PAPER ELECTROCHROMATOGRAPHIC STUDIES OF SOME RADIOISOTOPES

Journal Article · Thu Dec 01 04:00:00 EST 1960 · J. Chinese Chem. Soc. (Taiwan)

DOI:https://doi.org/10.1002/jccs.196000019· OSTI ID:4090589

Pan, K; Cheng, H

The mobilities of Co/sup 60/, Sr/sup 90/ Cs/sup 134/, Ce/sup 144/ and Eu/ sup (+Eu/sup 154/), as a function of pH in 1% citric acid solutions of their carrier-free chlorides, were studied. Cesium ion, which migrated toward the cathode, decreased in mobility linearly as the pH increased. Strontium ion had an electromigration behavior similar to that of Cs ion up to pH 5 then changed the direction of migration toward the anode at pH 4.5; Co and rare earth ions, having a similar behavior, changed their ionic charge at pH 2.2 and 3.2, respectively. By taking advantage of this behavior, Cs could be separated from bi- and tervalent metal ions at any pH values, whereas Y could be separated from Sr ions, and rare earth from Co ions only at low pH values. The separation of Y/ sup 90/ from Sr/sup 90/ was effectively carried out in an 80% alcoholic solution of citric acid. After electrophoresis for 2 hr, Sr migrated 20 cm while Y moved only 2 cm. Cerium and Eu behave similarly to Y. Their migration distances decreased with increasing pH values; they changed their ionic charge at pH 2.7, migrated toward the anode, and then their mobility gradually decreased above pH 5. At higher pH values in the acid region, however, Eu showed slightly greater velocity than Ce. This slight difference may be useful in the separation of Ce, Eu, and Y at higher field strengths and prolonged times of operation. Although the radioactivity maxima of Ce and Eu separate by 1 cm from each other, these rare earths diffuse widely to about 4 cm on the paper strips; therefore, quantitative separation of these 2 metals under the present experimental conditions was not possible. The short-lived Pr/sup 144/ could not be detected in the electrochromatograms of Ce/sup 144/, because the daughter decayed almost completely as soon as it is separated. It is reasonable to expect that Pr would be located between Ce and Eu. (BBB)

• Research Organization: National Taiwan Univ., Taipai, China
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-010159
• OSTI ID: 4090589
• Journal Information: J. Chinese Chem. Soc. (Taiwan), Journal Name: J. Chinese Chem. Soc. (Taiwan) Vol. Vol: 7
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ALCOHOLS
ANODES
CARRIER-FREE
CATHODES
CATIONS
CERIUM 144
CERIUM CHLORIDES
CERIUM COMPOUNDS
CESIUM 134
CESIUM CHLORIDES
CESIUM COMPOUNDS
CHEMISTRY
CHROMATOGRAPHY
CITRIC ACID
COBALT 60
COBALT CHLORIDES
COBALT COMPOUNDS
CONFIGURATION
DECAY
DIAGRAMS
DIFFUSION
ELECTROCHEMISTRY
ELECTROPHORESIS
EUROPIUM 152
EUROPIUM 154
EUROPIUM CHLORIDES
EUROPIUM COMPOUNDS
HALF-LIFE
IONS
ISOTOPE SEPARATION
MOTION
PAPER
PRASEODYMIUM 144
PRASEODYMIUM CHLORIDES
PRASEODYMIUM COMPOUNDS
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RADIOACTIVITY
RADIOCHEMISTRY
RADIOISOTOPES
RARE EARTHS
REACTION KINETICS
SEPARATION PROCESSES
SOLUTIONS
STRO