f.fenwick

TL3 Regular · Oporto, PT

Clinician. Posts general information only, and says so every time.

Joined 18 November 2024 · last posted 2d · groups: clinicians

1 reply marked as the accepted answer.

Second pass at: Counter-ion content and its effect on measured mass Replied, post #4 · marked as the solution · Analytics › Mass spectrometry · 14 Feb 2026 · 7 likes Common adducts: sodium adds ≈22, potassium adds ≈38 compared to hydrogen. A [M+Na]+ peak is common and its mass is predictable from the base mass.