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Table T14. Precision (reproducibility) of ICP-AES analyses on the JY-2000, Expedition 312.

Standard:
 BAS-140 (N = 12) BAS-148 (N = 13) BAS-206 (N = 13) BAS-312 (N = 12)
Average Standard
deviation		 RSD
(%)		 Average Standard
deviation		 RSD
(%)		 Average Standard
deviation		 RSD
(%)		 Average Standard
deviation		 RSD
(%)
Major element oxide (wt%):
SiO2 50.85 0.33 0.66 50.09 0.32 0.63 49.35 0.27 0.54 49.86 0.35 0.70
TiO2 1.00 0.01 1.19 0.90 0.01 1.36 2.09 0.04 1.71 1.33 0.02 1.62
Al2O3 14.34 0.08 0.55 15.55 0.08 0.50 13.87 0.05 0.33 15.41 0.10 0.63
Fe2O3 11.19 0.09 0.77 9.98 0.05 0.55 14.58 0.09 0.62 10.77 0.06 0.53
MnO 0.19 0.00 0.82 0.17 0.00 1.06 0.26 0.00 0.16 0.18 0.00 1.19
MgO 8.18 0.05 0.66 8.63 0.05 0.61 6.73 0.05 0.67 7.79 0.05 0.63
CaO 12.51 0.11 0.91 12.88 0.09 0.72 9.92 0.03 0.34 11.89 0.10 0.88
Na2O 1.80 0.02 1.10 2.05 0.01 0.58 2.83 0.02 0.79 2.44 0.03 1.22
K2O 0.01 0.00 18.78 0.05 0.00 3.64 0.18 0.00 1.23 0.06 0.00 4.11
P2O5 0.08 0.05 61.20 0.07 0.03 49.18 0.19 0.02 12.08 0.09 0.03 27.93
Totals: 100.12 0.36 0.36 100.37 0.44 0.44 100.00 0.28 0.28 99.83 0.44 0.45
Trace element (ppm):
Ba BDL — — BDL — — 42.75 1.04 2.44 9.54 0.28 2.96
Sr 41.50 1.02 2.47 58.22 0.47 0.81 99.16 0.61 0.61 98.85 1.19 1.20
Zr 45.85 0.61 1.34 44.62 0.52 1.17 111.19 1.02 0.92 71.43 0.86 1.20
Y 23.88 0.22 0.92 22.33 0.13 0.58 34.14 0.05 0.14 24.65 0.22 0.91
Sc 40.17 0.37 0.91 39.40 0.42 1.05 42.59 0.49 1.15 39.99 0.34 0.85
V 307.58 2.12 0.69 264.40 2.21 0.84 421.96 3.29 0.78 295.38 2.07 0.70
Cr 191.81 1.99 1.04 381.61 6.88 1.80 73.28 1.12 1.54 259.03 2.77 1.07
Co 46.31 2.59 5.59 44.88 1.47 3.28 50.78 1.05 2.07 44.27 1.71 3.85
Ni 83.85 3.53 4.21 116.43 2.40 2.06 45.50 1.53 3.35 88.12 3.27 3.71
Cu 67.50 1.07 1.58 75.35 1.14 1.51 52.73 1.44 2.73 74.32 1.07 1.44
Zn 78.57 2.00 2.54 74.30 3.86 5.20 99.29 3.38 3.41 82.75 1.41 1.71

Notes: Relative standard deviation (RSD) is calculated as the standard deviation of N analyses divided by the average value. BDL = below detection limit, — = not applicable.

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