Atomic absorption analysis

Japanese: 原子吸光法 - げんしきゅうこうほう（英語表記）atomic absorption analysis

Atoms have the property of absorbing light of their own unique wavelengths, and this is an analytical method that utilizes this light absorption phenomenon to quantify elements. The atomic lines that absorb light are derived from the electron transition from the atom's ground state (lowest energy level) to an excited state and are called resonance lines. Experimentally, atoms are generated by introducing a solution sample into a high-temperature medium of 2000 to 3000 K using a chemical flame (air-acetylene flame, nitrous oxide-acetylene flame, etc.) or an electrically heated high-temperature carbon furnace, and this atomic vapor layer is irradiated with light equivalent to the resonance lines from a hollow cathode lamp (light source).

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

原子はそれぞれ固有の波長の光を吸収する性質をもつので，この光吸収現象を利用して元素の定量を行う分析法。光を吸収する原子線は原子の基底状態(最低のエネルギー準位)から励起状態への電子遷移に由来するもので共鳴線resonance lineと呼ばれる。実験的には，化学炎(空気‐アセチレン炎，酸化二窒素‐アセチレン炎など)，電気加熱高温炭素炉を用いる2000～3000Kの高温媒体中に溶液試料を導入して原子を生成し，この原子蒸気層に中空陰極ランプ(光源)からの共鳴線に相当する光を照射する。

出典　株式会社平凡社世界大百科事典第２版について　情報

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