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Has anyone see a drop in sensitivity for d7-meprobamate and d7 carisoprodol over a 24-48 hr run?

Question asked by nalvarez on May 4, 2020
Latest reply on May 5, 2020 by nalvarez

We thought that the cleanliness had to do with the enzyme used but we are running a different enzyme on a recently cleaned instrument.  We have performed scans to make sure there isn't any contamination present.  Tunes look great. Start of run  24 hrs later  48 hrs later  Same samples re-injected but you can see the responses trending downward from the beginning of the run until they completely drop out.