. Author manuscript; available in PMC: 2019 Feb 1.

Published in final edited form as: Int J Mass Spectrom. 2016 Mar 8;403:15–26. doi: 10.1016/j.ijms.2016.02.003

EA1.

Samples analyzed and chemical protocol employed.

Sample	Rock type	Ru(μgg⁻¹)^a	Digestion	Isolation/purification^b	Chemical yields (%)^c
C1	Chromitite	16.68	Carius tube	1°, 2°, MD	~20
C2	Chromitite	5.908	Carius tube	1°, 2°, MD	~20
C3_01	Chromitite	20.06	Carius tube	1°, 2°, MD	~20
C3_02	Chromitite	20.06	Carius tube	1°, MD	~20
L5-3	Os-Ir-Ru alloy	5.67 wt%	Carius tube	MD	N/A
M3-6	Os-Ir-Ru alloy	14.10 wt%	Carius tube	MD	N/A
M8-2	Os-Ir-Ru alloy	14.66 wt%	Carius tube	MD	N/A
Hoba	IVB iron	29.15	Teflon^® beaker	1°, 2°, MD	~20
SS-A^d	-	-	Carius tube	MD	N/A
SS-B^d	-	-	Carius tube	MD	N/A

Chromitite data from [15]; Os-Ir-Ru alloy data from [16]; Hoba data from [17].

1° refers to primary cation column; 2° refers to secondary anion column, MD refers to microdistillation.

Chemical yields from alloy chemistry and spike-standard mix chemistry are unknown due to the unknown quantity of the sample initially digested.

SS-A refers to spike standard mix A; SS-B refers to spike standard mix B.