Nu Instruments | FastScan Ion Optics for High Accuracy Isotope Ratio Measurements 

Discover how the Attom FastScan Ion Optics enables rapid isotope ratio measurements across a wide mass range without introducing additional mass discrimination effects.

Peak coincidences of Pb isotopes deflected to two different magnet park positions (see text for details). A: Magnet park position is 205.7 if only 204Pb, 206Pb, 207Pb and 208Pb are selected for analysis. B: Magnet park position is 218.6 if 204Pb, 206Pb, 207Pb and 208Pb plus 238U are selected for analysis.

Accurate isotope ratio analysis requires precise control of mass discrimination effects. Traditional peak jumping approaches can introduce measurement biases when changing ion energies during acquisition.


The Attom FastScan Ion Optics technology allows rapid movement between isotopes using electrostatic beam steering while maintaining constant magnetic field and acceleration voltage conditions.


Experimental studies using lead and thallium isotope ratios demonstrated excellent accuracy and reproducibility across multiple scan ranges. Results confirmed that isotope ratio measurements remain independent of scan range.

Attom HR ICP-MS Instrument

Key Takeaways:

  • Rapid isotope measurements across up to 40% relative mass range.
  • No additional mass discrimination introduced by FastScan technology.
  • Delivers accurate and reproducible isotope ratio data.
Man adjusts part of mass spec instrument

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