A single column separation method for barium isotope analysis of geologic and hydrologic materials with complex matrices

Table 3 Interference corrections and δ¹³⁸Ba values for selected standards

Standard	Unseparated sample^a		Post-separation^b		‰ correction from^c		δ¹³⁸Ba
Standard	La_T/Ba_T	Ce_T/Ba_T	La_T/Ba_T	Ce_T/Ba_T	La	Ce	δ¹³⁸Ba
BCR-2	0.037	0.078	0.000013	0.00011	− 0.00002	0.00211	0.080 ± 0.029
BCR-2			0.000013	0.00011	− 0.00002	0.00209	0.071 ± 0.026
AGV-1	0.032	0.056	0.000011	0.000048	− 0.00001	0.00090	0.067 ± 0.030
M4TFA0518^d	n/a	n/a	0.000018	0.000034	− 0.00002	0.00064	0.948 ± 0.034
			0.000018	0.000034	− 0.00002	0.00064	0.936 ± 0.037
			0.000018	0.000035	− 0.00002	0.00066	0.902 ± 0.033
SRM 3104a	n/a	n/a	0.0000053	0.0000016	− 0.00001	0.00003

n/a no data available
^aRatio of total La or Ce to Ba in unseparated sample based on values reported by Raczek et al. [37]
^bRatio of total La or Ce to Ba in separated Ba cut based on MC-ICPMS measured intensity of ¹³⁸Ba, ¹³⁹La, and ¹⁴⁰Ce
^cTotal correction applied to δ¹³⁸Ba value (per mil) from measured ¹³⁹La and ¹⁴⁰Ce during analysis
^dInternal lab standard—Marcellus Shale gas well produced water

ISSN: 1467-4866