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Comparison of LIBS laser induced spectrometer and fluorescence spectrometer

Release time: 2019-11-06 09:09:36 Click: 1447

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 was not applied until 1960. The advent of this technology, It has been further developed in various fields, and laser-induced spectral breakdown technology is also one of them.


The LIBS laser induced spectrometer is an analytical instrument that analyzes the light emitted by the plasma. The laser is focused on the test site. When the energy density of the laser pulse is greater than the breakdown threshold, the plasma can be generated.


Based on this special plasma ablation technique, usually in the atomic emission spectroscopy technique, the three steps of independent sampling, atomization, and excitation can be realized by the pulse laser excitation source at a time. The continuous bremsstrahlung radiation and ion emission lines of internal elements are generated during the plasma energy decay process. The spectral emission signal is collected by the optical fiber spectrometer, and the characteristic peak intensity corresponding to the element in the analysis spectrum can be used for qualitative and quantitative analysis of the sample.

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 ) The 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) to excite the sample under test. 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 and measurement 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, it is theoretically possible to measure every element in the periodic table. 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 of Handheld Spectrometer Next: Interpretation of Spectral Lines-Resonance Line / Sensitive Line / Last Line / Analysis Line

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