ICP-AES Determination of Strontium in Natural Brine

ICP-AES was applied to the determination of Sr in natural brine. Wavelength of 216.579 nm was selected as analytical spectral line for the determination. Value of detection limit (3S/N) of 0.01 mg·L-1 was found. The proposed method was applied to the determination of Sr in samples of natural brine, the results obtained was in consistency with those obtained by FAAS. Test for recovery was made by standard addition method, and values of recovery obtained were in the range of 95.9%-102.0%. Precision was tested by addition of standard strontium solution at 5 concentration levels, values of RSD′s (n=12) found were in the range of 0.43%-3.3%.