You are here:
Rapid, Automated Determination of Elemental Compositions of Ions in Mass Spectra Obtained with an Open-Air Ion Source (2 of 2)
Citation:
GRANGE, A. H. AND G. W. Sovocool. Rapid, Automated Determination of Elemental Compositions of Ions in Mass Spectra Obtained with an Open-Air Ion Source (2 of 2). Presented at American Society of Mass Spectrometry, Denver, CO, June 01 - 05, 2008.
Impact/Purpose:
Presentation
Description:
An inexpensive autosampler for a DART/TOFMS provides mass spectra from analytes absorbed on 76 cotton swab, wipe samples in 7.5 min. A field sample carrier simplifies sample collection and provides swabs nearly ready for analysis to the lab. Applications of the high throughput provided by these devices could be rapid characterization, real-time monitoring of remediation, and documentation of thorough cleanups of dispersive events, Superfund sites, and clandestine drug labs with high spatial resolution. The trade off is that composite mass spectra are often obtained. For dispersed chemicals, rapid identification of one or more analytes is essential for assessing risks to people. Software to deconvolute composite mass spectra was developed to address this need. Precursor ions, product ions, and neutral losses are correlated based on exact masses and relative isotopic abundances (RIAs).