12.
Transfer
the paper to a 100 ml platinum dish.
GOO°C tO oxidize all carboncous
ma~cria~s.
Dry at 11 O°C and ignite
at
13. Coolthedish. Add 25 ml of1-1N03
mld 10 ml ofIIFtolhcrcsiclue
and evaporate
todryness.
14.
Repeat
the addition
and evaporation
15. Add 25 ml of}IN03and 5 ml of IIC104.Evaporatetodryness. Dissolvethe
residuein1:11-lNO~
and combinewi[hthemain solution
reservedforplutonium
determill,ation.
16,
17.
Evaporate the solution to about 100 ml. Cool to room tcmpcraturc,
transfer
a 250 ml graduated cylinder ancl record the volume.
Rcscrvc Lhc bcalmr.
Dispense
two 100 microliter
aliquots
to two 150 ml beakers
containing
to
25 ml of
deionized
water. Aclcl
2-3dropsof0.5r\)
]]l~ci~c}lpl]tllalci]l.
‘1’i~ralc
the
two
aliquots
with stzmdardizcd
0.1 N to a pllcl~oll]l]tllalcill
cncl point.
Calculate
the
acidnormalityofthesample solution.
18,
Transfer
the sample from the graduated cylinder to original beaker reserved
in
step 16. Wash the graduated cylinder with the amount of water necessary
to
ofthe sample solution to 8& HN03.
adjust the normality
19.
Continue
-— .----- —.. --—.- ...
the analysis
from ION EXC J 1A NGE SJ41’ARATION,
in
l~roccclurc
E- Pu-07.