The Chemical Analysis of Argonne Premium Coal Samples
Edited by Curtis A. Palmer
U.S. Geological Survey Bulletin 2144
Determination of 33 Elements in Coal Ash from 8 Argonne Premium Coal Samples by Inductively Coupled Argon Plasma-Mass Spectrometry
By Allen L. Meier
Table 5. Comparison of reference values with mean concentrations of rare earth and other elements determined by 22 replicated ICAP-MS analyses of NIST standard reference material 1632b (coal) that was ashed and dissolved by the sinter method.
[All concentrations are in parts per million (ppm). The reference values for NIST standard reference material 1632b (coal) are from National Bureau of Standards (1985). ICAP-MS, inductively coupled argon plasma-mass spectrometry; NIST, National Institute of Standards and Technology, formerly the National Bureau of Standards; RSD, relative standard deviation (in percent); STD, standard deviation (in parts per million); --, no data]
| Element | Ref. value (ppm) |
This study | ||
| Mean (ppm) |
STD (ppm) |
RSD (%) |
||
| La | 75.0 | 64.3 | 3.11 | 4.8 |
| Ce | 132.4 | 124.6 | 7.18 | 5.8 |
| Pr | -- | 13.6 | .73 | 5.4 |
| Nd | -- | 53.2 | 2.98 | 5.6 |
| Sm | 12.8 | 10.9 | .65 | 6.0 |
| Eu | 2.5 | 2.5 | .19 | 7.5 |
| Gd | -- | 10.2 | .84 | 8.3 |
| Tb | -- | 1.5 | .11 | 7.0 |
| Dy | -- | 9.4 | .57 | 6.1 |
| Ho | -- | 1.7 | .11 | 6.4 |
| Er | -- | 5.3 | .36 | 6.8 |
| Tm | -- | .8 | .07 | 8.6 |
| Yb | -- | 5.0 | .37 | 7.5 |
| Hf | 6.3 | 6.8 | .55 | 8.1 |
| Ta | -- | 2.0 | .24 | 12.1 |
| W | 7.1 | 6.8 | .51 | 7.5 |
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