Analytical Instrument Documents

JEOL Resources

rss

Documentation in support of your JEOL product.

Measurement of synthetic polymers: Polyethylene Glycol

Polyethylene glycol (PEG) 1000 and 8000 were measured by using the JMS-S3000 SpiralTOF. The [M+H]+ peaks for PEG with the basic monomer units of 44u (Fig. 1) were observed for each sample. The mass spectrum for PEG1000 and an expanded view around m/z 1,000 are shown in Fig. 2. The resolving power at m/z 1009 is approximately 60,000 (FWHM). The mass difference between the 21, 22 and 23-mers showed very good agreement with the theoretical mass of the PEG monomer. The full mass spectrum for PEG8000 is shown in Fig. 3(a). The comparison between the observed and simulated isotopic pattern (R 35,000) for the 226mer are shown in Fig. 3(b). The observed isotopic pattern is in very good agreement with the calculated isotopic distribution.

Attached Files
Showing 0 Comment


Comments are closed.

Other Resources

Image Gallery
  • View a selection of NMR and MS spectra
  • Walkup NMR
  • See how the Delta NMR software allows users to just "walk up" and start NMR experiments
  • Mass Spec Reference Data
  • View our page of useful molecular references for Mass Spec
  • Tutorials (Mass Spec)
  • Documents on the basics of mass spectrometry
  • Delta NMR software Tutorials
  • Videos on how to use the Delta NMR software
  • No-D NMR
  • Description of No-D NMR and how it can be used to eliminate the need for deuterated solvents
  • Non Uniform Sampling (NUS)
  • Description of how NUS is used to greatly reduce the time needed for running NMR experiments
  • NMR Basics
  • Overview of the Basics of NMR Theory
  • NMR Magnet Destruction
  • See our presentation of the slicing open of a JEOL Delta-GSX 270 MHz NMR Magnet
  • Media

    Corona - Glow Discharge (DART Ion Source)

    January 28, 2022
    2637
      JEOL USA, Inc.
      11 Dearborn Road
      Peabody, MA 01960
      © Copyright 2022 by JEOL USA, Inc.
      Terms of Use
      |
      Privacy Policy
      |
      Cookie Preferences