Device for detecting content of suspended lead in air

A technology of lead content and air, applied in the field of optics, can solve problems such as unsatisfactory results, poor repeatability and accuracy, and failure to monitor lead content, etc., to achieve high system reliability and stability, simple operation, simple and stable structure Effect

Inactive Publication Date: 2009-09-30
HANGZHOU DIANZI UNIV
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Problems solved by technology

Atomic absorption spectrometry has the characteristics of high sensitivity, good selectivity, and good stability, but it also has many shortcomings: 1) severe chemical interference, the results are not satisfactory; 2) poor repeatability and accuracy; Pre-treatment; 4) Residual substances should be removed after the test is completed
However, the traditional atomic fluorescence spectrometer has a complex structure, requires an atomization device, and requires pretreatment of the sample
None of the above methods can continuously monitor the suspended lead content in the air

Method used

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  • Device for detecting content of suspended lead in air

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with drawings and embodiments.

[0020] Such as figure 1 As shown, a device for detecting suspended lead content in air includes a laser 1, a laser frequency doubler 2, a single-sided mirror 3, a double-sided mirror 4, a concave mirror 5, a Newtonian telescope 6, an optical filter 7, a focusing Lens 8 , spectrum detection instrument 9 , information processing and display unit 10 . The laser 1, the laser frequency doubler 2 and the single-sided reflector 3 are sequentially placed on the outgoing light path of the light source beam, and the included angle between the reflective surface of the single-sided reflector 3 and the light source beam is 45°. The double-sided mirror 4 is arranged on the optical path of the light beam reflected by the single-sided mirror 3 , and is arranged parallel to the single-sided mirror 3 . Newtonian telescope 6 and concave reflector 5 are respectively arranged on the both...

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Abstract

The invention relates to a device for detecting the content of suspended lead in the air. The prior requires atomizing a sample first and is complex in structure and inconvenient in use. In the device, a laser, a laser frequency multiplier and a single-side reflector are placed on an emitting light path of a light beam of a light source sequentially, a double-side reflector is arranged on a light path of a light beam reflected by the single-side reflector and parallel to the single-side reflector, and a Newtonian telescope and a concave mirror are arranged on two sides of the double-side reflector respectively. A filter, a focusing lens and a spectrum detection instrument are sequentially placed on a light path of a light beam reflected by the other reflecting surface of the double-side reflector, and an information processing and displaying unit is electrically connected with the spectrum detection instrument. The device is simple in structure and high in fluorescence unitization rate, saves sample pretreatment and part atomization, and can perform continuous in-place measurement.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a device for detecting lead content in the air, which is mainly used for detecting the content of suspended lead in the air. technical background [0002] Lead is a non-essential substance for the human body, and it is easy to accumulate in the human body, but not easy to excrete. Lead in the atmosphere mainly comes from two aspects: natural factors and human factors. Natural factors are mainly volcanic eruptions, natural dust from sandy soil, and organic lead compounds synthesized by microorganisms; human factors are mainly exhaust gases from automobiles and factories, lead-containing welding materials and paints, and lead-containing waste liquid from battery production. Lead exists in the atmosphere in the following forms: simple lead, inorganic lead such as lead oxide, and organic lead such as tetraethyl lead. They are usually absorbed by particulate matter floating in the at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01J3/18G01J3/12G01J3/28G02F1/35
Inventor 刘英明高秀敏王健顾海涛李涉英
Owner HANGZHOU DIANZI UNIV
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