Presentation Profile
Comparison of New and Used Pump Oil by Multiple Mass Spectral Methods
Currently Scheduled: 10/15/2024 - 8:45 AM - 9:15 AM
Room: Orchid
Main Author
Kirk R. Jensen - JEOL USA, Inc.
- Robert B. Cody - JEOL USA, Inc.
Abstract:
New and used pump oils were measured using two-dimensional gas chromatography (GCxGC)-high-resolution time-of-flight mass spectrometry (HRTOFMS) using both electron ionization (EI) and field ionization (FI). Field desorption (FD) measurements were also done to identify molecular ions and calculate chemical formulas. Direct analysis in real-time (DART) HRTOFMS was also used to examine the molecular weight distributions and confirm the identities of compounds found in GCxGC-HRTOFMS measurements. Even with GCxGC separation, a large unresolved complex mixture (UCM) was observed in the pump oils; however, antioxidant precursors and byproducts could still be identified, and would not have been observable without GCxGC separation.
