U.S. flag

An official website of the United States government, Department of Justice.

Assessing the environmental ruggedness of paper spray ionization (PSI) coupled to a portable mass spectrometer operated under field conditions

NCJ Number
304813
Journal
International Journal of Mass Spectrometry Volume: 472 Dated: February 2022
Author(s)
Ashley R. Stelmack; William L. Fatigante; Shahnaz Mukta; Phoebe C. Clowser; Jessica M. Holtz; Christopher C. Mulligan
Date Published
February 2022
Annotation

In this work, a systematic characterization of paper spray ionization-mass spectrometry (PSI-MS) performance under variable environmental conditions was undertaken on a field-deployable MS system.

 

Abstract

Significant efforts have gone into coupling portable mass spectrometric systems and ambient ionization methods, with a culminating goal of field-based, point-of-need screening of harmful chemicals. While fieldable, ambient MS methods are an intriguing combination, ruggedness of these ionization methods in regard to naturally-occurring environmental conditions while operating in-situ, such as ambient temperature, relative humidity (RH) and wind, bears further investigation, as such reports are limited. In the current work, a systematic characterization of paper spray ionization-mass spectrometry (PSI-MS) performance under variable environmental conditions was undertaken on a field-deployable MS system. Of all conditions, the presence of wind speeds greater than 3 m/s (7 MPH) was shown to have the most substantial effect on the spectral attributes of signal intensity and duration of the PSI-MS spraying event. Generally, moderate ambient temperature and %RH produced the best spectral performance for PSI-MS. Heat maps were generated from field-collected data across variable temperature and %RH in an effort to inform general PSI-MS performance trends and guide on-site operation by potential users. (Publisher Abstract Provided)

 

Date Published: February 1, 2022