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A sample stage, detection system and detection method of laser-induced breakdown spectroscopy detection filled with shielding gas

A technology of laser-induced breakdown and protective gas, which is applied in the field of laser-induced breakdown spectroscopy to enhance the signal strength of elements, remove interference, and reduce the relative error of experiments

Active Publication Date: 2019-05-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the present invention provides a sample stage for laser-induced breakdown spectroscopy detection filled with shielding gas. Interference generated by detection can achieve the effect of improving the detection accuracy and precision of laser-induced breakdown spectroscopy

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  • A sample stage, detection system and detection method of laser-induced breakdown spectroscopy detection filled with shielding gas

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Embodiment Construction

[0024] like figure 1 As shown, this embodiment is a detection system for laser-induced breakdown spectroscopy detection filled with protective gas, including a sample placement plate 1 for placing a sample 3, and a sample cover 4 is tightly attached to the sample placement plate 1 through a sealing gasket 2. top surface.

[0025] The sample cover 4 of this embodiment adopts a quartz cover, and the quartz cover includes a cylindrical section in contact with the sample placement plate 1 and a hollow spherical crown part buckled at the top of the cylindrical section.

[0026] The axis of the cylindrical section is arranged vertically, and the bottom opening is pressed on the sealing gasket 2. In order to improve the sealing effect, the top surface of the sealing gasket 2, that is, the side matching the bottom opening of the cylindrical section, has an annular groove for accommodating the bottom edge of the cylindrical section. , In addition, the bottom surface of the sealing gas...

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Abstract

The invention relates to the technical field of laser-induced breakdown spectrum detection, and discloses a sample stage filled with a protecting gas for detecting a laser-induced breakdown spectrum as well as a detection system and a detection method. The sample stage comprises a sample placing plate, wherein a transparent sample cover is buckled onto the sample placing plate in a sealing manner, and a protecting gas input pipe and a vacuum exhaust pipe are arranged on the sample cover. The detection system of the invention comprises the sample stage and further comprises a protecting gas bottle which is communicated with the sample cover through the protecting gas input pipe, an adjusting valve is arranged on a pipeline between the sample cover and the protecting gas bottle, and a vacuum pump which is communicated with the sample cover through the vacuum exhaust pipe is further arranged. The detection method of the invention adopts the detection system, a sample is placed in the sample cover, and a gas in the sample cover is replaced by using the protecting gas bottle and the vacuum pump, so that the sample cover is filled with an inert gas, and lasers are issued into the vertex of the sample cover to excite the sample to be detected. According to the invention, the accuracy and precision of the laser-induced breakdown spectrum detection are improved.

Description

technical field [0001] The invention relates to laser-induced breakdown spectrum detection technology, in particular to a sample stage, detection system and detection method of laser-induced breakdown spectrum detection filled with shielding gas. Background technique [0002] Laser-Induced Breakdown Spectroscopy (LIBS) uses a pulsed laser to focus on the surface of the sample to form a plasma, and ablate the sample through high-energy plasma to excite atomic emission spectroscopy. The collected spectra are analyzed by a spectrometer to identify, classify, qualitatively and quantitatively analyze the samples. This technology can quickly and directly analyze samples, and can detect almost all solid samples and all elements, making up for the shortcomings of traditional elemental analysis methods, so it is widely used in biomedicine, archaeology, environmental monitoring, heavy metal detection in water and explosives detection. and other fields have a wide range of application...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/71G01N21/01
CPCG01N21/01G01N21/718G01N2201/022G01N2201/023
Inventor 何勇於筱岚
Owner ZHEJIANG UNIV