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Table 3 Interference corrections and δ138Ba values for selected standards

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

Standard Unseparated samplea Post-separationb ‰ correction fromc δ138Ba
LaT/BaT CeT/BaT LaT/BaT CeT/BaT La Ce
BCR-2 0.037 0.078 0.000013 0.00011 − 0.00002 0.00211 0.080 ± 0.029
   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
M4TFA0518d 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  
  1. n/a no data available
  2. aRatio of total La or Ce to Ba in unseparated sample based on values reported by Raczek et al. [37]
  3. bRatio of total La or Ce to Ba in separated Ba cut based on MC-ICPMS measured intensity of 138Ba, 139La, and 140Ce
  4. cTotal correction applied to δ138Ba value (per mil) from measured 139La and 140Ce during analysis
  5. dInternal lab standard—Marcellus Shale gas well produced water