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Online analyzer for uranium in water based on fluorescence method

A fluorescence method and analyzer technology, applied in the direction of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problem that the environmental governance and management departments cannot provide more real-time and reliable data in the detection of uranium content, and the uranium content in the discharge port cannot be monitored online. The results cannot be communicated in real time, etc., to achieve the effects of improved repeatability, reduced errors, and high sensitivity

Active Publication Date: 2021-03-16
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing detection process is based on manual detection, the detection cycle is long, and it is impossible to monitor the uranium content in the discharge outlet or self-identified water body online. Manual operation is easy to introduce human errors, and the detection results cannot be communicated to the management department in real time.
Therefore, conventional laboratory uranium content detection cannot provide more real-time and reliable data for environmental governance and management departments

Method used

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  • Online analyzer for uranium in water based on fluorescence method

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Embodiment 1

[0048] An on-line analyzer for uranium in water based on the fluorescence method. Its high-precision syringe pump has a range of 10 mL and an accuracy of 10 μL; the precision of the precision metering pump is 5 μL; the excitation light source is an ultraviolet light-emitting diode with a center wavelength of 280 nm and a pulse current of 1000 mA. The divergence angle is 60°, the LED power supply is 50Hz, and the duty ratio is 1:10; the photoelectric conversion element is a photomultiplier tube, the central wavelength of the filter is 520nm, and the bandwidth is 10nm; the fluorescence collection method is pulse delay collection, and the delay time is 30μs. The operation steps of the instrument are as follows:

[0049] 1) The emptying valve (102) is switched to the air end, and 1mL of air is extracted first; the emptying valve (102) is switched to a straight-through flow path, the exhaust valve (104) is switched to the direction of the sample pool, and the high-precision syringe...

Embodiment 2

[0056] An on-line analyzer for uranium in water based on the fluorescence method. Its high-precision syringe pump has a range of 5mL and an accuracy of 5μL; the precision of the precision metering pump is 1μL; the excitation light source is an ultraviolet light-emitting diode with a center wavelength of 330nm and a pulse current of 300mA. The divergence angle is 70°, the LED power supply is 20Hz, and the duty ratio is 1:5; the photoelectric conversion element is a silicon photocell, the filter center wavelength is 530nm, and the bandwidth is 20nm; the fluorescence collection method is pulse delay collection, and the delay time is 20μs . The operation steps of the instrument are as follows:

[0057] 1) The emptying valve (102) is switched to the air end, and 1mL of air is extracted first; the emptying valve (102) is switched to a straight-through flow path, the exhaust valve (104) is switched to the direction of the sample pool, and the high-precision syringe pump (101) starts ...

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Abstract

The invention relates to the technical field of environment-friendly online monitoring equipment, and particularly discloses an online analyzer for uranium in water based on a fluorescence method, which adopts a high-precision injection pump and an air isolation mode to improve the liquid volume control precision; a fluorescence enhancer and a standard solution are conveyed by a single precision metering pump. Cross contamination between solutions is avoided, errors caused by manual operation are reduced, and detection repeatability is improved. The fluorescence method is adopted as a detection principle, the sensitivity is high, the selectivity is good, the linear range is wide, the number of automatic operation steps is small, uranium standard solutions are used for correction each time,and the quantitative accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of online monitoring equipment for environmental protection, and in particular relates to an online monitoring instrument for uranium in water. Background technique [0002] Uranium is an important nuclear energy resource in my country and an important strategic reserve resource. In the production and processing of natural uranium, uranium mining and smelting plants play an important role. Its function is to extract uranium from ore, and carry out steps such as precipitation, separation, and purification to provide raw materials for downstream uranium products with higher purity. With the rapid development of my country's nuclear power, military and medical fields, the demand for uranium mining and uranium product processing is increasing day by day, and the accompanying uranium pollution in environmental water, air, soil and waste is becoming more and more important. subject. The waste water discharged by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/64
Inventor 龚明明陈士恒孙雪云郭国龙丁海云黄蔷薇杨丹丹
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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