Table 2. Doping test for V, Ti, Fe, Na and K and external precision tests by Allende, DTS-1 and Orgueil.

Samples	Interference Contribution (ppm)*	ε53Cr	2se	ε54Cr	2se	N/[ref.]
Cr-V-0%	0	0.00	0.00	–0.01	0.02	5
Cr-V-S14	24	0.00	0.02	0.00	0.02	[1]
Cr-V-0.5%	269	0.00	0.03	0.04	0.02	5
Cr-V-2.5%	1438	–0.06	0.02	–0.07	0.03	5
Cr-V-5%	2764	–0.09	0.01	–0.12	0.04	5
Cr-Ti-0%	0	–0.01	0.02	0.02	0.03	5
Cr-Ti-S14	1609	0.01	0.02	0.00	0.02	[1]
Cr-Ti-0.5%	7590	0.01	0.05	0.03	0.05	5
Cr-Ti-1%	14,269	0.02	0.03	0.06	0.08	5
Cr-Ti-2%	27,904	0.04	0.05	0.11	0.06	5
Cr-Fe-0%	0	0.00	0.01	0.01	0.02	5
Cr-Fe-0.01%	205	0.00	0.01	–0.08	0.04	5
Cr-Fe-S14	558	0.02	0.02	0.01	0.02	[1]
Cr-Fe-0.1%	2505	0.01	0.01	–0.04	0.05	5
Cr-Fe-0.5%	11,846	–0.01	0.02	–0.19	0.04	5
Cr-Na-50%		0.04	0.05	0.11	0.05	4
Cr-Na-100%		0.01	0.02	0.02	0.09	4
Cr-K-50%		0.03	0.05	0.04	0.02	4
Cr-K-100%		0.01	0.02	0.01	0.10	4
Allende-1		0.08	0.01	0.87	0.08	5
Allende-2		0.10	0.02	0.90	0.02	5
Allende-3		0.11	0.02	0.94	0.02	5
Allende-4		0.14	0.03	0.95	0.08	5
Allende-5		0.10	0.02	0.96	0.05	5
Average		0.10	0.04	0.92	0.07	2SD
DTS-1-1		0.05	0.01	0.11	0.07	5
DTS-1-2		0.05	0.01	0.16	0.05	5
DTS-1-3		0.06	0.03	0.18	0.07	5
DTS-1-4		0.04	0.03	0.15	0.03	5
DTS-1-5		0.07	0.02	0.19	0.07	5
Average		0.05	0.03	0.16	0.06	2SD
Orgueil-1		0.19	0.05	1.51	0.05	5
Orgueil-2		0.19	0.01	1.50	0.08	5
Average		0.19	0.00	1.50	0.01	2SD

Note: The references [1] Schiller et al. (2014). The doped samples are the corresponding SCP elemental standards of ICP-MS.

^*The corresponding V, Ti and Fe interference is for ⁵⁰Cr, ⁵⁰Cr and ⁵⁴Cr respectively.