Method of determination of alkaline earth metal ions in concentr

Details Method of determination of alkaline earth metal ions in concentr Method of determination of alkaline earth metal ions in concentr

1981-01-12

1981-12-29

Serwin, Ronald

Chemistry: physical processes

Physical processes

Crystallization

23230R, 204 98, G01N 3320

Patent

active

043080308

ABSTRACT:
A method for determining low level concentrations of alkaline earth metals in a concentrated aqueous alkali metal chloride brine containing alkaline earth metal ions comprises heating a sample of the brine to a temperature sufficient to remove water and form anhydrous alkali metal chloride. The anhydrous alkali metal chloride is then further heated to a temperature range in which the alkali metal chloride undergoes a change. The anhydrous alkali metal chloride is then vaporized and the alkaline earth metals atomized and passed through an analyzer where the concentration of alkaline earth metals are determined.
Using the method of the present invention, alkaline earth metals such as calcium can be detected in concentrations as low as 1 part per billion, while magnesium can be detected in concentrations as low as 0.4 parts per billion.

REFERENCES:
patent: 4060465 (1977-11-01), Yokota et al.
patent: 4176022 (1979-11-01), Darlington
patent: 4202743 (1980-05-01), Oda et al.

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