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前言原子吸收光谱法具有灵敏度高、准确度好、分析速度快、设备及操作简单等优点。但它也有局限性,例如要求备有各种元素灯,因而难于做定性分析和多元素同时测定等。原子荧光光谱法对许多元素的分析灵敏度比原子吸收光谱法高。但荧光强度通常较弱,需要高强度的激发光源,从而限制了灵敏度进一步提高和进一步扩大应用。然而激光,由于它具有如下特性:(1)相干性好;(2)单色性好;(3)指向性好,光束细;(4)强度大;(5)波长可调谐等,所以能够克服原子吸收、原子荧光法的上述缺点。即特性(1)和(2)有利于提高原子吸收光谱的分辨能力
Introduction Atomic absorption spectrometry with high sensitivity, accuracy, analysis speed, equipment and simple operation and so on. But it also has limitations, such as requiring a variety of elements of light, so difficult to do qualitative analysis and simultaneous determination of multiple elements. Atomic fluorescence spectrometry for many elements of the analytical sensitivity higher than atomic absorption spectrometry. However, the fluorescence intensity is usually weaker, which requires high intensity of excitation light source, which limits the sensitivity to further improve and further expand the application. However, the laser has the following characteristics because of its advantages as follows: (1) good coherence; (2) good monochromaticity; (3) good directivity and thin beam; (4) high intensity; Overcome the above disadvantages of atomic absorption and atomic fluorescence. That is, characteristics (1) and (2) are conducive to improving the resolving power of atomic absorption spectroscopy