Characterizing synthetic polymers and additives using new ionization methods for mass spectrometry. (23rd April 2014)

• Record Type: Journal Article
• Authors: El‐Baba, Tarick J.; Lutomski, Corinne A.; Wang, Beixi; Trimpin, Sarah
• Is Part Of: Rapid communications in mass spectrometry. Volume 28:Number 11(2014)
• Page Start: 1175
• Page End: 1184
• Publication Date: 2014-04-23
• Subjects: Mass spectrometry -- Periodicals; 543.65
• DOI: 10.1002/rcm.6881
• Languages: English
• ISSNs: 0951-4198

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="rcm6881-sec-0001" sec-type="section"> <title>RATIONALE</title> <p>New <italic>inlet</italic> and <italic>vacuum</italic> ionization methods provide advantages of specificity, simplicity and speed for the analysis of synthetic polymers and polymer additives directly from surfaces such as fibers using mass spectrometry (MS) on different commercial mass spectrometers (Waters SYNAPT G2, Thermo LTQ Velos).</p> </sec> <sec id="rcm6881-sec-0002" sec-type="section"> <title>METHODS</title> <p>We compare <italic>inlet</italic> ionization methods with the recently discovered <italic>vacuum</italic> ionization method. This method, termed matrix assisted ionization <italic>vacuum</italic> (MAIV), utilizes the matrix 3‐nitrobenzonitrile (3‐NBN) for the analysis of synthetic polymers and additives without additional energy input by simply exposing the matrix:analyte:salt to the vacuum of the mass spectrometer. Matrix:analyte:salt samples can be introduced while dry (surfaces, e.g. glass slides, pipet tips) or slightly wet (e.g. filter paper, pipet tips).</p> </sec> <sec id="rcm6881-sec-0003" sec-type="section"> <title>RESULTS</title> <p>Compounds ionized by these methods can be analyzed in both positive and negative detection modes through cationization or deprotonation, respectively. The dynamic range of the experiment can be enhanced, as well as structural analysis performed, by coupling the <italic>vacuum</italic> ionization method with ion mobility spectrometry mass spectrometry (IMS‐MS) and tandem mass spectrometric (MS/MS) fragmentation.</p> </sec> <sec id="rcm6881-sec-0004" sec-type="section"> <title>CONCLUSIONS</title> <p>The specificity of 3‐NBN matrix to ionize small and large nonvolatile analyte molecules by MAIV makes this matrix a good choice for observing low‐abundance additives in the presence of large amounts of synthetic polymer using MS. Copyright © 2014 John Wiley & Sons, Ltd.</p> </sec> </abstract>