Atomic absorption spectrometric determination of strontium, calcium and magnesium in seaweeds

• Published in: BUNSEKI KAGAKU Vol. 19; no. 7; pp. 893 - 899
• Main Authors: FUJITA, Tetsuo, SHIGEMATSU, Tsunenobu
• Format: Journal Article
• Language: English; Japanese
• Published: Tokyo The Japan Society for Analytical Chemistry 1970; Japan Science and Technology Agency
• ISSN: 0525-1931
• DOI: 10.2116/bunsekikagaku.19.893

A method for the determination of strontium, calcium and magnesium in seaweeds by atomic absorption spectrochemical analysis has been examined. For the simultaneous determination of these elements in one solution of a sample, the standard addition method was suitable for strontium and the calibrationline method was recommended for calcium and magnesium. Addition of 500 ppm of strontium and 250 ppm of calcium was effective for the elimination of influence of coexisting elements and acid for the determination of calcium and magnesium. The condition recommended for strontium, calcium and magnesium were, respectively, wavelength 4607Å, 4227Å and 2852Å, hollow cathod lamp current 13 mA, 6 mA and 7 mA, slit with 100μ, 100μ and 100 μ, hydrogen pressure 0.5 kg/cm2, 0.5 kg/cm2 and 0.4 kg/cm2 and air pressure 1.0 kg/cm2, 1.2 kg/cm2 and 1.0 kg/cm2. The instrument used was Nippon Jarrell ash atomic absorption spectrophotometer model AA-1.