Atmospheric pressure chemical ionization of explosives using alternating current corona discharge ion source

Ensuring public safety and security in today's mobile society requires robust detection technologies that are field-deployable and offer ever-improving sensitivity and specificity. Atmospheric pressure ionization is well suited to field-based sampling but pumping requirements to offset high gas loads can restrict an instrument's deployability and detection sensitivity. In the Special Feature, Usmanov and co-workers describe improved detection for nitrogen-containing explosive compounds using Atmospheric Pressure Chemical Ionization with an alternating current corona discharge source. An electromolded capillary yields a more stable ac corona allowing it to be positioned within 1mm from the inlet for detection limits in the tens of pg.

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