The PMCS guide for the Shimadzu QP 2010+ states 69 should be the base peak. Why is the base peak 18?

Applies to: Chromatography QP2010 GCMS (GC/MS) | Tickets Solved: 0 | Rank: 16.5

Incorrect Base Peak

  • A base peak of 18 when using the Shimadzu signifies that there is an abundant amount of water present in the system.
  • This is common if the instrument has recently been placed under vacuum.
  • The instrument needs 24-48 hours under vacuum to remove water from the system.

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Keywords: base peak, water, 18, 69, tune, auto, shimadzu, gc/ms, hydrogen, vacuum, leak