水素化ホウ素ナトリウムを用いる鉛の還元気化原子吸光法におけるニクロム酸カリウム,過酸化水素,ペルオキソニ硫酸塩,又は過マンガン酸カリウムによる増感効果

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書誌事項

タイトル別名
  • 水素化ほう素ナトリウムを用いる鉛の還元気化原子吸光法における二クロム酸カリウム，過酸化水素，ペルオキソ二硫酸塩，または過マンガン酸カリウムによる増感効果
  • Sensitivity enhancement effect by the combined use of dichromate, hydrogen peroxide, peroxodisulfate, or permanganate with sodium borohydride in atomic absorption spectrometry of lead
  • スイソカ ホウソ ナトリウム オ モチイル ナマリ ノ カンゲン キカ ゲンシ
  • 水素化物生成-原子吸光法による微量鉛の定量(その1)
公開日
1978
DOI
  • 10.2116/bunsekikagaku.27.12_759
公開者
公益社団法人 日本分析化学会

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説明

A method was proposed for the rapid and sensitive determination of lead by atomic absorption spectrometry after hydride evolution process. Compared with the cases using borohydride solution alone as a reductant, the sensitivity was enhanced extremely by the addition of dichromate, hydrogen peroxide or persulfate to the acidic solution of lead(II) prior to the injection of borohydride solution. Permanganate also exhibits such enhancement effect in some grade. When dichromate is used together with borohydride, malic acid or tartaric acid should be used as the acid. Various factors affecting the evolution of lead hydride, especially acids (and its acidity) and the concentration of above sensitivity enhancement reagents, were investigated. The determination procedure is as follows: Five to ten cm3 of sample solution was put into a reaction vessel (Hitachi Co., Ltd.), reagents were added, and the solution having one of the following compositions was prepared; (A) 0.25 M malic acid (tartaric acid)-0.025 M dichromate, (B) 0.5 M HNO3 (HCl, HClO4, 0.25 M H2SO4)-1.3 M H2O2, (C) 0.3 M HNO3 (HCl, HClO4)-0.12 M K2S2O8. The volume of the solution was adjusted to 20 cm3. After the injection of 5 cm3 of w/v NaBH4, the evolved lead hydride was introduced into nitrogen-hydrogen flame of the atomic absorption spectrometer. The detection limit of the method (S/N=2) is 15, 20, and 20 ng for (A), (B), and (C) system, respectively. The calibration graph was linear up to 1.5μg Pb. Effect of diverse ions on the determination of lead was also examined.

収録刊行物

  • 分析化学

    分析化学 27 (12), 759-764, 1978

    公益社団法人 日本分析化学会

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