Search the Metabolomics Workbench Metabolite database with a list of precursor ions

Ion adducts (choose at least one with appropriate polarity)
Positive mode:
[M+H]+ [M+H-H2O]+ [M+Na]+ [M+NH4]+ [M+K]+ [M+2H]2+ [M+2Na]2+ [M+2Na-H]+
[M+H-EtnP]+ [M+H-SerP]+ [M+H-Hexose]+

Negative mode:
[M-H]- [M+Cl]- [M+HCOO]- [M+OAc]- [M-CH3]- [M+Na-2H]- [M+K-2H]-
[M-2H]2- [M-3H]3- [M-H-Ser]-

Neutral:
Neutral
Search lipids only:  Sort by:   Mass Tolerance (+/- m/z):
List of precursor ions :
Or upload a peaklist file

Search the Metabolomics Workbench Metabolite Database with a mass (m/z) value

Search the database by entering an m/z value in the "Mass" input box and selecting an appropriate ion type and mass tolerance range.
Mass(m/z):
Ion:
Mass Tolerance:



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