SCIENTIFIC ABSTRACT SHVEDOV, V.P. - SHVEDOVA, N.S.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001550410004-1
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: March 14, 2001
• Sequence Number: 4
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

24089
S/*, a6/6O/0O2/,:)or_,/o1 4/(Y26
ThB applieatlon of .... A051/A129
(Sr* Ba)") i~~ _--Y aJJ~nc `5 ml Of f uraing HN03
I ~ I t. _.- ~ :~ _- - 1 (98 ~6) whil-t sooied on
ice for 1.5 !r_'1-i,,7,-,z_ .,,n1A _-r..`?_~ntz. lh~! Pz/NO,)2 solution is dis-mcive-d In 1 irl of H20
and a ,_F-P_~rformred. Th,~. sobiticns 2f.,)n-
taining Thz~ of '0X1, oth"r separation fragment-s and
(Nr;., ) *vhporE,_-,-,1 -~.- 2 x1,. 4f,4..zr mi-,Ang with water up ts 15 rr.1, 20 -mg of
TJO2 ;, 2 ar-,- ~
Zr-earrler are ln7,nojl.i~a=~z int~~ ~2o-,.U~tion and the pre.~_ipita~tlon of CeF-3 is
carried out a After washing the fl..icrlde~s w1th water
they a~-e dis~:oived In. a o- H 3 6 mi o f 3. 2 gr of KBr03 is added
to the M, 3
aino:~d SC-11A~Acr; ft
obt- fy Ce!W11) to Ce- mg FjIII -carrier iz
ac L1.1 1-8 t
added and precipitation 1;t.`Xj ) is -_,arried out with 15 17 'M1 of 0-35 'P
H,03' wLt'!-e c!"'L'
x or 10 minutes. T-M- sclution containing
.,nS
RAM), the sum of the raze earsh fragments., K+, 10~, BrO:t' is heated and a care-
flil precipitation of Felk.011)3 is C._X~ried out with concentrated NH40H. The Fe(OH) 3
residue containing -the rar.:~_Aarl.h elemsznts is- washed twice with hot water and dis-
591ved in 4 ml- of cone -r,-,rated FC--".; after which Fe(III) is removed with a four-
-fold extractior-t of th~~: ir-=-cnAoride~ ~~omplex In amylacetate. 'The experimentally
Card 2/~,

24089
5/186/6eo/oo2/oc6/oI4/026
The application of continuous ..... A051/AI29
d6termined:yield of the rare earth fragments waz found to be 60 %. The time
required for the radiochemical separat tion of th-2)rare earth fragments without
a carrier was 2.5 hours. The addition of Fe(III before 'the precipitation of
Ce(I03) reduce' the losses. The possibility of using the extraction of iron
diethyloarbamate into ether from 0.1 n HCl for removal of the iron in the last
staged was investigated and was found to be unsuitable, since products of 'the
thermal, decomposition of diethyldithiocarbamate remained behind. The electro-
phoretIc separation of the rare earth sum fragments and the apparatus used for
t,he Drocedure shovn in Figure I are described. The apparatus is being recon-
structed.at present in order to decrease the time of the separation of the sum
of the rare earth fragments. The final yield of the rare earth fragments with-
out a carrier.in radiochemical and subsequent electrophoretic separation w K 4
determined by means of Y90 (T = 64.3 hours), pml47(T= 2.65 years) and Eu15 15
(T = 16 years), and.was found to be about 45 - 50 %. There are 3 figures and
8 references: 7 Soviet-bloc and 1 non-Soviet-bloc. The reference to the English
language publication reads as follows: K. E. Ballou, Radiochemical Studies: The
Fission Product, 9, 3, 3o6, 1951.
SUBMITTED july 6, 1s59.
Card 3-/t

