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

By Vernon E. Swanson and Claude Huffman, Jr.

U.S. GEOLOGICAL SURVEY CIRCULAR 735
1976

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
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