…Recent high-resolution mass analyzers have sensitivities on the order of ppm in atomic mass units, and are used as one of the methods for elemental analysis. Nuclear magnetic resonance was originally invented independently by Felix Bloch (1905-82) and Edwards Miles Purcell (1912-97) as a means of measuring the magnetic moment of nuclei. However, since it was discovered that the resonance frequency depends not only on the type of nucleus but also on its chemical environment (chemical shift), nuclear magnetic resonance has been eagerly developed by chemists. … [Nuclear Magnetic Resonance] … *Some of the terminology references "Purcell, EM" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…近年の高分解能質量分析器は原子質量単位でppmのオーダーの感度をもち,元素分析法の一つとしても利用されている。核磁気共鳴は,もともと核の磁気モーメント測定手段として,ブロッホFelix Bloch(1905‐82)とパーセルEdwards Miles Purcell(1912‐97)によって独立に考案された。しかし共鳴周波数は核の種類だけではなく,その化学的環境にも依存すること(化学シフト)が発見されて以来,核磁気共鳴は化学者によって貪欲に開発された。… 【核磁気共鳴】より… ※「Purcell,E.M.」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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