AUTHORS:
TITLE.
PERIODICAL:
21LO90
S/186/60/002/006/015/026
A051/A129
Shvedov, V. P.; Fu I-Bey
Separation of radioactlve isotopes on a mercury cathode
IV. A study of the Pm147 separation
Radiokhimiya, v. 2, no. 6, ig6o, 715 - 719
TEXT: The authors attempted to find the optimum conditions for the
separation of Pm 147 using various additives &-nd adding lithium carbonate to the
electrolyte. Experiments using tartaric, succin~c, citric and lactic acids were
conducted to establish the best additive for pm147 separation by the electrolysis
method. The action of the acidity of the medium on Pgi147 was Investigated at a
constant concentration of the additives of 1-33 - 10-0 M. The results obtained
show the optimum concentrations of the additives and the pH of the medium for the
given additive. The experimental conditions were as follows: vol".&ge in the bath
9 v, current density on the cathode 4.2 ma/cm2, temperature 300c, quantity of
mercury 177 9, volume of the investl ated solution 10 ml, pH of the medium 7.0,
concentration of lactic acid 4 - 10-1 M, duration of the experiment 30 minutes.
Card 1/2

24090
S/186/60/002/006/015/026
Separation of radioactive isotopes on ~.... A051/A129
An increase in the current density on the cathode raises the Pm147 yield. Purther
studies were made of thR,medium's temperature values in the separation of PmI47.
It Is seen that the Pml yield at a temperature of 400c and over Increases some-
what. This behavio is explained by the change of the stability of amalgam with
temperature by the instability constant of the complexes and the diffusXon value
of the ions of mercury in the solution. Optimum conditions for the PmI47 separa-
tion were found to be: cu,~rent density 5 ma/cm2, temperature of the medium 700C,
volume of solution 10 ml, pH of the medium 7, concentration of Li2CO3 4.5 -lo-3 m.
It was established that the best yield is obtained with lactic acid, and a somewhat
lower yield with citric and tartaric acids. With lactic acid as the additive 99 %
of PmI47 was deposited. There are 7 tables, 2 figures and 4 references: 3 Soviet-
-bloc and I non-Soviet-bloc. The reference to the English language publication
reads as follows: J. Marinsky, Z. Glendenin a. C. Coryell, J. Am. Chem. Soc., 69
11, 2781, 1947.
SUBMITTED: September 12, 1959.
Card 2/2

Ift 24091
3/186/60/002/006/016/026
CQ A 4'.2 C 0 A051/A129
AUTHORS: Shvedov, V. P.; Fu I-Bey
TITLE.- Radioactive isotopes separation on a mercury cathode
V. A study of Nb95 deposition without a carrier
PERIODICAL: Radlokhimiya, v. 2, no. 6, ig6o, 72o - 722
TM: The authors conducted eAperiments in the laboratory as a preli-
minary check of the electrolysis )f sulfuric and hydrofluoric solutions containing
niobium on a mercury cathode. No niobium deposit was noted within a wide range
of the acidity of the medium from PH - 2 to 5 n of H2SO4 at a current of 0.5 to
5 a and electrolysIs duratJon of 2 1/2 hours. The experiments conducted subse-
qu,--ntly showed that. the elenatrolysis of a hydrofluoric solution did not produce
1~6 nicbium deposit. An -attempt was made to produce niobium on a mercury cathode
from solutions of organic compound salts. The experime;ital method used was des-
cribed by Sh~.,edov (Ref. 6: V. F. Shvedov, Fu I-Bey, Radiokhimiya, 2, 1, 57, 1960)
and the experimental conditions used weret current density 4~.2 ma/o;2, quantity
of mercury taken as the cathole 177 9, temperature 300C, volume of the Investigat-
ed solution 10 ml, PH of the medium 7.0. duration of experiment 30 min. Mb was
C&rd 1/ 2

