Environmental Engineering Reference
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Fig. 11
The ratio of
P1
/
P0
for different sources. See Fig.
9
for the symbols and to the text for
explanation
distributions, and so other methylphenanthrenic indices (MPIs) such as the
3
2131
9111
=
−+−
−+−
P
P
MPI
are frequently used to distinguish between coals or oils of
P
P
different thermal maturity (Achten and Hofmann
2009
; Boehm et al.
2001
; Dzou
et al.
1995
; Lehndorff and Schwark
2009
; Radke et al.
1982
; Stout and Emsbo-
Mattingly
2008
; Wang and Brown
2009
).
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