A NEW METHOD FOR THE DETERMINATION OF PARTITION COEFFICIENT OF TRI-n-BUTYL PHOSPHINE OXIDE BETWEEN TOLUENE AND AQUEOUS HYDROCHLORIC ACID

Journal Article · Sat Apr 01 04:00:00 EST 1961 · J. At. Energy Soc. Japan

DOI:https://doi.org/10.3327/jaesj.3.276· OSTI ID:4067594

Ishimori, T; Fujino, T

Tri-n-butyl phosphine oxide (TBPO) may be used as an extractant for many inorganic ions; it has the disadvantage, however, of dissolving into the aqueous phase to some extent. The partition coefficient of TBPO between toluene and 0.5, 1, and 2M hydrochloric acid is determined using the solvent extraction technique with a radioactive indicator (Zn/sup 6//sup 5/). It is found that the trace amount of Zn is comparatively well extracted into TBPO--toluene solution in this acidity range, and the Zn distribution ratio is nearly proportional to the square of TBPO concentration in the organic phase. The concentration of TBPO may therefore be obtained, by measuring the distribution ratio for Zn/sup 6//sup 5/ between an unknown concentration of TBPO and a known concentration of hydrochloric acid. Based on this technique, three methods are proposed and discussed. The results are compared with those obtained by activation analysis of TBPO using P/sup 3//sup 2/. Although the determination of partition coefficient by solvent extraction technique appears to be rather inferior to that using P/sup 3//sup 2/ labeled TBPO, the new method has the advantages of simplicity and rapidity. (auth)

• Research Organization: Japan Atomic Energy Research Inst., Tokyo
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-020797
• OSTI ID: 4067594
• Journal Information: J. At. Energy Soc. Japan, Journal Name: J. At. Energy Soc. Japan Vol. Vol: 3
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ACTIVATION ANALYSIS
ALKYL RADICALS
BUTYL PHOSPHATES
CHEMISTRY
DISTRIBUTION
HYDROCHLORIC ACID
OXIDES
PHOSPHINES
PHOSPHORUS 32
QUANTITATIVE ANALYSIS
SEPARATION PROCESSES
SOLVENT EXTRACTION
TOLUENE
TRACER TECHNIQUES
ZINC
ZINC 65