24092
s/186/6o/bo2/oo6/oi7/026
A051/A129
AUTHORS: Shvedov, V. P.; Musayevs Sh. A.
TITLE: A study-of the separation of La 14o -Ya9l, La140_pm147 and
Sr9O-Y9Q mixtures on a tri-valent cerium iodate precipitate.
PERIODICAL, Radiokhimiya, v. 2, no. 6, 196o, 723 - 7127
TEXT- A study was made of the copreoipitation of La140, pM147, y91 &Md
Sr9O + Y90 onla cerium iodate precipitate in the absence of trilon B, based on
the theories of the three types of "homogeneous precipitation". The three differ-
ent cases are given as: 1) "homogeneous precipitation" with gradual reduction of
the solution acidity in the presence of an excess of the precipitating agent; 2)
"homogeneous precipitation" with the appearance of precipitating Ions in the so-
lution; 3) "homogeneous precipitation"llith grgdual decomposition of the complex
compounds. The complete capture of La 0, Pml'47 and Y91 in a saturated solution
of KI03 led to the assLm4tion that not only La3+, and Pm3+, but also Y3+ do not
form soluble anion 0ouiplexes with KIO A study of the solubility of lanthanum
and yttrium isdates at various concentrations of KI03 up to saturation showed that
Card 1/~

24092
8/186/60/oO2/006/017/oc-6
A study of the separation of A051/A129
no noticeable soluble complex compounds of La3+, Y3+ with KIO 3 are formed under
the given condltLons~ The following equilibrium is derived:
3+ 4-
La EDTAI La + [=A]
where [EDrA] 4- is the anion part of trilon B. The experime-t was carried out under
the following conditions 0.40 ml of a buffer solution (8 ml of 98 % acetic acid
Plus 7.2 ml of 2.25 n NaOH plus 0.8 ml water) was added to 2.2 ml of trilon B
(20 mg of trilon B, pH = 8.0) u-itaining the corresponding radioactive isotope.,
the obtained solution was mixed and left to stand for 10 minutes. Then 17.4 ml
of a saturated solution of K103 was added while mixing and the solution was left
to stand again for about 10 minutes, after which 150 mg of crystallized KIO was
added. After mixing for 30 minutes, a fresh precipitate of cerium iodate Pil)
was introduced, containing 5 mg of Ce3+; there Is complete capture of La14 , pml47,
Y9q.And Sr9O by iodate precipitate of trivalent cerium in the saturated solution
of KI03 . Thus, it was shown experimentally that with the gradual decomposition
of the cerium comnlex compound with trilon B in the prese4ce of XTO 3 conditions
are created for the "homogeneoua precipitation" of ce(III) iodate and for the se-
Card 2/3

24092
s/186/6o/oo2/0o6/017/026
A study of the separation of .... A051/A129
paration of La14O-yql and Sr9PY90 mixtures on this precipitate. There are 6
figures, 1 table and 21 references: 5 Soviet-bloc,and 16 non-Soviet-bloc. The
references to the four most recent English language publications read as follows:
A. M. Feibusch, K. Rowley a. L. Gordon, Anal. Chem., 30, 10, 103, 1958; J. A.
Hermann, Ch. A., 52, 10, 7921, 1958; L. Gordon a. L. Ginsburg, Anal. Chem., 29,
1, 38, 1957; L. Gordon, K. Rowley, Anal. Chem..' 29, 1, 34, 1957-
SUBMITTED: December 18, 1959.
Card 3/3

SHVEDOV V P ; YAKOVLEVA, G.V.; ZHILKIN.4,M.I.
Dose of external '(-radiation from radioactive fallout in 1959.
-tom.eaerg. 9 no.4:323-324 0 16o. (MIRA 13:9)
Or;amma rays) (Radioactive fallout)

7 0 0
77741
SOV/755-15-1-3/29
AUTHORS: V. P., Ten 'Pen, Stepanov, A. V.
Slivedov
,
TI'PLE: of Some Inotoi)c:, by Pocusing
Ion 11,,tfy~e
PERIODICAL: Zhur-rial analitiches1coy khimil, 1960, Vol 15,
Pp
ABSTRACT: Applicatlon of focusin,,-r ion-exchati.ge method to the
90 90
t
s, such as Sr -Y
eparation of fIssion pi-oduc

