原子吸光法におけるヒ素,セレン水冷型中空陰極ランプの応用

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書誌事項

タイトル別名
  • 原子吸光法におけるひ素，セレン水冷型中空陰極ランプの応用
  • The application of arsenic and selenium hollow cathode lamps cooled with water in atomic absorption spectrometry
  • ゲンシ キュウコウホウ ニ オケル ヒソ セレン スイレイガタ チュウクウ イ

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抄録

Although presently available hollow cathode lamps are more than adequate for the determination of most elements by atomic absorption, brighter, more stable sources are still desirable for arsenic and selenium. Arsenic and selenium hollow cathode lamps cooled with water have been designed for this purpose in addition to being optimized for ease of use. They were 5 to 7 times more intense than conventional hollow cathode lamps, yielding stable emission signals with an about 5 min warm-up time. They had a low noise, 0.2% at 40 mA lamp current for arsenic and 0.3% at 50 mA for selenium. Another improvement in performance is an increased sensitivity (concentration μg/ml for 1% absorption), 1.3μg/ml for arsenic and 0.74 μg/ml for selenium in air-acetylene flame being attained. With a carbon tube atomizer, the aqueous solution containing arsenic and/or selenium was transferred to the furnace using 20μl pipet and heated. The sensitivities attained were 1.1 ng/ml (22 pg) for arsenic and 2 ng/ml (40 pg) for selenium. The detection limits were 6 pg for arsenic and 16 pg for selenium.

収録刊行物

  • 分析化学

    分析化学 28 (1), 36-40, 1979

    公益社団法人 日本分析化学会

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