The first comprehensive characterisation of elemental fractionation during laser sampling was reported by Fryer et al. (1995). By looking at relative changes in signals during a 4-minute ablation of NIST SRM 610, these workers calculated, for a wide range of elements, a fractionation index (FI) , which is a measure of elemental fractionation relative to the commonly used normalising element, Ca.
FRYER, B.J., JACKSON, S.E., AND LONGERICH, H.P. (1995): The design, operation and role of the laser-ablation microprobe coupled with an inductively coupled plasma-mass spectrometer (LAM-ICP-MS) in the earth sciences. Can. Mineral. 33, 303-312.
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