Seay
that “38py 3g
a>
ta
Mee pLUTONIUMIN SEA WATERS, ETC.
tad
| M. WONG
E dis-s. A plutonium-236 source electroplated on a stutniess steel disc and used as a
detector standard over a period of 32 months showed Joss of neither activity (othe
than its normal decay} nor resolution.
red with by
> being very
Adsorption floss of plutonium on several laboratory wares was also checked.
is. Radium.
nium in the
| E. Known amounts of plutonium-236 standard were evaporated in Pyrex beakers, Teflon
e beakers, ceramic and Vycor crucibles with hydrochloric—nitric acid mixtures: the
B standard was then transferred to an electroplating apparatus, electroplated and
F counted. No significant difference was found in these standards from one that was
ete
yg
y
soar heend “oe Oe
Caan
“wal
.
2
: directly electroplated.
The author ts very grateful to Dr. V. T. Bowen for his advice and encouragement. This work was supported by the U.S. Atomic Energy Commission under
> contract AT (30-!}-2174. Contribution No. 2712 from the Woods Hole Oceanographic
- Institution,
" igTASIESIN me op
PranaBag,
" SUMMARY
sample} and 0.002 d.p.m. per kg of marine organisms (1-kg sample). An iron(IQ)
sediments and ashed organisms. Factors influencing the recovery, contamination
and blank activity are discussed.
RESUME
Une méthode radiochimique est décrite pour le dosage du plutonium dans
des échantilons d’eaux de mer, de sédiments et dorganismes marins. avec des
aration of iron
- Sensibilités de 0.004 d.p.m./100 1 (prise d’échantilion 30 1), 0.02 d.p.m./kg (prise de
y hydrochloric
many columnlorium—nitrate
dJrochtoric acid
uilibrated with
100 g}) et 0.002 d.p.m./kg (prise de 1 kg) respectivement. Le plutonium est concentré
par coprécipitation avec lhydroxyde de fer{I1). Un traitement au mélange acide
AS age eg
eee
tneieee
OTe oPRic
ae ed eee 6
so
: Nitrique~acide chlorhydrique est proposé pour sédiments et cendres d’organismes.
’ Divers paramétres sont examinés.
imn plutonium
peue'gaioan
ZUSAMMENFASSUNG
Es wird ein radiochemisches Verfahren beschrieben, mit dem Plutonium in
grossen Proben von Meerwasser. Sedimenten und Organismen mit einer Empfindlichkeit von 0.004 d.p.m./100 1 in Meerwasser (bei einer 50 !-Probe), 0.02 d.p.m./kg
in Sedimenten (100 g-Probe) und 0.002 d.p.m./kg in maritimen Organismen(1 kgProbe) bestimmt werden kann. Fiir die Anreicherung des Plutoniums in Meerwasser
wird eine Eisen(II)-hydroxid-Mitfallungsmethode angewendet. Sedimente und veraschte Organismen werden mit einem Gemisch von Salpeter- und Salzsaure ausge-
zogen. Die Faktoren. die den erfassten Antei). die Kontamination und Blindaktivitat
;
bezinflussen. werden diskutiert.
2
re
he
»
‘
seteak Liat
thaw
.
a
tad
"red ey i” Ppa
B ai rait
pi ny wee,
Mel
oe
reas thorium Is
ission of 7°° Puls
eVfor platinum
per 100 1 of sea water (for a 50-] sample}, 0.02 d.p.m. per kg of sediments ({100-g
hydroxide coprecipitation methodis used for the concentration of plutonium in sea
water. A mitric-hydrochloric acid leaching method is adapted for the treatment of
recipitates and
d for the mountbecause they are
‘d sample is not
x-resolution and
A radiochemical procedureis described for the determination of plutonium in
large samples of sea water, sediments and organisms with a sensitivity of 0.004 d.p.m.
a
900428
Anal. Chim. Acta, 36 (1971) 355-364