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Device and method for analyzing chemical components of single suspension particle

A technology of suspended particles and chemical composition, applied in the field of nonlinear optics, can solve problems such as inability to analyze chemical composition, and achieve the effect of simple structure, easy operation and reasonable design

Active Publication Date: 2019-01-15
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, no real-time in-situ analysis method for the composition of particles in the air has been reported. There are two main reasons for this: the currently known detection methods cannot analyze the chemical composition of particles in fluids (such as air); The laser capture technology has not yet been organically combined with the spectral analysis system

Method used

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  • Device and method for analyzing chemical components of single suspension particle
  • Device and method for analyzing chemical components of single suspension particle
  • Device and method for analyzing chemical components of single suspension particle

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Embodiment 1

[0050] Such as figure 1 and figure 2 As shown, the device for analyzing the chemical composition of a single suspended particle in this embodiment includes a pulsed laser 9, and also includes a hollow beam trapping particle system, an atomic emission spectrum acquisition system, a Raman spectrum acquisition system, and an imaging system;

[0051] The hollow beam trapping particle system includes a continuous laser 1, a hollow beam generating device 2, a beam expander collimator, a high reflection mirror 5 that can change the direction of the hollow beam, a first converging lens 6 and a sample pool 7; the continuous laser 1 , a hollow beam generating device 2, a beam expander collimating device, a high reflection mirror 5 and a first converging lens 6 are sequentially arranged on the same optical path, and sample particles 8 are arranged in the sample cell 7;

[0052] The atomic emission spectrum acquisition system includes a first coupling lens 12 and a laser-induced breakdo...

Embodiment 2

[0066] Adopt the device of embodiment 1 to carry out the method for the chemical composition analysis of single suspended particle, concrete steps comprise:

[0067] Step 1. Obtain a continuous laser beam with a Gaussian distribution from the continuous laser 1, and shape the obtained continuous laser beam into a hollow beam through the hollow beam generating device 2; the hollow beam is generated by a self-phase space beam modulation system, and the continuous laser beam 1. The obtained Gaussian distributed continuous laser beam first passes through the first convex lens 2-1 and focuses on the nonlinear absorption medium 2-2 to generate a hollow beam, which is detected by a CCD camera; the nonlinear absorption medium 2-2 is rubidium The atomic pool can also be replaced by lead glass or sodium atomic pool;

[0068] Step 2: Pass the hollow light beam obtained in step 1 through the beam expander and collimator and enter the high reflection mirror 5, adjust the high reflection mi...

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Abstract

The invention discloses a device for analyzing chemical components of a single suspension particle, comprising a pulse laser, and further comprising a hollow beam particle capturing system, an atomicemission spectrum collecting system, a Raman spectrum collecting system and an imaging system. The hollow beam particle capturing system comprises a continuous laser, a hollow beam generating apparatus, an expanded-beam collimating apparatus, a high-reflecting mirror, a first converging lens and a sample pool. The sample particles are arranged in the sample pool. The atomic emission spectrum collecting system comprises a first coupling lens and a laser induced breakdown spectrometer. The Raman spectrum collecting system comprises a second coupling lens and a Raman spectrometer. In addition, the invention further provides a method for analyzing the chemical components of the single suspension particle by adopting the device. The method for analyzing chemical components of single suspensionparticle captures the sample particles by the hollow light beam and ionizes the sample particles with the pulse laser, collects the atomic emission spectrum information and the Raman spectrum information of the sample particles, and realizes the in-situ analysis of the elemental composition and the material components of the single suspended particle.

Description

technical field [0001] The invention belongs to the application field of nonlinear optics, in particular to a device and method for analyzing the chemical composition of a single suspended particle. Background technique [0002] At present, the detection methods for particulate matter in the air include: infrared absorption spectroscopy, ultraviolet absorption spectroscopy, ultraviolet fluorescence method, chemiluminescence method, turbidity method and scattering method, etc. black, trace heavy metals, etc.) to detect the composition and structure. As an emerging in-situ measurement technology, laser-induced breakdown spectroscopy can analyze not only solid samples, but also liquid and gaseous samples. Analysis has been successfully used in many fields such as materials, metallurgy, combustion, environment, archaeology, space exploration, medicine and military affairs. [0003] Laser-Induced Breakdown Spectroscopy (LIBS) uses the plasma generated by the pulsed laser to abl...

Claims

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Application Information

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IPC IPC(8): G01N21/63G01N21/65
CPCG01N21/63G01N21/65
Inventor 程雪梅贺博牛晨陈浩伟白晋涛
Owner NORTHWEST UNIV
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