Apatite Reference Materials for SIMS Microanalysis of Isotopes and Trace Elements

Abstract

Twelve apatite samples have been tested as secondary ion mass spectrometry (SIMS) reference materials. Laser ablation-inductively coupled plasmamass spectrometry (LA-ICP-MS) analysis shows that the SLAP, NUAN and GR40 apatite gems are internally homogeneous, with most trace element mass fractions having 2 standard deviations (2s) ≤ 2.0%. BR2, BR5, OL2, AFG2 and AFB1, which have U > 63 µg g -1 , 206 Pb/ 204 Pb > 283, and homogeneous SIMS U-Pb data, have respective isotope dilution thermal ionisation mass spectrometry (ID-TIMS)

Atomic spectrometry update – a review of advances in environmental analysis

“…Recommended and information values for 32 elements were reported together with their uncertainties (2SD). Of the 12 apatite samples tested by Kennedy et al 183 as potential RMs for SIMS analysis, three (SLAP, NUAN and GR40) were internally homogeneous. Most of the trace element mass fractions determined by LA-ICP-MS had precisions of ≤2.0%.…”