Analytical Instrument Documents

JEOL Resources

rss

Documentation in support of your JEOL product.

GC-TOFMS Application: Natural Polymer Analysis by using Pyrolysis-GCxGC-MS - "Urushi" analysis with GCxGC/EI and GCxGC/PI

MSTips No.245

Introduction

A Japanese lacquer film called "Urushi" is a natural polymer that has been used as a paint and adhesive for living-wares and craft-wares for approximately 8,000 years. "Urushi" has a complex structure that researchers are trying to understand using pyrolysis-gas chromatograph/mass spectrometer (Py/GC/MS) system. Recently, we developed a new gas chromatograph/high resolution time-of-flight mass spectrometer (GC/HR-TOFMS) system that can be used for comprehensive two-dimensional GC (GCxGC) measurements. Additionally, we have developed a unique combination electron ionization/photoionization (EI/PI) ion source that can be used with this GC/HR-TOFMS system. In this work, we measured "Urushi" samples using this unique Py/GCxGC/HR-TOFMS system in combination with our new combination EI/PI ion source.

Result and discusion

In this study, we initially checked the thermal decomposition temperature for the Japanese lacquer film. Urushiols were observed as the main component in the lacquer film at 400°C. However, the thermal decomposition components indicating the lacquer film were observed at much higher levels at 500°C. As a result, we decided to use 500°C as the decomposition temperature for the GCxGC/EI and GCxGC/PI measurements.

GCxGC is a powerful chromatographic separation technique that provides both boiling point and polar separations simultaneously during a single sample measurement. We detected main components "Urushiols" in both EI and PI data. We also observed approximately 1,000 compounds in the lacquer sample using an automatic peak search function for the GCxGC/EI data. Additionally, this data showed several easily identifiable compound series such as hydrocarbons, carboxylic acids, aromatic ketones, alkyl phenols.

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
    2643
      JEOL USA, Inc.
      11 Dearborn Road
      Peabody, MA 01960
      © Copyright 2022 by JEOL USA, Inc.
      Terms of Use
      |
      Privacy Policy
      |
      Cookie Preferences