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- Ionized acetates were studied to understand how oxygen-containing compounds form dimers in ion mobility spectrometry (IMS) using a drift tube and mass spectrometry.
- At the instrument's standard conditions, all acetates formed dimers, and their collision cross sections differed based on their structure, with dimers generally having a smaller size than their monomer counterparts.
- The research also showed that the reduced mobility of acetate dimers varied by the type of alkyl group, helping clarify how dimer formation impacts measurements in IMS.
Article Abstract
Ionized acetates were used as model compounds to describe gas-phase behavior of oxygen containing compounds with respect to their formation of dimers in ion mobility spectrometry (IMS). The ions were created using corona discharge at atmospheric pressure and separated in a drift tube before analysis of the ions by mass spectrometry. At the ambient operational temperature and pressure used in our instrument, all acetates studied formed dimers. Using a homolog series of n-alkyl-acetates, we found that the collision cross section of a dimer was smaller than that of a monomer with the same reduced mass. Our experiments also showed that the reduced mobility of acetate dimers with different functional groups increased in the order n-alkyl
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http://dx.doi.org/10.1016/j.jasms.2008.05.024 DOI Listing Publication Analysis
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