Figure 1

Any of the boxed signal in this figure can correctly be called a chromatogram , a mass spectrum , or a profile spectrum as defined by existing CVs. Additionally, the IUPAC terms isotope pattern and isotope cluster can refer to the signal in box 1, 2, or 3. It is clear that these terms pertain to too many distinct concepts to be clear. Note that existing nomenclatures have no way of distinguishing between these distinct data concepts, which can include parts of one or more combined signals.