Chemistry Reference
In-Depth Information
tAbLe 9.2
Fission Product separations in Flow systems: sr and Y
separation
Chemistry
Year
Purpose/Approach
Detection
References
1996
Crown ether
Sr-Resin
90
Sr determination in aged
nuclear waste by SI method
On-line liquid
scintillation
80
1999
Crown ether
Sr-Resin
90
Sr determination by rapid
automated SI formats, nuclear
waste
On-line or off-line
radiometric
detection
47
1999
Crown ether
Sr-Resin
90
Sr separated on-line using
renewable separation column
approach
On-line liquid
scintillation
83
2002
Crown ether
wetting film
90
Sr separation using automated
wetting film instead of column,
spiked environmental samples
Off-line counting
146
2004
Crown ether
Sr-Resin
Sr (stable and radioactive)
separated by multisyringe FI
Off-line, ICP-AES
or counting
121
2000, 2001
Crown ether
90
Sr sensing in water using
column containing polymer
impregnated with both
extractant and scintillating
fluors
Radiometric
column sensor
96,124
2001
Crown ether
Sr-Resin
90
Sr sensing in water using
column containing mixture of
Sr-Resin particles and solid
scintillator particles
Radiometric
column sensor
124
2000
MnO
2
cotton
filter
90
Sr/
90
Y separation by capture of
90
Y on MnO
2
-impregnated
column
Off-line counting
45
2003
MnO
2
cotton
filter
90
Sr determination in
combination with
226
Ra
determination, using MnO
2
-
impregnated column separation
Off-line counting
126
1999
HDEHP
90
Sr/
90
Y sensing in water using
column containing extractant
and scintillating fluors
Radiometric
column sensor
95
2005
HDEHP C18
support
Y (stable and radioactive)
separated by multisyringe FI
Off-line,
ICP-AES, or
counting
123
and the reprocessing of spent nuclear fuels.
99
Tc is a pure β emitter with a specific
activity of 629 Bq/μg; thus, radiometric determination relies on detecting its β par-
ticle emission (β
max
= 294 keV). Its low specific activity also makes it an excellent
candidate for determination by ICP-MS.
Analytical methods normally require separation of
99
Tc from inactive matrix con-
stituents and various interfering radionuclides. These separations can be carried out
