A study for determination of lead in bay sediments by atomic absorption spectrometry with graphite furnace

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  • 炭素炉原子吸光法による湾底質中の鉛の定量条件の検討
  • タンソロ ゲンシ キュウコウホウ ニヨル ワン テイシツチュウ ノ ナマリ ノ

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Abstract

Lead in bay sediment was separated to two fractions. One fraction was obtained by leaching dried sample (1 g) with a mixture of 1 M hydroxylamine hydrochloride and 25% (v/v) acetic acid, and the other obtained by dissolving the residue in nitric acid. Two sample solutions were finally dissolved in 0.01 M hydrochloric acid (100 ml). Various elements coexisting in these solutions interfered with measurement of lead by atomic absorption spectrometry with graphite furnace. The interference on determination of lead with direct and DDTC-MIBK extraction methods from 10 foreign elements, i.e., Na, K, Mg, Ca, Fe, Mn, Si, Al, Cu and Zn was investigated individually. Further, the direct, standard addition and extraction methods were compared each other by using sample solutions containing 100 ppb of lead and 10 foreign elements which was treated in the same way that of sample solution of bay sediments. To minimize the interference, the extraction method after diluting the sample solution to one-tenth was preferred. Present method was applied to the analysis of sediments of Hiro Bay in Hiroshima Prefecture.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 28 (8), 503-506, 1979

    The Japan Society for Analytical Chemistry

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