Contaminant and Adduct search

Search for Adducts, Repeating Units, Interferences and Contaminants in Mass Spectrometry

Mass of interest (singly charged, no digits) 

For example your contaminant is [M+H] 391.28 type in 391

Or you have  repeating units of 74 type in 74

Or when you have an adduct of +21.98 type in 22


Adduct Calculator (XLS file)
The Exact Mass Calculator
Contaminants in LCMS
Repeating units in LCMS
Mass differences in LCMS
Common Phthalates
Elements and Isotopes
Waters: Controlling Contamination
Waters: LCMS system maintenance