Chemi-ionization reactions involve the formation of ionic products through the transfer of electrons during collisions between excited and ground-state species. These processes, which can occur in ...

EI was first developed by Dempster in 1918 2 and can be considered a fairly harsh method of molecule fragmentation and ionization. In EI, the molecules of the analyte must be in the vapor phase to ...

The QTOF‐GCMS instrument integrates the excellent mass accuracy of the quadrupole time‐of‐flight (QTOF) mass spectrometer with the proven gas phase chromatography techniques. 1 Da (mass accuracy in ...

A quick, accurate and highly sensitive process to reliably detect minute traces of explosives on luggage, cargo or traveling passengers has been demonstrated. The vapor detection technology accurately ...

Sensitive and quick detection of airborne molecular contaminants (AMCs) in semiconductor fabrication facilities is crucial to the quality and efficiency of production. Fabs have the potential to host ...

RICHLAND, Wash. – A quick, accurate and highly sensitive process to reliably detect minute traces of explosives on luggage, cargo or travelling passengers has been demonstrated by scientists at the ...