USGS Circular 735: Table 3.

GUIDELINES FOR SAMPLE COLLECTING AND ANALYTICAL METHODS USED IN THE U.S. GEOLOGICAL SURVEY FOR DETERMINING CHEMICAL COMPOSITION OF COAL

Table 3.--Comparison of USGS analyses with Illinois State Geological Survey analyses

[Col. 1 USGS values (As, Cu, Mn, Pb, Cd, F, Sb, and Zn by wet chemical methods, all others by six-step spectographic method); col. 2, Illinois values]

Major elements (%)
Sample	Ca		Fe		K		Mg		Na		Ti
	1	2	1	2	1	2	1	2	1	2	1	2
15278	0.68	0.82	1.11	1.65	0.18	0.17	0.06	0.05	0.031	0.048	0.05	0.06
16264	.73	.56	2.31	2.05	.17	.15	.05	.04	.040	.051	.04	.05
16408	.10	.23	3.71	3.51	.14	.13	.04	.03	.014	.007	.03	.05
16317	.90	.73	1.35	1.57	.15	.17	.05	.05	.017	.017	.04	.06
15263	.04	.10	2.25	2.65	.11	.14	.04	.04	.013	.014	.05	.05
Trace elements (ppm)
Sample	As		B		Be		Cd		Co		Cr
	1	2	1	2	1	2	1	2	1	2	1	2
15278	3.6	5.6	150		1.5	1.5	0.4	0.3	2	5	10	9
16264	9.5	9.6	150	139	2	3.0	7.0	2.7	1	2	10	16
16408	55	57	30	49	.7	.9	<.3	<.4	7	17	10	7
16317	25	24	100	85	2	2.8	21	28	5	9	20	26
15263	79	73	150		2	3.0	4.4	3.8	5	11	7	7
Trace elements (ppm) continued
Sample	Cu		F		Ga		Ge		Hg		Mn
	1	2	1	2	1	2	1	2	1	2	1	2
15278	6	8	60	60	3	2.4	15	9	0.80	0.39	100	78
16264	9	10	64	69	3	4.3	20	15	.32	.24	70	81
16408	13	16	91	83	2	2.7	< 3	2	.29	.30	15	13
16317	14	20	53	52	3	4.7	20	12	.18	.10	150	67
15263	32	44	55	41	5	3.5	20	22	.28	.22	7	12
Trace elements (ppm) continued
Sample	Mo		Ni		Pb		Sb		V		Zn
	1	2	1	2	1	2	1	2	1	2	1	2
15278	1	5	5	8	5	9	0.4	0.2	15	27	162	137
16264	< 1	5	7	22	57	51	.7	.8	10	22	305	159
16408	1	6	10	26	44	40	.5	2.0	15	31	24	26
16317	5	9	20	30	66	72	2.9	4.3	30	32	2,420	2,668
15263	1	2	50	40	76	96	5.4	5.7	20	23	340	425