Skip to main content
Article
Structural identification of hindered amine light stabilisers in coil coatings using electrospray ionisation tandem mass spectrometry
Faculty of Science - Papers (Archive)
  • Troy Lowe, University of Wollongong
  • Martin Paine, University of Wollongong
  • David Marshall, University of Wollongong
  • Larry Hick, University of Wollongong
  • Jenny Boge, University of Wollongong
  • Philip Barker, BlueScope Steel Research
  • Stephen J. Blanksby, University of Wollongong
RIS ID
33704
Publication Date
1-1-2010
Publication Details

Lowe, T. A., Paine, M. R., Marshall, D. L., Hick, L. A., Boge, J. A., Barker, P. J. & Blanksby, S. J. (2010). Structural identification of hindered amine light stabilisers in coil coatings using electrospray ionisation tandem mass spectrometry. Journal of Mass Spectrometry, 45 (5), 486-495.

Abstract
Hindered amine light stabilisers (HALS) are the most effective antioxidants currently available for polymer systems in postproduction, in-service applications, yet the mechanism of their action is still not fully understood. Structural characterisation of HALS in polymer matrices, particularly the identification of structural modifications brought about by oxidative conditions, is critical to aid mechanistic understanding of the prophylactic effects of these molecules. In this work, electrospray ionisation tandem mass spectrometry (ESI-MS/MS) was applied to the analysis of a suite of commercially available 2,2,6,6- tetramethylpiperidine-based HALS. Fragmentationmechanisms for the [M + H]+ ions are proposed, which provide a rationale for the product ions observed in theMS/MS andMS3 mass spectra of N-H, N-CH3, N-C(O)CH3 and N-OR containing HALS (where R is an alkyl substituent). A common product ion at m/z 123 was identified for the group of antioxidants containing N-H, N-CH3 or N-C(O)CH3 functionality, and this product ion was employed in precursor ion scans on a triple quadrupole mass spectrometer to identify the HALS species present in a crude extract from of a polyester-based coil coating. Using MS/MS, two degradation products were unambiguously identified. This technique provides a simple and selective approach to monitoring HALS structures within complexmatrices.
Grant Number
ARC/LP0775032
Citation Information
Troy Lowe, Martin Paine, David Marshall, Larry Hick, et al.. "Structural identification of hindered amine light stabilisers in coil coatings using electrospray ionisation tandem mass spectrometry" (2010)
Available at: http://works.bepress.com/sjblanksby/54/