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Highly-sensitive rapid detection device for elements in liquid

A technology for detection devices and elements, which is applied in measuring devices, instruments, and material analysis through optical means, can solve the problems of low detection sensitivity of LIBS and achieve the effect of improving sensitivity

Inactive Publication Date: 2014-10-22
ZHEJIANG NORMAL UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

However, when detecting in liquid samples, the detection sensitivity of LIBS in liquid is very low due to negative effects such as liquid level fluctuation and atomic radiation quenching.

Method used

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  • Highly-sensitive rapid detection device for elements in liquid

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing:

[0015] A high-sensitivity and rapid detection device for elements in a liquid, including a YAG laser 9, a focusing lens 11, an optical fiber 10, a spectrometer 6, a DG535 trigger 8, and a computer 7, is characterized in that the high-sensitivity and rapid detection device for elements in a liquid is designed There is a system consisting of a vacuum chamber and a pulse injection device, and the vacuum chamber and the pulse injection device are connected through a catheter.

[0016] The vacuum chamber is composed of a cylindrical container 1, a sample collection device 3, a sample discharge device 4, and a vacuum pump 5. The lower right side of the cylindrical container 1 is connected to the vacuum pump 5 through a conduit, and the sample collection device 3 is located at the bottom of the cylindrical container 1. , is also connected with the external sampling device 4 throug...

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Abstract

The invention discloses a highly-sensitive rapid detection device for elements in liquid. The highly-sensitive rapid detection device comprises a YAG (yttrium-aluminum-garnet) laser, a focusing lens, optical fibers, a spectrograph, a trigger and a computer. The highly-sensitive rapid detection device for the elements in the liquid is characterized by being internally provided with a system composed of a vacuum cavity body and a pulse sampling device, and the vacuum cavity body and the pulse sampling device are connected through a guide tube. The device has obvious characteristics that liquid column samples with different diameters are rapidly detected in a vacuum environment, on one hand, the limit of ambient gas to plasma expansion and interference of an air background spectrum to a plasma spectrum are reduced in the vacuum environment, on the other hand, the liquid is excited by lasers in a form of a thin liquid column, so as to overcome negative effects of liquid level fluctuation and atomic radiation quenching and facilitate the laser induction to generate strong and stable plasma radiation, and additionally, the controllable pulse liquid column samples are adopted, so that the detection stability can be improved and the sample consumption can be reduced.

Description

technical field [0001] The invention belongs to the field of material element analysis by laser-induced breakdown spectroscopy, and in particular relates to a high-sensitivity and rapid detection device for elements in liquid. Background technique [0002] With the development of modern industry, due to the failure of proper treatment in the process of mining, smelting and processing of heavy metals in our country, many heavy metals entered the atmosphere, water and soil, causing serious harm to the ecological environment, among which water Heavy metal pollution in the environment is particularly prominent, so it is necessary to detect heavy metal elements in water. At present, the techniques used in the detection of heavy metals in the water environment include electrochemical analysis, atomic absorption spectrometry (AAS), inductively coupled plasma emission spectroscopy (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS). These methods basically require a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N21/01
Inventor 周卫东苏雪娇
Owner ZHEJIANG NORMAL UNIVERSITY
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