1110
i ~,l 1112L
1pron
as
Ce I "a without carr
,
,
well as Gf the Ce-Pr, ~,-.-,a3 studied. Descriptial
of the method 13 (,,iven In a s;eries of articles
w-flull's-hed p-e-,,Iously (Kolin, A., Proc. Nat. Acad.
I-'13A, 1, 101 , 19' 55, an d 0 t he -'I A diagrarn
of' the im.-t'allation Is shown in Fig. 3. A few drops
of the radlloz~--~tive solution containing the isotopes
11o he clep~xated are olaceJ -~-n a s'rip of lter
papel-- (,with pencil lines 2-:_i mm apart); the ends
C of the stu-In are (dipped into the electrode vessels

ion of L;o"I"'2
Ion -ExchanE-,e S 0'47'75: - 1 -1 - 3 /2 9
Sclieflie of'
separ-atimy iris tallIL 101's
a ~ lfne,"(b) vectiCier,
c ejectj~onic .9tnhIll~,er,
d car,bon elecurode, (e)
ion sepat,ation zotle,
f, ~ nnodic -.301-Litioll 01cl),
C; c,.-Ltho([lc ;olut-Lon
comple.x Coi,mlniL compound),
h) paper str-ip.
l
C'
T
b
M&
/Ck
AT~ /M /9

Separation of' S)oririe I:~0110~,)c.-:; 1):r J~oC.U-,jj-)Lr 77741
Ion-Exchange SOV/75-15-1--3/29
an~i the ceritval pavt of the paper is immersed into
Mj, in tile centi-al container. Now the current
(260-280 v (20--50 v/cm) Is switched on. After
2-~ m1nuteo the concentration gradient Is established,
and after '2--5 minutes the elements are separated and
concentrated. Position of the zones Is found by
direct measurement oC radioactivity of'the paper
strip or by autora(liographic method (autoradlographs
are --iven) Identification of the elements is done
b- the maximum radiation or according
ti f . P
o the h1ali' lite periods Conditions of the experi-
met-It.", and the re2uLt.,; are shown in Tables I and 2.
The follo,,-iiri[~, con,-- luo ions were made: mixtuwo~s
S v9 0-~- Ygo SP go + Ygo + Ce 144 ; and Ce 144 + La 140
C --ffll be b~r the above method, using
III oL, (-itric acidl, in Minutes The
001.
nplete sepava-tion of a miixtu~re of Ce an-1 Pr
In r1o,,-,,:entL-atjonL, I'l
to rj,'f/tril :~anr-iol~.e
VeUC-ho-i when CoMpiexon III is used. Better results
Cavd 51f ave obtalne~-,. by bhe use of a mixture of

Vo L
J
SOV/75-15-1-3/29
ASSOCIATION:
SUBMITTED:
conipl,~xon III -tnd c1tric a (--I d .There are 2
tabled;; 7 and 9 reference3, 5 U.S.,
3 S w Iss , I IS o v le~ t .The 5 U.S. ref'orences are:
Sato T. qi._, Diamon(.1, H., Norris, Td. P., J. Am.
Chem. Soc., '14, 6154 (1952); Sato, T. R., Norris,
W. 11.1 Strain, H. If., Analyt. Chem., 26, 26)7 (1954);
S~tt,(,)'T. R., Horris, W. F., Strain, H. H., Analyt.
ch'--m. , "', (Y 521 (1955); Kolin, A., Proc. Nat. Acad.
Se] . USA 41, 101 (19-55); Hoch, H, Barr, G. H.,
Science, 122, 94', (1955).
Len:;ovet Institt& of Technology, Leningrad
(Leningradsv.1y tek.hno Log i cheskiy institut imeni
Lensoveta)
J111-'r ~O -8
Card 4 4

