Determination of antimony in plant materials by Zeeman atomic absorption spectrometry after coprecipitation with manganese dioxide

NAKAMURA Susumu, FUDAGAWA Noriko, KAWASE Akira

doi:10.2116/bunsekikagaku.29.7_477

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Other Title

二酸化マンガン共沈‐黒鉛炉ゼーマン原子吸光法による植物試料中のアンチモンの定量
2サンカマンガンキョウチンコクエンロゼーマンゲンシキュウコウホウ
二酸化マンガン共沈-黒鉛炉ゼーマン原子吸光法による植物試料中のアンチモンの定量

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Abstract

A method is described for the determination of antimony in plant materials by using a graphite furnace atomic absorption spectrophotometer with a Zeeman background corrector. The separation of antimony from the interfering elements was achieved by coprecipitation with manganese dioxide. To avoid any loss of antimony by volatilization, the decomposition of a sample with sulfuric and nitric acids was performed in a Gorsuch-type vessel. After the separation of insoluble silicate, which was originally contained in the sample, antimony was coprecipitated with manganese dioxide from the solution of pH1.82.2 The precipitate was dissolved in a mixture of hydrogen peroxide and sulfuric acid. An aliquot of the solution was pipetted into a graphite furnace and dried (110 °C for 60 s), ashed (860 °C for 30 s), and atomized(2350 °C for 7 s). The method was applied to the determination of antimony in plant materials with satisfactory results. The results were (3.0± 0.2) μg/g in average for Orchard Leaves (SRM 1571), which agreed with the certified value {(2.9±0.3)μg/g} and <0.1μg/g for tea leaves.

Journal

BUNSEKI KAGAKU

BUNSEKI KAGAKU 29 (7), 477-482, 1980

The Japan Society for Analytical Chemistry

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