Headspace GCMS v Desorption Mass Spec

Objective

The purpose of this work was to compare Headspace Gas Spectroscopy (HS-GCMS) and Desorption Mass Spectroscopy (DMS) while characterizing and identifying the organic volatiles from an unknown sample reported to be a buildup on an extruder used for polyolefin processing.

Conclusions

DMS is a very sensitive technique which provides valuable information about trace volatile and semi-volatile components. When analyzed by HS-GCMS the low boiling compounds are preferentially evolved into the headspace gas. In general, the signal strength for the most volatile components is increased in HS-GCMS as compared to DMS due to the ability to increase sample size and its selectivity for component with higher vapor pressures.

Result

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