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在夏天当雨过天晴时,在天空往往会出现一条七色的虹带。这是由于日光通过雨滴。而被分散成的。在实驗室中我们同样可使光线通过玻璃稜镜而分散成七色光带。这种由日光分散成的七色光带,即称为光譜。各种物質經灼热发射或放在光线通道中吸收光后都会显出各自的光譜。利用物質的发射光譜和吸收光譜的特征、来研究物質的性質、组成等即称光譜分析。光譜分析具有下列三优点: 一、灵敏度高,在混合物中含有万万分之一的杂質就可析驗出來; 二、分析速度快,用化学分析需几天才能得出結果的工作,改用光譜分析只需几十分鐘就可完成了;
In the summer, when it rains, a rainbow of seven colors often appears in the sky. This is due to the daylight passing through the raindrops. And was dispersed into. In the laboratory, we also can make the light through the glass prism and dispersed into a seven-color band. This daylight scattered into the seven-color light band, known as the spectrum. A variety of substances emitted by the burning or placed in the light channel to absorb light will show their own spectrum. Using the characteristics of the emission spectrum and absorption spectrum of a substance to study the properties and composition of the substance, that is, the spectral analysis. Spectral analysis has the following three advantages: First, high sensitivity, in the mixture contains one millionth of impurities can be tested out; Second, the analysis speed, with chemical analysis takes a few days to arrive at the results of the work, change Only tens of minutes can be done with spectral analysis;