Initial Reports, Volume 206
Ms 206IR-102
Chapter 2, Table T11. Sediment chemistry analyses and corresponding reproducibility.

Note: Major element oxides are reported as weight percent and trace elements as parts per million. SCO-1 = Cody Shale, a silty shale sediment standard. BDL = below detection limit. ICP-AES = inductively coupled plasma-atomic emission spectroscopy. n = number of analyses.

Parameter 	Method	SCO-1 value accepted	SCO-1 value measured	 1 sigma (%)	n

Nitrogen 	Gas chromatography			5.8	6
Carbon	Gas chromatography			1.5	6
Hydrogen	Gas chromatography			5.3	6
Sulfur	Gas chromatography			BDL	
%CaCO3	Coulometry			1.1	5
SiO2 	ICP-AES	62.78 +/- 0.66	64.68	3.4	6
Al2O3 	ICP-AES	13.67 +/- 0.21	13.58	5	6
TiO2 	ICP-AES	0.63 +/- 0.06	0.61	5.8	6
Fe2O3T 	ICP-AES	5.13 +/- 0.18	5.03	7.1	6
MnO 	ICP-AES	0.05 +/- 0.003	0.05	2.9	6
CaO 	ICP-AES	2.62 +/- 0.20	2.52	1.5	6
MgO 	ICP-AES	2.72 +/- 0.18 	2.73	3.9	6
Na2O 	ICP-AES	0.90 +/- 0.06 	0.92	>20	6
K2O 	ICP-AES	2.77 +/- 0.08	2.76	>20	6
Sr 	ICP-AES	170 +/- 16	168	2.7	6
Ba 	ICP-AES	570 +/- 30	578	6.9	6
Cr 	ICP-AES	68 +/- 5 	65	>20	6
Ni 	ICP-AES	27 +/- 4 	25	13.1	6
V 	ICP-AES	131	129	10.2	6
Y 	ICP-AES	26 +/- 4 	29	8.5	6