RAPID ANALYSIS OF ALKALINE EARTHS. II. SEPARATION OF BARIUM FROM STRONTIUM

Journal Article · Sat Oct 01 04:00:00 EDT 1960 · Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi

OSTI ID:4093466

Takamoto, S

A commonly used method for the separation of barium from strontium is that of the precipitation of barium as chromate under careful control of pH, but it is difficult to apply when a large amount of strontium is present. A modification of this procedure by the use of hydroxyethyliminodi-acetic acid or nitrilotriacetic acid as a masking reagent is offered. When potassium chromate is added to an ammoniacal solution containing barium, strontium, and a large excess of the masking reagent, only barium chromate is precipitated. The solution is heated for 10 min on a boilingwater bath, and then ice-cooled for 1 hr. After centrifuging, the washed precipitate is dissolved with phosphoric acid and the chromate is titrated with ferrous solution, using sodium diphenylaminesulfonate as an indicator. By this method, less than 0.1 m mole of barium can easily be separated from less than 0.8 m mole of strontium with little coprecipithtion. Nitrilotriacetic acid has stronger masking power than hydroxyethyliminodiacetic acid but it suffers from slight pH effect. Alkaline metal ions and common anions do not interfere but most of the anions which precipitate strontium, such as fluoride, nitrite, carbonate, oxalate, phosphate, etc., interfere. (auth)

• Research Organization: Gakushuin Univ., Tokyo
• NSA Number: NSA-15-010895
• OSTI ID: 4093466
• Journal Information: Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi, Journal Name: Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi Vol. Vol: 81; ISSN NPKZA
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

ACETIC ACID
ACIDITY
ALKALINE EARTH METALS
AMINES
AMMONIA
ANIONS
BARIUM
CARBONATES
CENTRIFUGATION
CHELATES
CHEMISTRY
CHROMATES
ETHYL RADICALS
FLUORIDES
HEATING
HEIDA
HYDROXIDES
INTERFERING ELEMENTS
MASKING AGENTS
NITRITES
NTA
ORGANIC ACIDS
ORGANIC NITROGEN COMPOUNDS
OXALATES
PHENYL RADICALS
PHOSPHATES
PHOSPHORIC ACID
PRECIPITATION
SEPARATION PROCESSES
SODIUM COMPOUNDS
SOLUTIONS
STRONTIUM
SULFONIC ACIDS