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Table T3. Check-standard data for ICP-AES analyses, Expedition 336.

Element BAS-140 MRG-1
Mean
(N = 8)
RSD %
(1σ)
Published Mean
(N = 8)
RSD %
(1σ)
Published
Major (wt%):
SiO2 50.81 0.7 50.5 38.9 0.7 39.6
TiO2 0.984 0.5 0.98 3.83 0.9 3.82
Al2O3 14.5 0.5 14.6 8.66 0.6 8.57
Fe2O3T 11.0 0.8 11.1 18.0 1.1 18.2
MnO ND   0.19 ND    
MgO 8.21 1.0 8.15 13.4 0.7 13.7
CaO 12.4 0.5 12.4 14.7 0.8 14.9
Na2O 1.86 2.1 1.84 0.69 1.6 0.75
K2O 0.02 4.8 0.01 0.17 1.3 0.18
P2O5 0.08 18.9 0.08 0.09 18.5 0.08
Trace (ppm):
Ba 3.0 20.0 2* 55.3 3.0  
Sr 31.9 8.5 44 275 2.3 270
Zr 48.3 3.0 49* 111 2.8 109
Y 27.5 2.9 24 13.5 4.1 14.2
V 335 0.7 333* 523 1.1 533
Sc 45.2 0.8 43 54.6 0.4 55.7
Cu 85.3 1.5 81 130 2.1 136
Zn 65.3 2.3 80 191 0.5 194
Co 49.4 1.4 55 88.0 2.3 88.1
Cr 185 1.2 186 445 0.5 436
Ni 82.5 2.8 85 191 3.4 196

* = values reported by Expedition 309/312 Shipboard Scientific Party (2006). † = values calculated based on N = 4. ICP-AES = inductively coupled plasma–atomic emission spectroscopy. BAS-140 = values published by Sparks and Zuleger (1995). MRG-1 = values published by Govindaraju (1989). RSD = run-to-run relative standard deviation. Uncertainties are listed as RSD% (1σ). Fe2O3T = total iron calculated as ferric oxide. ND = not determined. BAS-140 is a laboratory standard.

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