BEIYAYEV, L.I.; GEDEOWOV, L.I.; SHVEDOV, V.P.;YUZEFOVICH, A.A.
[Intensive rad-loactive fallout in Sineiz (Crimea) as a result
of the nuclear explosicm &f Feb. 13, 1960 in the Sahara] Inten-
--at3mae radioaktivnoe vypadenie v Sijreize (Krym) v rezultt4ite
iadernogo vzryva v Sakhare 13 fevralia 1960 g. Moskv&-., Goo.
Kor,-t Soveta, Ministrov SSSR po ispolizovaniiu atomnoi energii
1961. 36 p. (MIRA 15:11
(Simeiz-Radioactive fallout)

S/049/61/000/0041/008/008
D257/D306
AUTHO'RS: Shvedov. V.P., and Gedeonov, L.I.
TITLE: A conference on the problems of actinometry. atmos-
pheric optics and nuclear meteorology (Nuc-le'ar Meteo-
rology Section)
PERIODICALg Akademiya nauk 333R, Izvestiya. Seriya geofizicheskaya,
no. 4, 1961, 630 - 632
TEXT: At the end of June 1960 a conference on actinometry. atmos-
pheric optics and nuclear meteorology was convened in Villnyus by
the Institut geologii i geografii AN Litovskoy SSR (Ins-4L-litute of
Geology and Geography, Academy of Sciences4 Lithuanian SSR - re-
ferred to as IGG). NU-clear meteorology was discussed at the plenary
session of the Conference and at sectional sessions: the papers
presented dealt with the work carried out at the IGG at the Insti-
tut prikladnoy geofiziki AN SSSR (Instit-ute of Applied Geophysics,
A~_-ademy of Sciences, SSSR - referred to as IAG) and at the Radiye-
Card 1/5

S/049/61/000/004/008/008
A conference on the problems ... D257/D306
vyy institut im. V.G. Khlopina AN SSSR (Radium Institute im, V,G.
Khiopiri, Academy of Sciences, USSR - referred to as RI). Represen-
taiives of these three institutes took part in the discussion, as
well as workers from the Institut atomnoy energii AN SSSR im. I.V.
Kurchazova (Atomic Energy Institute im. I.V. Kurchatov, Academy of
Sciences, USSR), from the Institut geokhimii i analiti--heskoy khi-
mii AN SSSR im. V.I. Vernadskogo (Institute of Geochemistry and Ana-
lytical Chemistry im. V.I~ Vernq:dskiy, Academy of Sciences, USSR).
from the Glavnoye upravleniye gidrometeorologicheskoy sluzhby SSSR
(Main Administra-tion of the Hydrometeorological Service of the USSR)
and from other organizations. At the plenary session B.I. Styro re-
viewed studies of the atmospheric radioactivity and investigations
of meteorological processes using radioactive substances in the
atmosphere; he also indicated future directions of s-.udies. L.V.
Kirichenko (IAG) reported that the concentration of natural radio-
active substances in the atmosphere decreases exponentially wit-h
hei-ght except at d4scontinuities. The highest concentrations were
found in clouds, fog and amoke which act as colleciors of radioac-
Card 2/1,

S/049/61/000/004/'008/,.'008
A conference on the problems D257/D306
tive particles. V.Yu. Potsyus (IGG) discussed the radioactivity of
Clouds. T.N. Nedvetskayte and B.I. Styro reported daily variations
in the --oncentration of a-emitters in the lowest layers of the at.-
mosphere, L.D. Solodikhina (IAG) dealt with simultaneous measure-
ments of the natural radioactivity of atmospheric precipitation a,
3200 and 2200 m; the differences between the activity of rain water
ai these two levels were used to find the "washing-out" coefficient,
Solodikhina reported also that in 1959 precipitation over dry land
was about four times more active than above the open ocean. LL,
Karol' and S~G. Malakhov reviewed global studies of the radioactive
.Lmpur--ities (inc.Luding Sr90) in the atmosphere and on the earth7s
surface. The radioactive conta~,,mination of -t-he lowest layers of the
atmosphere was discussed also oy V.P. Shvedov, Z~G. Gritchenko and
M.I. Zhilkina (RI). S.G. Malakhov (IAG) reported measurements of
the contamination in the lowest layers of the atmosphere due to nu-
clear weapon tests; it was found that between 1955 and 1959 the
concentration of P-active aerosols in air increased very consi er-
ably and this concentration was used to find the amount of Sr98 in
Card 3/5

