The Chemical Analysis of Argonne Premium Coal Samples
Edited by Curtis A. Palmer
1997
U.S. Geological Survey Bulletin 2144
Compilation of Multitechnique Determinations of 51 Elements in 8 Argonne Premium Coal Samples
By Curtis A. Palmer and Sarah A. Klizas
Table 3. Agreement between techniques for major elements using data from table 1 and criteria described in text.
[The following abbreviations were used under Exceptions: Samples: 1 = UF PC-1; 2 = WY PC-2; 3 = IL PC-3; 4 = PITT PC-4; 5 = POC PC-5; 6 = UT PC-6; 7 = WV PC-7; 8 = ND PC-8. Those that differ from the overall agreement are followed by g = good agreement; u = usable agreement; p = poor agreement; or x = no values or only upper limits found. High-precision (HP) techniques are in bold for consistency with other tables. HP values not used to calculate the mean are identified with an s for values with only one significant figure, f for values rejected because of the 40 percent rule (see text), or an o for single values rejected using the Grubbs outlier test (Taylor, 1987). All values including outliers were used to determine overall agreement. The mean of these values was used for comparison in evaluating low-precision values. Sample numbers in parentheses are samples where only single determinations are available. Agreement calculated using trace-element criteria because of low concentration in sample was designated with a t. material analyzed: (A) = ash; (C) = whole coal; * = done in Denver]
| Element | Exceptions to major elements |
HP techniques |
Overall agreement |
Exceptions | LP techniques |
Overall agreement |
Exceptions |
| Si | ICAP-AES(A)* | Good | 2u,3o,8= | DCAES(A) | Usable | 3,6,7g;2,4,5p | |
| WDXRF(A) | Good | 2,4,5u,(8)ou | DCAES(C) | Poor | 3sg;1s,4s,5u;6-8x | ||
| Al | WDXRF(A) | Good | (8)ou | DCAES(A) | Poor | 6u | |
| ICAP-AES(A) | Good | (6)u | DCAES(C) | Poor | 1s,3s,4s;6-8x | ||
| ICAP-AES(A)* | Good | 3o,4o,5o | |||||
| Fe | INAA(C) | Good | 6,8u | DCAES(A) | Usable | 5g;2,4,8p | |
| WDXRF(A) | Good | 1,2,4,(8)u | DCAES(C) | Usable | 3s,4s,5p;6-8x;1s | ||
| ICAP-AES(A) | Good | 6u | |||||
| ICAP-AES(A)* | Good | 1,3,4,8u | |||||
| Mg | 1,3-7t | WDXRF(A) | Usable | 1g;(6)p;3s,4s,(7)s | |||
| ICAP-AES(A) | Good | DCAES(A) | Poor | 7g;6u | |||
| ICAP-AES(A)* | Good | 2,8u | DCAES(C) | Usable | 6-8x | ||
| Ca | 7t | WDXRF(A) | Good | (7)s | DCAES(A) | Poor | 2,7,8u |
| ICAP-AES(A) | Good | 1,2u | DCAES(C) | Poor | 2su;6-8x;3s | ||
| ICAP-AES(A)* | Good | 2,4u;6o | |||||
| Na | 1,4,5,7t | INAA(C) | Good | 6-8u | DCAES(A) | Usable | 4,7g;3,5,6,(8)p |
| ICAP-AES(A) | Good | 3,5,6,8u | |||||
| ICAP-AES(A)* | Good | 2u | |||||
| WDXRF(A) | Usable | (8)g;(7)sp;1s,4s | |||||
| K | 2,5,6,8t | INAA(C) | Good | 6,8u | DCAES(A) | Usable | 3,7p |
| WDXRF(A) | Good | (6)su;2s,5s,(8)s | |||||
| ICAP-AES(A) | Usable | 1,3,4,7g;8fp | |||||
| ICAP-AES(A)* | Good | 2,3,5,8u | |||||
| Ti | 1-6,8t | WDXRF(A) | Good | (6)su:3s,(8)s | DCAES(A) | Usable | 3,4,8g;7p |
| ICAP-AES(A) | Good | DCAES(C) | Usable | 4,5p;6-8x | |||
| ICAP-AES(A)* | Good | ||||||
| P | 1-8t | WDXRF(A) | Usable | 4sg;(8)sp;1s,2s, 3s,5s;(6)s,(7)s |
|||
| ICAP-AES(A) | Good | 1,4,6u;3,7= | WDXRF(C) | Poor | 4sg;2su;8sp;1,3,5-7x | ||
| ICAP-AES(A)* | Good | 1,4;3s,6su;7s | DCAES(A) | Poor | 8g;7p;1,3-5x | ||
| Mn | 1-8t | WDXRF(A) | Usable | 1-7x,8sg | DCAES(A) | Usable | 2,3,4,6p |
| ICAP-AES(A) | Good | DCAES(C) | Usable | 4g;3p;6-8x | |||
| ICAP-AES(A)* | Good | ||||||
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