Table 1. UCSC XRF Precision and Accuracy, 2004

8/23/04				STANDARDS RUN AS UNKNOWNS BY XRF AT UCSC

	AGV-1G			G-2F			RGM-1E			STM-1E
	As Unk	Consens.		As Unk	Consens.		As Unk	Consens.		As Unk	Consens.
SiO2	60.42	58.84		69.40	69.14		74.00	73.45		59.77	59.64
TiO2	1.07	1.05		0.487	0.48		0.271	0.267		0.144	0.135
Al2O3	17.65	17.15		15.22	15.39		13.93	13.72		18.34	18.39
FeO_T	6.09	6.09		2.34	2.39		1.68	1.67		4.81	4.70
MnO	0.094	0.09		0.032	0.03		0.037	0.036		0.221	0.22
MgO	1.57	1.53		0.800	0.75		0.350	0.275		0.182	0.101
CaO	5.02	4.94		1.93	1.96		1.21	1.15		1.18	1.09
Na2O	4.23	4.26		4.10	4.08		4.04	4.07		9.10	8.94
K2O	3.10	2.92		4.73	4.48		4.53	4.30		4.53	4.28
P2O5	0.494	0.49		0.138	0.14		0.050	0.048		0.171	0.158
LOI		1.2
Total	99.74	98.56		99.18	98.84		100.10	98.99		98.45	97.65


	BIR-1D			DNC-1B			W-2D			BCR-2B
	As Unk	Consens.		As Unk	Consens.		As Unk	Consens.		As Unk	Consens.
SiO2	48.11	47.77		46.78	47.04		54.13	52.44		53.90	54.1
TiO2	0.960	0.96		0.494	0.48		1.09	1.06		2.30	2.26
Al2O3	15.29	15.35		18.24	18.30		15.49	15.35		13.38	13.5
FeO_T	10.26	10.13		8.94	8.94		9.91	9.66		12.60	12.42
MnO	0.170	0.171		0.147	0.149		0.166	0.163		0.196	0.196
MgO	9.93	9.68		10.53	10.05		6.52	6.37		3.66	3.59
CaO	13.42	13.24		11.46	11.27		10.98	10.87		7.27	7.12
Na2O	1.79	1.75		1.89	1.87		2.25	2.14		3.25	3.16
K2O	0.037	0.027		0.240	0.229		0.638	0.627		1.83	1.79
P2O5	0.029	0.046		0.066	0.085		0.119	0.131		0.350	0.35
LOI					0.6			0.6
Total	100.00	99.13		98.79	99.01		101.29	99.41		98.74	98.48


	BHVO-2A			JA-1B			JA-2A			JB-3B
	As Unk	Consens.		As Unk	Consens.		As Unk	Consens.		As Unk	Consens.
SiO2	49.21	49.9		64.74	64.06		57.36	56.18		51.45	51.04
TiO2	2.75	2.73		0.847	0.87		0.670	0.67		1.43	1.45
Al2O3	13.38	13.5		15.19	14.98		15.53	15.32		17.28	16.89
FeO_T	10.99	11.07		6.33	6.25		5.48	5.52		10.68	10.69
MnO	0.165	0.167		0.152	0.15		0.104	0.11		0.175	0.16
MgO	7.37	7.23		1.57	1.61		7.38	7.68		5.22	5.2
CaO	11.44	11.4		5.78	5.68		6.33	6.48		9.93	9.86
Na2O	2.27	2.22		3.82	3.86		3.06	3.08		2.71	2.82
K2O	0.526	0.52		0.766	0.78		1.86	1.8		0.778	0.78
P2O5	0.281	0.27		0.158	0.16		0.163	0.15		0.295	0.29
LOI
Total	98.38	99.00		99.35	98.40		97.94	96.99		99.95	99.18

Calibration used all consensus values except those in boldface