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. Author manuscript; available in PMC: 2020 Mar 12.
Published in final edited form as: J Radioanal Nucl Chem. 2019;322(3):10.1007/s10967-019-06711-6. doi: 10.1007/s10967-019-06711-6

Table 1.

Summarized MC-ICP-MS measurement conditions for protactinium and uranium isotopic ratio analyses of IDMS samples for the 231Pa RM solution and the 233Pa S solution

Parameter Pa IDMS analyses U IDMS analyses
Instrument Nu-plasma HR multi-collector inductively-coupled plasma mass spectrometer
Collectors 231Pa L2 Faraday cup, 233Pa axial Faraday 233U L3 Faraday cup, 238U H1
cup Faraday cup
Introduction system Cetac Aridus II (Omaha, NE, USA)
Nebulizer Cetac PFA Nebulizer
Nebulizer gas flow 0.9 L/min 0.9 L/min
Solution uptake 100 μL/min 100 pL/min
Mass bias CRM CRM U010 [22] CRM U010
Quality control CRM U005-A [23] and CRMs 129-A [24] CRM U005-A and CRM 112-A
Corrections applied Detector baseline, instrument background, detector gains, mass bias

Revised uranium isotopic ratio values cited in [21] were used for CRMs U010 and U005-A