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Table 3 Repeatability INAA measurements in obsidian matrix

From: Mediterranean and Near East obsidian reference samples to establish artefacts provenance

  Mean St. Dev. Min Max CV%
As 23.3 2.0 21.5 26.1 8.5
Ba 330 8 319 339 2.5
Ce 211 2 209 212 0.7
Co 1.36 0.11 1.23 1.51 8.1
Cr 0.845 0.073 0.710 0.982 8.6
Cs 18.8 0.4 18.2 19.1 2.0
Eu 2.03 0.07 1.92 2.11 3.4
Fe 24193 336 23690 24646 1.4
Hf 11.2 0.5 10.4 11.8 4.7
La 33.4 0.7 32.1 34.0 2.1
Nd 1048 19 1027 1069 1.8
Rb 276 11 264 291 4.1
Sb 2.85 0.15 2.65 3.02 5.3
Sc 2.26 0.11 2.09 2.32 4.9
Se 6.20 0.19 6.07 6.42 3.1
Sm 12.4 0.30 10.0 10.5 2.4
Sr 300 8 292 310 2.5
Ta 3.41 0.07 3.27 3.46 2.0
Th 31.7 0.8 30.3 32.3 2.5
U 6.81 0.04 6.76 6.85 0.7
Yb 4.97 0.11 4.83 5.07 2.2
Zn 71.0 2.3 67.1 73.8 3.2
Zr 421 12 401 429 2.9
  1. Mean value (μg g−1), standard deviation, minimum and maximum values (μg g-1) along with the Coefficient of Variation (CV%) obtained analyzing the same obsidian sample (deposit in Procida Mt. in Gulf of Naples) by means of 7 γ-spectrometry measures.