed high-voltage Dielectric Barrier Discharge (DBD) at atmospheric pressure and room temperature in a dry N/O (20%) mixture with CH. The degradation of -hexane and the by-product formation are analyzed in real-time using a high-resolution Fourier Transform Ion Cyclotron Resonance (FT-ICR) mass spectrometer coupled with Chemical Ionization (CI). As alkanes are reacting slowly with HO ions, two precursor ions were used: O to follow the -hexane mixing ratios and HO to follow the mixing ratios of organic by-products.

Insights into non-thermal plasma chemistry of acetone diluted in N/O mixtures: a real-time MS experiment.

Understanding non-thermal plasma reactivity is a complicated task as many reactions take place due to a large energy spectrum. In this work, we used a well-defined photo-triggered non-filamentous discharge to study acetone decomposition in N/O gas mixtures. The plasma reactor is associated to a compact chemical ionization FTICR mass spectrometer (BTrap) in order to identify and quantify in real-time acetone and by-products in the plasma.