RAPID ANALYSIS OF ALKALINE EARTHS. I. A NEW SEPARATION METHOD OF STRONTIUM FROM CALCIUM BY USE OF DIHYDROXYETHYLGLYCINE AS A MASKING REAGENT

Journal Article · Wed Jun 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

DOI:https://doi.org/10.1246/nikkashi1948.81.6_915· OSTI ID:4093552

Takamoto, S

Dihydroxyethylglycine forms weak complexes with alkaline earths in alkaline medium. Its strontium complex has lower stability than calcium complex, hence if ammonium sulfate is added to an ammoniacal solution containing strontium and calcium complexes, only strontium sulfate precipitates by heating. Alcohol is also added for completion of the precipitation. The solution is ice-cooled for 1 hr, then centnifuged. Washed precipitate is dissolved with excess of disodium ethylenediaminetetraacetic solution, and the strontium can be determined by back-titration with magnesium solution at pH 10 by the usual way. By the method, many samples containing less than 0.2 m mole of strontium and calcium in 2 ml can be analyzed much more rapidly than by ordinary extraction method. Less than 0.2 m mole of magnesium and potassium, 1 m mole of sodium, 3 m mole of ammonium, and 1 m mole of anions such as nitrate, perchlorate, chloride, bromide, iodide, thiocyanate, and acetate do not interfere; most of the anions which precipitate with calcium interfere. (auth)

• Research Organization: Gakushuin Univ., Tokyo
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-010886
• OSTI ID: 4093552
• 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: English

Related Subjects

ACETATES
ALCOHOLS
ALKALINE EARTH METALS
AMINO ACIDS
AMMONIUM COMPOUNDS
ANIONS
BROMIDES
CALCIUM
CALCIUM COMPLEXES
CATIONS
CENTRIFUGATION
CHEMISTRY
CHLORIDES
COMPLEXES
COOLING
CYANATES
CYANIDES
EDTA
ETHYL RADICALS
GLYCINE
HEATING
HYDROXIDES
ICE
IODIDES
MAGNESIUM
MASKING AGENTS
NITRATES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PERCHLORIC ACID
POTASSIUM
PRECIPITATION
QUANTITATIVE ANALYSIS
SALTS
SEPARATION PROCESSES
SODIUM
SOLUTIONS
STABILITY
STRONTIUM
STRONTIUM COMPLEXES
STRONTIUM SULFATES
SULFATES
THIOCYANIDES
USES