The Atomic Absorption Spectrophotometric Determination of Bismuth in Premixed Inert Gas(Entrained Air)-Hydrogen Flames
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概要
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The atomic absorption spectrophotometric determination of bismuth in aqueous solutions was established in premixed inert gas(entrained air)-hydrogen flames with a "multi-flame" burner in conjunction with a Nippon Jarrell-Ash Model AA-1 atomic absorption/flame emission spectrophotometer. Under the optimum operating conditions, a straight calibration graph was obtained at 223.1 nm in the concentration range of 0-10 ppm and the bismuth sensitivity for a 1% absorption was 0.1 ppm. The effects of acids and other elements on the bismuth atomic absorption were examined. Phosphoric acid caused a considerable depressing effect on the bismuth absorption. Hydrochloric acid remarkably depressed the bismuth absorption at acid concentrations lower than 0.5 N, but it gave no interference in acid concentrations higher than 0.5 N, in which water-insoluble bismuth oxychloride was quickly dissolved in hydrochloric acid. Hydrofluoric, nitric, perchloric, and sulfuric acids had no effect on the bismuth absorption. Most of the elements examined, with the exception of aluminum, boron, cerium, silicon, and zirconium, gave no interference to the bismuth absorption. The depressing interferences due to some elements were removed in appearance by adding a large amount (2000 ppm) of magnesium (as chloride). Furthermore, it was found that most of the depressing interferences could be eliminated by adding a large amount (0.1 M) of ammonium salts (as chloride or perchlorate) to the sample solutions. Bismuth in the presence of magnesium chloride, ammonium chloride, or ammonium perchlorate could be determined without interference from various other elements. The atomic absorption spectrophotometric method was applied to the determination of bismuth in sulfide ores, aluminum-, tin-, and lead-base alloys with satisfactory results.
- 公益社団法人 日本化学会の論文
著者
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Nakahara Taketoshi
Department Of Applied Chemistry College Of Engineering And Department Of Advanced Materials Science
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Musha Soichiro
Department of Applied Chemistry, College of Engineering, University of Osaka Prefecture
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Munemori Makoto
Department of Applied Chemistry, College of Engineering, University of Osaka Prefecture
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