Published May 1984 | Version v1
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Determination of hydroxylamine in purex process solutions

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Description

In PUREX process solutions hydroxylamine or HAN (hydrolammonium nitrate) respectively, can be oxidized specifically to give nitrous acid, HNO2, which by sybsequent GRIESS reaction forms the well-known reddish azo-dye. Its absorbance is spectrophotometrically measured at 520 nm and results in linear calibration graphs covering the analytical range of 10-5 to 10-6 M NH2OH. The influence of other reductants (N2H4, Pu-III) as well as of further PUREX main constituents like U-VI, HNO3 etc. was checked-up and determined quantitatively. There are no analytical limitations in case of HAN concentrations > 10-2 M. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Hydroxylamin laesst sich unter PUREX-Randbedingungen spezifisch zu salpetriger Saeure HNO2 oxidieren, die durch Diazotierung von Sulfanilsaeure und Kupplung mit α-Naphthylamin zu rotem Azofarbstoff umgesetzt wird. Spektralphotometrische Extinktionsmessungen bei 520 nm ergeben im Messbereich 10-5 bis 1-6 M NH2OH lineare Eichfunktionen. Der Einfluss anderer Reduktionsmittel im Prozess (N2H4, Pu-III) sowie derjenige von U-VI, HNO3 u.a.m. wurde untersucht und quantitativ bestimmt. Daraus ergeben sich fuer NH2OH-Konzentrationen > 0,01 M keine analytischen Einschraenkungen. (orig.)

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Additional details

Additional titles

Original title (German)
Bestimmung von Hydroxylamin in Purex-Prozessloesungen

Publishing Information

Imprint Pagination
13 p.
Report number
KFK--3668

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
15061084
Subject category
S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
Descriptors DEI
AZO DYES; HYDROXYLAMINE; INTERFERING ELEMENTS; OXIDATION; PUREX PROCESS; RELIABILITY; SPECTROPHOTOMETRY
Descriptors DEC
AMINES; AZO COMPOUNDS; CHEMICAL REACTIONS; DYES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; REPROCESSING; SEPARATION PROCESSES

Optional Information

Secondary number(s)
PWA--100/83.