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Comparison of LIBS laser induced spectrometer and fluorescence spectrometer

Release time: 2019-11-06 09:09:36 Click: 1113

1916 年被一位伟大的物理学家爱因斯坦发现,直到 1960 年才被应用制造,这一项技术的问世,在各个领域得到了进一步的发展,激光诱导光谱击穿技术也是其中一项。 Laser, laser, these words are used to describe the amplification of light generated by excited radiation. Laser was discovered by Einstein, a great physicist in 1916 , and it was not applied to manufacture until 1960. This technology came out, Further development has been made in various fields, and laser-induced spectral breakdown technology is also one of them.


LIBS laser induced spectrometer is an analysis instrument for analyzing the emitted light of plasma. The laser is focused at the test site. When the energy density of the laser pulse is greater than the breakdown threshold, plasma can be generated.


Based on this special plasma ablation technique, usually the three separate steps of sampling, atomization and excitation in the atomic emission spectroscopy technique can be achieved by a pulsed laser excitation source at one time. During the process of plasma energy decay, continuous chirping radiation and ion emission lines of internal elements are generated. Spectral emission signals are collected through a fiber optic spectrometer, and the characteristic peak intensities corresponding to the elements in the spectrum can be used for qualitative and quantitative analysis of samples.

LIBS激光诱导光谱仪与荧光光谱仪的对比

Comparison of LIBS laser induced spectrometer and fluorescence spectrometer

XRF fluorescence spectrometer technology

XRF )仪器由激发源( X 射线管)和探测系统构成。 ( XRF ) instrument consists of an excitation source ( X -ray tube) and a detection system. 射线管产生入射 X 射线(一次射线),激励被测样品。 The X -ray tube generates incident X -rays (primary rays) and excites the measured sample. X 射线,并且不同的元素所放出的二次射线具有特定的能量特性。 Each element in the sample emits secondary X -rays, and the secondary rays emitted by different elements have specific energy characteristics.

The detection system measures the energy and quantity of these emitted secondary rays. Then, the instrument software converts the information collected by the control system into the types and contents of various elements in the sample. X 射线荧光原理,理论上可以测量元素周期表中的每一种元素。 Using the principle of X -ray fluorescence, theoretically every element in the periodic table can be measured. 11 号元素(钠 Na )到 92 号元素(铀 U )。 In practical applications, the effective element measurement range is element 11 (sodium Na ) to element 92 (uranium U ).

下一篇: 光谱仪谱线解读-共振线/灵敏线/最后线/分析线的关系 Previous: X-ray scattering from a handheld spectrometer Next: Interpretation of the spectral line of a spectrometer-the relationship between resonance line / sensitive line / last line / analysis line

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