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Method and device for online detecting element components of liquid sample

A liquid sample and element composition technology, which is applied in the direction of measuring devices, analytical materials, material excitation analysis, etc., can solve problems such as technical difficulties in LIBS detection, sensitivity and stability of LIBS water detection, etc.

Pending Publication Date: 2018-04-17
QINGDAO UNIV
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Problems solved by technology

However, when applied to the detection of water body components, due to the influence of the matrix effect and the constraints of related technical characteristics, the sensitivity and stability of LIBS water body detection are affected.
Therefore, the online and on-site LIBS detection technology of metal elements in water body has encountered difficulties.

Method used

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  • Method and device for online detecting element components of liquid sample

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Embodiment Construction

[0007] The present invention is carried out as follows. The liquid sample is injected online into the sample inlet (2) of the injection tank through the peristaltic pump (1), so that the liquid sample flows through the flow water storage tank (3) above the microporous spray sheet (5) at a uniform speed, and the flow water storage tank (3) A part of the liquid sample in ) is under the action of the liquid tension and the high-frequency vibration of the piezoelectric ceramic sheet (7), the small droplet sample is ejected from the injection hole (6) from the other side of the microporous ejection sheet (5), Dense droplets moving at high speed are formed. The remaining sample is drained through the drain hole (4). A diversion exhaust pipe (8), a buffer waste liquid bottle (9) and a fan (10) are selected to form a diversion device. Its function is to generate air flow at the mouth of the diversion exhaust pipe (8) through the fan (10), so that the dense droplet sample is drawn in...

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Abstract

The invention relates to a method and a device for online detecting element components of a liquid sample. The device is characterized in that the liquid sample is injected into a sample feeding tank(2) by a creepage pump (1); the sample flows through a water storage tank (3) above a microporous spraying sheet (5), and one part of liquid sample is sprayed out via spraying holes (6) in the microporous spraying sheet (5) under the high-frequency vibration function of liquid tension and a piezoelectric ceramic sheet (7), so as to form dense liquid droplets which can move at high speed; the liquid droplet sample is maintained in a stable cylinder way by a fan (10) and a flow guide and air exhaust pipe (8); a laser pulse which is transmitted by a laser device (11) is focused by a focusing lensgroup (12), and breaks down the dense liquid droplets to produce plasma; a plasma radiation signal is collected by a lens group (13), an optical fiber (14) and a spectrometer (15); the element components of the sample are analyzed according to the obtained spectrum signal. The device and the method can be applied to the high-precision detection in the fields of ocean, chemical engineering, foods,medicines, science and research, water pollution and the like.

Description

technical field [0001] The invention is suitable for continuous on-line detection of metal components in water bodies by laser-induced breakdown spectroscopy technology. This technology realizes real-time sampling through continuous online microhole jet-assisted sampling device, and uses laser-induced breakdown spectroscopy technology to achieve highly sensitive qualitative or quantitative detection of elemental components in water. This method is expected to be applied in the fields of water environment monitoring and natural water scientific investigation. Background technique [0002] Laser-induced breakdown spectroscopy (LIBS) uses a focused laser pulse to break down the sample to generate a transient plasma. By detecting the characteristic spectrum emitted by the elements in the sample plasma, the qualitative analysis of the elemental composition in the sample is realized. quantitative analysis. This technology has the characteristics of no need for sample pretreatmen...

Claims

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Application Information

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IPC IPC(8): G01N21/63G01N21/01
CPCG01N21/01G01N21/63
Inventor 钟石磊生鹏鹏孙欣
Owner QINGDAO UNIV
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