Instrument: Inductively Coupled Plasma Mass Spectrometer
An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer.
The ratio of 137Ba to138Ba was measured using laser ablation inductively coupled plasma-mass spectrometry (Thermo-Finnegan Element2 LA-ICP-MS; beam diameter = 5 lm; scan speed = 6 lm/sec; intensity = 35%; frequency 8 Hz).