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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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