
166 Nuclear Forensic Analysis
rare earths were isolated, precipitated as oxalates, and red to stoichiometric oxides.
T
he
l
anthanide
c
hemical
y
ields,
d
etermined
f
rom
t
he
w
eights
o
f
t
he
s
amples,
w
ere
a
pplied
t
o
t
he
r
adionuclide
c
oncentrations
d
etermined
b
y
r
adiation
c
ounting
t
o
g
ive
nal ssion yields.
Tracer
a
nd
c
arrier
s
olutions
f
or
n
uclear
f
orensic
a
pplications
m
ust
b
e
p
repared
from high-purity reagents to minimize the addition of interfering analytes to samples
w
ith
c
omplex
m
atrices.
T
he
a
cid
c
oncentration
o
f
a t
racer
s
olution
s
hould
b
e
m
ain-
tained
f
airly
h
igh
(
≥2
M
)
t
o
p
revent
l
osses
t
o
t
he
w
alls
o
f
t
he
v
essel
i
n
w
hich
t
he
t
racer ...