RADIUM AND BARIUM NITRILOTRIACETIC ACID (NTA) COMPLEXES IN AQUEOUS SOLUTION

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Radiokhimiya (U.S.S.R.) For English translation see Sov. Radiochem. (Engl. Transl.)

OSTI ID:4175007

Nikol'skii, B P; Trofimov, A M; Vysokoostrovskaya, N B

In studying the distributions of trace amounts of Ba/sup 140/ and Ra/sup 226/ between the cation exchanger KU-2 and a solution with and without a complexing agent over a pH range 4 to 8. it was eatablished that anionic nitrilotriacetate complexes of the type STARaX!/sup -/ are formed at pH of 6 to 8; X is the NTA anion. The composition of the anionic barium complex, as established by Schwartzenbach, was confirmed. Formation of this complex in significant amounts (>5%) begins at a concentration of complexing agent STAX/sup 3- ions) of about 4 x 10/sup -8/ moles/l and at a concentration of complexing agent of 2 x 10/sup -5/ moles/l; the concentration of free barium in solution is less than 5% of the total concentration of barium. The corresponding cocentrations of complexing agent for radium are 10/sup -7/ moles/1 and 5 x 10/ sup -5/ moles/1. Instabillty complexes of pK/sub Ra/ = 5.75 and pK/sub Ba/ = 6.17 (Schwartzenbach found pK/sub Ba/ = 6.41) were calculated from the experimental data. These values indicate that the barium complex is somewhat stronger than the radium complex. (R.V.J.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-14-009437
• OSTI ID: 4175007
• Journal Information: Radiokhimiya (U.S.S.R.) For English translation see Sov. Radiochem. (Engl. Transl.), Journal Name: Radiokhimiya (U.S.S.R.) For English translation see Sov. Radiochem. (Engl. Transl.) Vol. Vol: 1; ISSN RADKA
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ACIDITY
BARIUM 140
BARIUM COMPLEXES
CHELATES
CHEMISTRY
DISTRIBUTION
ION EXCHANGE
NTA
RADIUM 226
RADIUM COMPLEXES
RESINS
SOLUTIONS
STABILITY
TRACER TECHNIQUES
WATER