Wr S/04 9/6!/'0G0/"004/"008/008
.1 conference on the problems D257/D306
the atmosphere. The mechanism of" self.-purification of the lower
layers of 41--he troposphere was the subject of a paper by V.P.
Sh-edav.. L.I. Gedeoncv,, Z-G. Gritchenko and G.V. Yakovleva2 these
four workers confirmed that atmospheric precipitation is the main
purifl-:~ation process. B.I. Styro, Ch.A. Garbalyauskas, T.N. Nedvets-
kayte, I.S. Tomkus and K.K. ShoDauskas reported measurements of
the atmospheric radioactivity with long decay periods. Ch.A.
Garba"yauskas (IGG) discussed settling of radioactive dusts and
estimated the effective time for reducing the radioactive con'.ami-.
nation in the -Iroposphere to one half its original value. Among pa-
pers on the experimental me,-iiods were those of V~P. Matulyavichus
-.n a multichanne~ device for recording of t-he atmospheric radloac-
ana of V.P. Shvedov. Z.G. Gritchenko, M~I. Zhilkina and G.
Ya-ko-.leva,,who described a technique of continuous measurement
.L ube concenirations of long-lived radioactive substances near
The eart-h's surface, The Conference discussed a-rid approved the
following subjects for future work. Development of a theory of
g_iobal -1-ranspor-I of artificially produoed radioactive substances,
Card 4/5

S/049/61/00''~/004/008/008
'L
A conference on the problems D257//D306
a study of natural conditions of formation of radioactive aerosols
and their behavior under various meteorological conditions, kine-
tics of the Drocesses of contamination and self-purification oE
the troposphere. Appearance of B.I. Styro's book on "The problems
of nuclear meteorology" was noted with approval. It resolved
to convene a conference on nuclear meteorology in 1962 in 1jenin-
grad.
Card 5/5

5/081/62/000/011/024/057
E071/E192
AUTHORS:
TITLE:
Shvedov, V.P., Rosyanov, S.P., and Orlov, Yu.F.
Determination of the products of radiolysis of
triphenylphosphate
PERIODICAL: Referativnyy zhurnal, Khimiya, no.11, 1962,.283,
abstract 11 Zh 350. (Tr. Leningr. tekhnol. in-ta im.
Lensoveta, no-55, 1961, 59-63)-
TEXT: Using ultraviolet spectroscopy and paper chromatograpTry
it was shown thgt radiolysis of crystalline triphenylphosphate (I)
by y-rays of Co 0 (1200 curie) in the presence of air, yields
substances similar to mono- and di-phenylphosphoric acids, as well
as an easily hydrolised substance, the spectrum-of which in
0-05N NaOH has maxima at.235 and 287 m1i. The formation of these
substances is ascribed to the appearance of free radicals on
irradiation of (I). The total yield of phosphorus containing
radiolysis products amounts to 0.77 mole/100 ev of the energy
absorbed at an irradiation dose of 3.5 x 1021-.ev/g, which
indicates a high stability of (1) to y-irradiation in comparison
with that of trialkylphosphates. The ultraviolet spectra of (I)
and its radiolysis products are given.
FAbstractor's note: Com lete translation
p

