鉛の水素化物生成-原子吸光法の基礎的条件の検討及び岩石試料などへの応用

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書誌事項

タイトル別名
  • 水素化物生成‐原子吸光法による微量鉛の定量　ＩＩ　　鉛の水素化物生成‐原子吸光法の基礎的条件の検討及び岩石試料などへの応用
  • Investigation of some fundamental conditions for the determination of lead with hydride evolution-atomic absorption spectrometry, and application to the complex samples.
  • ナマリ ノ スイソカブツ セイセイ ゲンシ キュウコウホウ ノ キソテキ ジョ
  • 水素化物生成-原子吸光法による微量鉛の定量(その2)
公開日
1980
DOI
  • 10.2116/bunsekikagaku.29.8_522
公開者
公益社団法人 日本分析化学会

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説明

A rapid and sensitive method for the determination of lead by hydride evolution-atomic absorption spectrometry was investigated by using two types of gas handling systems; one of them involves gaseous hydride to be introduced directly into a slot burner (N2-H2 flame, type A generator) and the other to be collected in a reservoir followed by introduction to the burner (type B generator). To attain high sensitivity of the method, a combined use of potassium dichromate, hydrogen peroxide, or persulfate with sodium borohydride was essential in both types of hydride generator. In the nitric acid-hydrogen peroxide-borohydride system, when applied to the type A generator, the sensitivity was dependent of the initial reaction temperature from 20°C to 65°C and was enhanced twice at 65 °C. However, this technique could not be applied to the complex samples containing iron(III) and the other foreign ions. Though instability of the lead hydride was confirmed with the type B generator, the collection time was not so critical between 15 s to 30 s. This merit improves the relatively severe determination conditions required with the type A generator. The detection limit (S/N=2) and reproducibility of the method (0.05 M HNO3-0.4 M Na2S2O8-0.13 g NaBH4, type B generator) based on ten determinations of 0.5 μg Pb(II) were 10 ng and 2.9 %, respectively. The proposed method was applied successfully to the standard rocks (JB-1, JG-1), standard steels (JSS 159-3, 160-3, 161-3) and water samples.

収録刊行物

  • 分析化学

    分析化学 29 (8), 522-526, 1980

    公益社団法人 日本分析化学会

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