Determination of the zirconium isotopic composition of the new isotopic standard NRC ZIRC-1 using MC-ICP-MS

Abstract

High precision analytical methods for ‘non-traditional’ stable isotopes rely upon standards for normalizing isotopic ratios, correcting instrumental mass fractionation, and comparing data between different laboratories. Zirconium isotope measurements are a...

A community-led calibration of the Zr isotope reference materials: NIST candidate RM 8299 and SRM 3169

“…Because of the rapid expansion of the Zr isotope system, multiple Zr isotope standards have been proposed, in particular for the characterization of mass-dependent effects, such as the SRM 3169 (ref. 26, 29–35), the candidate RM 8299 presented herein, 7–9,11,12,36–38 a single-element Zr solution from PlasmaCal (SCP Science) also known as the IPGP-Zr standard, 5,6,10,11,30,33,35,38–46 and the NRC ZIRC-1 (ref. 44, 47 and 48).…”

“…Because of the rapid expansion of the Zr isotope system, multiple Zr isotope standards have been proposed, in particular for the characterization of mass-dependent effects, such as the SRM 3169 (ref. 26,[29][30][31][32][33][34][35], the candidate RM 8299 presented herein, [7][8][9]11,12,[36][37][38] a single-element Zr solution from PlasmaCal (SCP Science) also known as the IPGP-Zr standard, 5,6,10,11,30,33,35,[38][39][40][41][42][43][44][45][46] and the NRC ZIRC-1 (ref. 44, 47 and 48).…”

“…26, 29–35), the candidate RM 8299 presented herein, 7–9,11,12,36–38 a single-element Zr solution from PlasmaCal (SCP Science) also known as the IPGP-Zr standard, 5,6,10,11,30,33,35,38–46 and the NRC ZIRC-1 (ref. 44, 47 and 48). Faced with such a proliferation of standards, it is critical to assess whether any of these materials are a suitable primary iRM against which all isotope data, both mass-dependent and independent isotope effects, should be reported.…”

“…Errors were added in quadrature. Note that n is reported as 7 in the original publication(Tian et al 2022), but the true number of measurements used in the study is 67 (see their Table2). c d 94 / 90 Zr RM 8299 calculated from the reported d 94 / 90 Zr of −0.008 ± 0.022& (2SD) of GJ-1 relative to IPGP-Zr, and the IPGP-Zr composition relative to RM 8299.…”

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…It is useful therefore, that a new Isotopic standard, NRC Zirc-1, has been prepared and is available commercially . 142 The material was systematically calibrated relative to the existing commonly used standard IPGP-Zr through a collaborative approach between two different laboratories. These used the sample-standard bracketing and double spike methods of analysis for ICP-MS detection.…”