S/081/62/000/002/014/107
B149/B102
AUTHORS: Shvedov, V, P., Rosyanov, S, P., Semenyuk, E. Ya.
TITLE. Some data on the effect of water on the radiolysis of
phosphoric acid esters
Referativnyy zhurnal. Khimiya, no. 2, 1962, 80, abstract
2B572 (Tr. Lening-r. tekhnol. in-ta im, Lensoveta, no- 557
1961, 64 - 66)
TEXT: The effect of the molecular ratios of trialkyl phosphate (TAP);
water on the yield of phosphorus-containing products (PP) during radiolysis
by the action of Co 6o gamma radiation was studied. The yield of PF
decreased with increasing molar proportions of water in the mixtures both
in the case of tributyl phosphate (TBP) and of triethyl phosphate (TEP).
For mixtures TBP-water the yield deviated considerably from that calculated
by the law of averages. In the case TEP - water this was not observed,
The authors presume that this behavior of the mixtures may be due to the
formation (in the case of TEP) of unstable compounds and also of various
complex compounds of TAP and water. LAbstracter's notee Complete transtatioi,

a
y7 -u~7. a n,;
1'. U:
oC tho
I~J 0- U, Ci~. n
1 Lrl L"-- CD S 0 1
0 A 4 - 4 0.:
_rr C 4
c 3 ~~X - I (D n ~,I! n t -a e e n c. o ne r e c I t a o n s
(I O'n s -I a, ul j y
d u C,:~
c Complete -ran-- ation.
U I noue:

Q-/Gc',11/r')2,/,'00/005/004/112
B I 58//Bl 10
UT H 0'
HS ShveJov, V. P., -trunin, A. V.
TT"L-7-*: Investic-atiDn of coprecipitation of yttrium with cerium
p~-rophosphate
1962, 42, abstract
10 D I C,'~ L Referativnyy zhurnal. 7himiya, no. 5,
5B249 (Tr. Leningr. tekhnol. in-ta im. Lensoveta, no. 55,
1961, 102 - 107)
T'-~-,'.T: Coorecioitation of Y with Ce pyrophosphate is studied both on
prepared Ce pyrophosphate orecipitates and with formation of Ce pyrophosphate
from a solution containing Y. ch equi - .
A study of the rate at whi librium
is established rith the prepared Ce pyrophosphate preciDitate and of the
effect on coDrecioitation of overcharging of the Ce pyrophosphate surface
and of the presence in the solution of impurity ions has shown that
coDrecinitation of Y occurs by way of secondary adsorPtion. The degree of
coOrecipitation of the Ce pyrophosphate increases from 2 to 93',j sith
increase in p.-I from 1 to 4.5 (coprecipitation on prepared pyrophosphate)
anI fror. 10 to 98111 with increase in pH from 1 to 2.5 (coprecipitatuion from
Card 1/2

SIOS11621'000.100510041112
Invest.i.-ation of coprecipitation ... 3158/3110
tD -
solution with Y). At low pH values (- 1.4) temperature does not affect
coprecipitation. increase in pH, the de-gree of coprecipitation
increases with temperature. Increase in Y concentration causes a reduction
in its coprecipitation. Addition of excess Na 4P207 initially increases
poprecipitation, then causes its reduction (complex formation).
lAbstra~terls note; Complete translation.]
Card 2/12

0
AIJTHORS~ Shvedov,
'ITU, The radiochemical
-orith low
33187
s/186/61/003/oo6/007/0'0
E051/E135
V.P.5 Zhilkina, M.I., and Zinov,yeva, VA.
determination of CS137 in samplas
levels of radioactivity
FERIOUlCAL. Radiokhimiya, v.3, no.6, 1961, 732-736
TEXT~ The determination of Cs137 in rain or snow and in
aerosols is made difficult by the -Low level of activity
(10-8 - 8 x io'-7 curies) and by the presence of other elementi
-in,
- d crgan,.c compounds in the samples. By the use of an isotope
Ail, cs137 has been determined a7
, -ition method with added carrier,
!,-)%.r levels. Rain or snow was COI1eCtLd in a large, high walled,
,:,c, r - e la I n -60 f) was evaporated.
tank and one month's sample (30
A!,- t-as filtered and th#-- filters ignited, Cs carrier (10-15 mg)
and -.arriers of Rb, Zr, Ce, Y and Sr ( - 5 mg each.) were added
-o the resadues. The mixture was heated with 20-25 m? of
-:onzentrated HC? in a porcelain dish and mixed thoroughly, then
e,.-apora,ed to dryness and baked at 100-110 OC for one hour t~~
debyd-ate SiO2. This treatment was carried out two or thre= +ima~~
Card 1/:,,

