Table T4.

Table T4. X-ray fluorescence major element analytical accuracy and precision.

	Date (Dec 1999)	_{Major element (wt%)}
Run	Date (Dec 1999)	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	Total
AII-92
Compilation value*		50.00	1.75	15.49	10.85	0.18	7.41	11.16	3.07	0.17	0.16	100.24
1	6	49.01	1.71	15.44	10.77	0.17	7.31	10.89	3.14	0.17	0.17	98.78
2	7	49.51	1.77	15.58	10.80	0.18	7.33	10.94	3.13	0.18	0.17	99.59
3	7	49.30	1.79	15.57	10.82	0.18	7.31	10.90	3.11	0.18	0.17	99.33
4	8	49.21	1.69	15.50	10.82	0.17	7.32	10.95	3.15	0.17	0.17	99.15
5	9	49.42	1.75	15.63	10.83	0.17	7.38	10.91	3.15	0.18	0.17	99.59
7	13	49.05	1.74	15.62	10.78	0.17	7.28	10.89	3.14	0.18	0.18	99.03
8	13	49.32	1.77	15.66	10.80	0.18	7.34	10.92	3.15	0.18	0.17	99.49
9	13	49.13	1.75	15.63	10.73	0.17	7.36	10.91	3.17	0.18	0.17	99.20
10	16	49.24	1.84	15.75	10.79	0.19	7.34	10.88	3.06	0.19	0.17	99.45
11	17	49.23	1.75	15.45	10.81	0.18	7.30	10.88	3.24	0.18	0.17	99.19
13	20	48.99	1.76	15.49	10.85	0.17	7.30	10.89	3.15	0.18	0.17	98.95
15	28	50.02	1.68	15.04	10.37	0.16	7.28	10.92	3.40	0.18	0.18	99.23
16	28	50.31	1.74	15.16	10.37	0.17	7.42	10.98	3.40	0.19	0.18	99.92
17	29	50.67	1.72	15.20	10.48	0.17	7.45	11.07	3.38	0.18	0.18	100.50
18	29	50.43	1.72	15.22	10.44	0.17	7.45	11.07	3.44	0.18	0.18	100.30
19	29	50.67	1.74	15.16	10.49	0.17	7.46	11.09	3.43	0.18	0.18	100.57
20	29	50.89	1.73	15.11	10.47	0.17	7.44	11.09	3.40	0.18	0.18	100.66
20	29	50.67	1.68	15.06	10.48	0.17	7.43	11.07	3.39	0.18	0.18	100.31
	Average:	49.73	1.74	15.40	10.66	0.17	7.36	10.96	3.25	0.18	0.17
	1 SD:	0.69	0.04	0.24	0.18	0.01	0.06	0.08	0.14	0.00	0.01
	%RSD:	1.38	2.27	1.53	1.72	3.87	0.87	0.73	4.18	2.69	2.93
MRG-1
Recommended value**		39.12	3.77	8.47	17.94	0.17	13.55	14.70	0.74	0.18	0.08	98.72
1	6	39.61	3.79	8.79	17.94	0.17	13.63	14.90	0.64	0.20	0.06	99.73
2	7	39.88	3.84	8.82	17.95	0.18	13.62	14.90	0.70	0.20	0.07	100.16
3	7	39.69	3.86	8.81	17.95	0.18	13.64	14.88	0.75	0.20	0.06	100.02
4	8	39.52	3.73	8.66	18.01	0.17	13.60	14.92	0.70	0.19	0.06	99.56
5	9	39.66	3.84	8.83	18.00	0.17	13.62	14.90	0.71	0.20	0.07	100.00
7	13	39.60	3.83	8.78	17.97	0.17	13.63	14.86	0.69	0.20	0.07	99.80
8	13	39.69	3.86	8.85	17.93	0.18	13.70	14.88	0.68	0.20	0.06	100.03
9	13	39.56	3.79	8.78	17.90	0.17	13.63	14.90	0.77	0.20	0.07	99.77
10	18	39.43	3.83	8.73	18.04	0.17	13.61	14.89	0.80	0.20	0.07	99.77
11	18	39.34	3.77	8.63	18.05	0.17	13.57	14.91	0.72	0.19	0.07	99.42
12	19	39.13	3.71	8.45	18.07	0.16	13.56	14.88	0.75	0.18	0.07	98.96
13	20	39.36	3.84	8.74	18.05	0.17	13.63	14.88	0.69	0.20	0.07	99.63
	Average:	39.54	3.81	8.74	17.99	0.17	13.62	14.89	0.72	0.20	0.07
	1 SD:	0.20	0.05	0.11	0.06	0.01	0.04	0.02	0.04	0.01	0.00
	%RSD:	0.50	1.31	1.29	0.31	3.36	0.26	0.11	6.14	3.31	7.39

Notes: * = Precision has been estimated from means (in weight percent) and from standard deviations (SD) of replicate analyses of the reference standard MRG-1 and the internal standard AII-92. ** = Govindaraju (1994). RSD = relative standard deviation. This table is also available in ASCII format.