
392 Nuclear Forensic Analysis
their mass-spectral data to those in reliable libraries. Of course, quantitative analyses
b
y
G
C–MS
a
re
a
lso
p
ossible.
T
hey
r
equire
a
k
nown
a
nalytic
r
eference
m
aterial
a
nd
t
he
me
asurement
o
f
G
C
r
etention
t
ime
a
nd
(
at
l
east)
t
hree
d
ominant
M
S
i
ons
f
or
e
ach
c
hemical
s
pecies
o
f
i
nterest.
E
mpirical
ca
libration
c
urves
m
ay
t
hen
b
e
d
eter-
mined
b
y
g
ravimetry,
s
erial
d
ilution,
a
nd
t
he
G
C
p
eak
a
reas
f
or
e
ach
c
ompound
t
o
be quantitated. However, as there may be hundreds of signature analytes in a given
N
FA
G
C–MS
p
role,
q
uantitative
ca
librations
f
or
e
ach
s
pecies
i
n
t
hese
s
ituations
a
re generally prohibitive.
An
e
stablished