...When a substance is placed in a flame, the atoms and atomic groups that compose it are excited by the heat of the flame and emit light. This emission spectrum is called a flame spectrum, and the method of analyzing it to analyze mainly metallic elements is called flame analysis. There are two methods of flame analysis: (1) flame photometry, in which a liquid sample is sprayed into a flame, and the light of wavelengths specific to each element is selected from the resulting flame spectrum, and the intensity is measured electrically to perform quantitative analysis of the elements; and (2) a method in which a sample is placed directly in the flame and observed with the naked eye or through cobalt glass, or a simple direct-view spectroscope is used to perform qualitative analysis of the elements (see the section on flame color reactions). *Some explanations of terms that mention "flame analysis" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…物質を炎の中に入れると,それを構成する原子や原子団が炎の熱で励起され,発光する。この発光スペクトルを炎光スペクトルといい,これを解析して主として金属元素を分析する方法を炎光分析flame analysisという。炎光分析の手法としては,(1)液状の試料を炎の中に噴霧し,このとき得られる炎光スペクトルの中から各元素に固有の波長の光を選び出し,その強度を電気的に測定して元素の定量分析を行う炎光光度法と,(2)試料を直接炎の中に入れて,肉眼あるいはコバルトガラスを通して観察したり,簡単な直視分光器を利用して元素の定性分析を行う方法(〈炎色反応〉の項参照)とがある。… ※「flame analysis」について言及している用語解説の一部を掲載しています。 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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