SCIENTIFIC ABSTRACT FR:MALYUTINA, T.M. TO:MALYUTIN, G.I.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001032000032-6
• Release Decision: RIF
• Original Classification: U
• Document Creation Date: November 2, 2016
• Sequence Number: 32
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTR

SOV/34?-24-11-E3/3 j
The hetercnination of Tantalum by Differential Spec;trophotomc~t;ry
solution did not give Hickey and 3c+ung (Yangj i~`j j~ w:: in-
crease in the accuracy of measuretne~nt. Since ~~rs.cticall,' no
data exist in the Soviet publications on differential s~ectro-
photometry stable on the application of this method :is ~~.ven.
Tantalum ws,s determined in the ultra-violet x~e~ian ay .r+~-
acting it w.fth pyrogallol i,n an oxalate-acid ~rticadium. t~. q ;N HCl
solution w~.th Q00 mg pyrogallol, 1?0 mg flmmc~n;i.l..irn oxr,,l.rt uc;, ~:cnci
30-jp mg potasNi~rm pyrosulfata per 10 ml of sclution, ~zddcd,
was used for this purpose. A series, of solut~.cna containing
0.5 to 1.2 mg Ta205 were prepared; one of these solt:ti ons
was the zero solution (C1) and a second solution of righor
concentration (C2) was measured in relation to the fir;:;t. The
interval 0.7 to 0.9 mg Ta~OS was found to be optimal far C1�
In the presence of niobiun, at a concentration of Nb2O5:Ta2O5=
3:1, the xelative error in the tantalum determination eras
~,bou�t 0.5f, and with a ratio of 6:1 about 1~. The optical.
properties of the titanium and tantalum pyrogallol complex
Card ,?~3 compounds are ad+iitive, so that with a ratio of TiOZ:T~.2O5=
APPROVED FOR RELEASE. 06/23/11 CIA-RDP86-005138001032000032-6

AUT&~RS: Dobl4ina, B. ~d., I~alyuti na, T. P~. SCY/`,%-~:_~ , _F !7~
,. ,
TITLE: The Determinat`on~,...o� ~ant~i~.izr~t"~y'~ Differential Specf~rophotc-
met.ry (Opredeleniye tantala differentsial~noy spr>ktro:foto-
metriyey)
PERI~JDICAL: Zavodskaya Labo:ratoriya, 1858, Vol 2r~, l~r 11, pp 1;~3~-�13~~3
(USfiR~
ABSTRACT: Relative errors can be so diminished by the di.fferent:iai method
thai; this method is as exact as gr,~vimetric a.;~alysis. The
method ~.s based on using as a zero solutl.on e, sol~it:io~1 c~:f thc~
element to be df?texmined in increased edncent:ra.tions. Thy.
theoretical basis of the method wa+s developed by Hisk4~y f,t al.
(Khi.ski~ (Refs 1-3), and it can be shovrn mathematical:!y ~~hat
an increase in the optical density of the standard so:lut~-or.
increases the accuracy of the dete~~mination, and that thE~
I
erxor for .-he case z~ 1 is minim~~le In instruments in ar'r;ic%
1
it is not ossi?ale to regulate the light intensity ovE~r ~; ;vide
Card 1~3 range an increase in the optical dE~nsity of the standard
APPROVED FOR RELEASE. 06/23/11 CIA-RDP86-005138001032000032-6

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