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 6. Comparison of reference values with mean concentrations of rare earth and other elements determined by 22 replicate ICAP-MS analyses of NIST standard reference material 1633 (coal fly ash) that was dissolved by the sinter method.
[All concentrations are in parts per million (ppm). The reference values for NIST standard reference material 1633 (coal fly ash) are from National Bureau of Standards (1979). 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 | -- | 87.30 | 5.28 | 6.0 |
| Ce | 180.0 | 168.12 | 12.36 | 7.4 |
| Pr | -- | 19.16 | 1.32 | 6.9 |
| Nd | -- | 75.71 | 4.91 | 6.5 |
| Sm | -- | 16.34 | .82 | 5.0 |
| Eu | 4.0 | 3.97 | .22 | 5.7 |
| Gd | -- | 16.16 | 1.52 | 9.4 |
| Tb | -- | 2.51 | .18 | 7.1 |
| Dy | -- | 15.48 | 1.04 | 6.7 |
| Ho | -- | 2.88 | .16 | 5.5 |
| Er | -- | 8.51 | .44 | 5.1 |
| Tm | -- | 1.22 | .08 | 6.7 |
| Yb | -- | 7.65 | .46 | 6.0 |
| Hf | 7.6 | 8.09 | .82 | 10.2 |
| Ta | -- | 2.14 | .19 | 9.0 |
| W | -- | 6.11 | .52 | 8.5 |
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