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| addElements | Combine chemical formulae |
| adductNames | Retrieve names of supported adducts |
| adducts | Retrieve names of supported adducts |
| containsElements | Check if one formula is contained in another |
| countElements | Count elements in a chemical formula |
| internalStandardMixNames | Get names of internal standard mixes provided by the package |
| internalStandards | Get definitions for internal standards |
| mass2mz | Calculate mass-to-charge ratio |
| mz2mass | Calculate neutral mass |
| pasteElements | Create chemical formula from a named vector |
| standardizeFormula | Standardize a chemical formula |
| subtractElements | subtract two chemical formula |