Metrohm IC Net 2.1 - Manual (Page 181)

7.6 Report output
raw concentration Absolute concentrations (raw quantity) of
the components, calculated as
C
i
= W
i
(R
i
) / V'
Total value for the column is the sum of
concentrations for all components.
concentration% Normalization of concentrations for all
peaks using the NORM value entered in
the
Total % for normalization field (default
setting 100%):
C
i
% = NORM • W
i
(R
i
) / ∑ W
i
(R
i
)
Total value for the column equals NORM
for the main table, and the sum of concen-
trations in the group for the group table.
rel. concentration Relative concentration of the component
relative to the standard component, as-
sumes concentration of one of the compo-
nents to be known in advance. The concen-
tration of the component is calculated by
the formula:
C'
i
= W
i
(R
i
) / V' = W
i
(R
i
) • C
s
/ W
s
(R
s
) ,
where V' = W
s
(R
s
) / C
s
is the effective (re-
duced) volume of injected sample. The
standard component concentration C
s
is
entered by the user.
Total value for relative concentration col-
umn does not include the concentration of
the standard component.
rel. concentration% Relative concentration percent differs from
concentration% by exclusion of standard
component(s) from summation, so that
sum of all concentrations (excluding stan-
dard) equals NORM.
Total value for the column equals NORM
value for main peak table, and the sum of
concentrations in the group for Group table.
index Linear or logarithmic retention index for
identified components.
Total value for the column is a weighted in-
dex average with absolute concentration as
weight.
I = ∑ { (I
i
C
i
) / ∑ C
i
} .
IC Net 2.1 173