3 31'Aj 7
-the -adiochemical determination,.. 6/186/61/OC3/006/007/OIC)
E051/EI35
'rhe re-,Ldii- was heated with 0-5N Hce and centrifuged. The
!-It ~-n thi-is obta ined contained Cs together with Fe, Al - Ca
~'I- Na, K Co. Cu. Nji, etc. Fe, Ae and rare earth hydroxid-2F
ip--tated. by the addition of 5- 100i~ Nf14OH so lution. A
(II.? pre--ipi-tate was washed two or three tjm.2s wirl,
r! L CILI Z j t, r
ivater, To the supernatent solution ---omb4nej
2-11 1 ti g:3 w a s a d d ed NH4)2CO3 solution to pre,-ipi~a-e
.Ik~li.n~-ear7h, :.arbenates. The filtrate from "he
con-alned Cs. Mg, Na. K, Co Cu. N, an:1 tra ~~a --f
HIf
The solution was acidified with . g
Fe Y Sr and Zr carriers was added and ' ante:- ca::--11
YI'4011 adled Ic, prec,pit-ate the hydrox.i
p
-h-ee 4. ~-ne s After the third hydroxld~,
ning solution was evaporat-d o W
-n, the rema,
_n) a wa*-er b,,th and the residue treated with corv n
d~-CMPCsE NH4_~ salts, The dry residue Cnt-
a n JC rhis was treated three to four 7 Irae-ri
N
..:nver! -lie J.,? s.-I. n-! ' 17 ~,i
n -.a s

33187
The radiochemical determination S/186/61/003/006/007/olo
E051/EI35
dissolved in 2-3 M-P of distilled water. 7-10 m? of glacial
acetic acid was added, the solution stirred and centrifuged,
The residue was washed 2-3 times with 2 m? portions of glacial
acetic acid and the supernated liquid and washings combined,
2-3 mt KBill solution (5 9 B'203 and 17 g KI in 50 nit glacial
acetic acidl was added and the solution heated to boiling.
After standing 4o-60 minutes the precipitate was separated by
centrifuging and washed with glacial acetic acid until the
washings were no longer yellow. After a final wash with alcohol
the precipitate was dried at 140-160 OC to constant weight.
The chemical purity of the C53B'2I9 was checked by spectrographic
analysis and showed no contamination by any likely radioactive
element or Co and Cu. Traces of Ni, Mg, K and Na in quantities
less than 10,,o were present. After reprecipitation of the Cs-7,B'219
none of these elements could be detected, The radiochemical
purity of the recovered cs137 was checked by P-decay curves and
by y-spectrometry. Following the p.-decay curve over 12-20 months
showed that no activity with a half-life of less than 5 years was
present. y-spectrometry was carried out using a single channel
Card 3/ 5

33-L87
The radiochemical determination s/186/61/003/006/007/010
E051/E135
scintillation counter with a sodium iodide crystal, measuring the
o.662 Kev cs137 peak. The activity of Cs 13-7 in the original
sample was calculated using the formula
A = c - n -P e-Xt
p
where~ A - absolute a.--tivity in microcuries~ C - -.nunter
efficiency in dis/min per microcurie for a given weight of
precipitate P .. weight of Co carrier added to the original
sample, p - weight of carrier recovered: X - decay constan!'
for cs137, t - mean time from collection of sample. Chemical
yields were of the order of 60-70%- Using the procedure
outlined it proved possible to determine 10-10 --urie amounts of
cs137, or greater, the whole procedure taking 5-8 hours,
,A'Oknowledgments are expressed to Yu.M. Tolma:bev for hi-,:;
assistance.
There are 2 figures, I table and 8 referen:7es-. 6 Soviet-bl