分析化学一直在不断地为提高分析灵敏度而建立各种新的方法,如原子吸收光谱、电感耦合等离子体光谱等。这些方法都为提高分析灵敏度作出了一定的贡献。可调谐激光应用到分析化学上之后,分析灵敏度的提高有了一个重大突破,即达到了分析化学方法的最高灵敏度——检测一个原子。目前达到单原子检测的方法已有两种,一种是Hurst等提出的共 Analytical chemistry has been constantly in order to improve the analytical sensitivity and the establishment of various new methods, such as atomic absorption spectrometry, inductively coupled plasma spectroscopy. These methods all contribute to the improvement of analytical sensitivity. After the tunable laser is applied to analytical chemistry, there is a major breakthrough in analytical sensitivity that achieves the highest sensitivity for analytical chemistry - detecting one atom. At present there are two ways to achieve single-atom detection, one is proposed by Hurst et al