Isotope Spectrum Studio

Build privately. Present only the evidence.

Custom spectrum

2–10 isotopes

Spectrum name

Input values

Ion charge

Isotope mass	Abundance	Remove

Presentation settings

Canvas

m/z decimals

Show graph title Show m/z values Show axis titles Show grid in Calculation and Answer modes Show exact peak values in Answer mode

Real-element presets use representative terrestrial isotopic compositions from the NIST Physical Measurement Laboratory. Peaks use nominal mass numbers for classroom calculations; natural samples can vary slightly.

Student view Keys: O observation · C calculation · A answer · F full screen

Weighted mean mass 127.80

Isotope mass	Abundance	m/z	Mass × abundance