. Author manuscript; available in PMC: 2021 Jul 9.

Published in final edited form as: J Radioanal Nucl Chem. 2020;324(1):10.1007/s10967-020-07075-y. doi: 10.1007/s10967-020-07075-y

Table 2.

Summarized mass spectrometer analysis conditions for isotope dilution mass spectrometry (IDMS) and plutonium isotopic composition (IC) measurements of the ²⁴⁴Pu Spike reference material

Laboratory	LLNL	LANL	CEA
Instrument (s)	Nu-Plasma HR MC-ICP-MS	Neptune Plus MC-ICP-MS IsotopX Phoenix MC-TIMS	Neptune MC-ICP-MS
Detection system (IDMS measurements)	²⁴⁴Pu and ²³⁹Pu on Faraday cups	²⁴¹Pu on axial ion counter ²³⁹Pu, ²⁴⁰Pu, ²⁴²Pu, ²⁴⁴Pu on Faraday cups	²⁴⁴Pu and ²³⁹Pu on Faraday cups
Detection system (IC measurements)	²⁴⁴Pu on Faraday cup ²³⁹Pu, ²⁴⁰Pu, ²⁴²Pu, ²⁴¹Pu on ion counters	MC-ICP-MS: ²⁴⁴Pu on Faraday cup ²³⁹Pu, ²⁴⁰Pu, ²⁴²Pu, ²⁴¹Pu on ion counters MC-TIMS: ²⁴⁴Pu on Daly detector ²³⁹Pu, ²⁴⁰Pu, ²⁴²Pu, ²⁴¹Pu on ion counters	²⁴⁴Pu on Faraday cup ²³⁹Pu, ²⁴⁰Pu, ²⁴²Pu, ²⁴¹Pu on ion counters
Introduction System	Cetac Aridus II	MC-ICP-MS:ESI Apex Omega MC-TIMS:Resin bead on Re filament	Scott Double Spray Chamber
Mass Bias CRM	CRM 137	IDMS: CRM 128 IC: CRM U005-A	IDMS: IRMM 186 IC: IAEA 8745–01
Quality control CRM	CRM 138, CRM 126-A, and IRMM 086	CRM 137 and CRM 138	CRM 137 and CRM 138
Corrections applied	Detector Baseline, Instrument Background, Detector Gains, Mass Bias	Detector Baseline, Instrument Background, Detector Gains, Mass Bias, Detector dead time	Detector Baseline, Instrument Background, Detector Gains, Mass Bias

CRMs for calibration and QC measurements that were not previously cited, are described in [14–18]. IAEA 8745–01 is not a CRM but has a Certificate of Isotopic Composition from IRMM specifying the metrologically traceable uranium isotopic ratio values for the material (SMS 7259, 30 May 1997)