Table 3 Results of 90Sr/88Sr measurements of the environmental and biological samples.

From: A part per trillion isotope ratio analysis of 90Sr/88Sr using energy-filtered thermal ionization mass spectrometry

Sample

Reference 90Sr/88Sr1

90Sr/88Sr2

NASS-6

–

− 0.1 (2.5) × 10−12

JCp-1

–

0.3 (2.9) × 10−12

–

0.5 (3.4) × 10−12

IAEA 156

4.4 (0.9) × 10−11

3.26 (0.30) × 10−11

IAEA 330

7.9 (1.7) × 10−11

6.7 (1.3) × 10−11

7.6 (1.7) × 10−11

5.76 (0.43) × 10−11

Ash 1

1.57 (0.15) × 10−11

1.38 (0.53) × 10−11

1.56 (0.15) × 10−11

1.32 (0.42) × 10–11

Ash 2

1.16 (0.11) × 10−11

1.40 (0.39) × 10–11

1.15 (0.11) × 10−11

1.33 (0.27) × 10–11

  1. 1Decay corrected to the reference date (see Table S2 in supporting information).
  2. 2Noise corrected values using the average 90Sr count rate of NIST SRM 987 measurements (see text for details). All the errors in the parenthesis are 2 SD.
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