Synchronous acquisition device and method of atom and molecular spectrum

A molecular spectrum and atomic spectrum technology, which is applied in the field of synchronous acquisition devices for atomic and molecular spectra, can solve problems such as inconsistent measurement scales, difficulty in obtaining molecular and atomic spectra at the same time, and inability to achieve correlation analysis.

Active Publication Date: 2015-06-24
北京市农林科学院智能装备技术研究中心
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Problems solved by technology

[0005] (1) Many molecular and atomic spectrum measurements require a certain amount of time. For example, infrared spectrum measurement requires certain accessory preparation or preprocessing (such as infrared emission measurement, preheating is required), and real-time calibration, so it is difficult to obtain molecules and atoms at the same time. Spectrum, and some samples have strong time-varying charact

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  • Synchronous acquisition device and method of atom and molecular spectrum
  • Synchronous acquisition device and method of atom and molecular spectrum

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Embodiment 1

[0080] In this embodiment, the sample is soil, and the goal of soil analysis is to measure nutrients and heavy metals in the soil quickly, in real time, and in situ. Soil nutrients are mainly expressed as molecular information such as nitrate nitrogen, ammoniacal nitrogen, and exchangeable potassium, while heavy metals are mainly expressed as atomic information. Therefore, it is difficult to analyze the content of heavy metals and nutrients at the same time with existing molecular or atomic spectroscopy.

[0081] According to the method of the present invention, the implementation method of this embodiment is as follows:

[0082] In view of the density and texture of the soil sample, a 1064nm laser with a power of 250mJ was used in the embodiment.

[0083] First, the laser hits the soil sample 10 times with an energy of 150 mJ. After each hit is delayed by 2 microseconds, the visible light spectrometer obtains the plasma spectrum through the optical fiber collector. The wave...

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Abstract

The invention discloses a synchronous acquisition device and method of an atom and molecular spectrum. The method comprises the following steps: striking the surface of a to-be-detected sample repeatedly by focused energy of a laser device, stimulating the to-be-detected sample to be at a plasma state, and collecting an atom spectrum transmitted by the to-be-detected sample at the plasma state by an optical fiber collector via a visible spectrograph; striking the surface of the to-be-detected sample repeatedly by the focused energy of the laser device, and collecting an infrared spectrum transmitted externally by the surface of the to-be-detected sample by an infrared optical fiber collector via the visible spectrograph so as to obtain a molecule spectrum; transmitting the molecular spectrum to a signal collecting control system by the atom spectrum and the infrared spectrograph via the visible spectrograph; and matching the atom spectrum and the molecular spectrum by the signal collecting control system so as to obtain the corresponding relationship between the atom spectral line and a functional group. The method can be used for obtaining the molecule and atom spectrum with the same size synchronously within a short time, and achieving the correlation of the characteristic relation of the atom spectrum and the molecular spectrum.

Description

technical field [0001] The invention relates to the technical fields of spectroscopy and analytical chemistry, in particular to a device and method for synchronously acquiring atomic and molecular spectra. Background technique [0002] Spectroscopy is an effective means to characterize and measure the structure of matter. Spectral characterization and measurement methods include atomic spectroscopy and molecular spectroscopy. Atomic spectroscopy (such as X-ray fluorescence spectroscopy, laser-induced breakdown spectroscopy, etc.) characterizes the element type and concentration of the sample to be tested through the energy and transition of atoms. Molecular spectroscopy (such as Fourier transform infrared spectroscopy, Raman spectroscopy, laser ring-down spectroscopy, etc.) characterizes the molecular form and quantity of the sample to be tested through the vibration and rotation of functional groups. [0003] Both atomic spectroscopy and molecular spectroscopy have been w...

Claims

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Application Information

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IPC IPC(8): G01N21/63
Inventor 董大明赵春江郑文刚郎筠矫雷子鲍锋郑文生赵贤德
Owner 北京市农林科学院智能装备技术研究中心
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