When analyzing a standard 4 ppm phenol solution in MeOH by LCMS, why do I see only an m/z of 241.2, not 95 (M+H) as expected?

I am using my LC/MS triple quad (ESI positive mode) to analyze a standard phenol solution in MeOH. The LC gradient is MeOH:water (0.1% formic acid), 5% to 95% over 12 min.

05 November 2023 9,069 2 View