Determination of atmospheric mercury by flameless atomic absorption spectrometry

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Other Title
  • 環境大気中の水銀のフレームレス原子吸光分析法
  • カンキョウ タイキチュウ ノ スイギン ノ フレームレス ゲンシ キュウコウ

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Description

Basic conditions were examined on the analysis of mercury in the atmosphere and evacuated gas in which organic compounds, halogen and sulfuric compounds were coexistent. Porous cobalt (III) oxide {(0.81.7) mm in particle size} was packed into a quartz combustion tube (9 mm in inside diameter) in a range of 120 mm long as a catalyst for oxidative decomposition. Organic compounds were decomposed by heating at (700750)°C. Porous silver {(0.81.7)mm in particle size} was packed in a range of 60 mm long and heated at 550°C, and halogen and sulfuric compounds were removed. Cobalt (III) oxide did not produce such volatile compounds as produced in the case of copper (II) oxide, and there was no such breakage in a tube as observed in the case of manganese(IV) oxide. Mercury vapor was absorbed in porous silver {(0.50.8)mm in particle size} packed into a quartz tube (3.5 mm in inside diameter) in a range of 10 mm long. Mercury absorbed in porous silver was determined by flameless atomic absorption spectrometry. When carbon layer was packed into the front of a mercury collecting tube and heated at 600°C, recovery of mercury ranged from 99 to 100% and that obtained without carbon layer was (8392)%, respectively. In this determination, furnace carbon, activated carbon, carbon fiber and glassy carbon were employed, and favorable results were obtained when a tube was filled with activated carbon in the middle and carbon fiber in both sides.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 26 (10), 651-655, 1977

    The Japan Society for Analytical Chemistry

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