free radical mass spectrometry

例句：

1. 1. The researchers used free radical mass spectrometry to analyze the chemical composition of the sample.
   研究人员使用自由基质谱法分析了样品的化学成分。
2. 2. Free radical mass spectrometry is a powerful tool for studying the mechanisms of chemical reactions.
   自由基质谱法是研究化学反应机制的强大工具。
3. 3. In free radical mass spectrometry, the sample is subjected to an electric field that causes it to fragment into smaller molecules.
   在自由基质谱法中，样品受到电场作用，使其分解成更小的分子。