CN116297368A - Rare earth element detection device and detection method thereof - Google Patents

Rare earth element detection device and detection method thereof Download PDF

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Publication number
CN116297368A
CN116297368A CN202310256943.XA CN202310256943A CN116297368A CN 116297368 A CN116297368 A CN 116297368A CN 202310256943 A CN202310256943 A CN 202310256943A CN 116297368 A CN116297368 A CN 116297368A
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rare earth
lens
grating
earth element
detector
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兰慧
朱珣
邓宏涛
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Jianghan University
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Jianghan University
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    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/645—Specially adapted constructive features of fluorimeters
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    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
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    • G01N21/64—Fluorescence; Phosphorescence
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    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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    • G01J3/02—Details
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    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
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Abstract

The application discloses a rare earth element detection device and a detection method, comprising a box body, an excitation light source and a spectrum collection assembly, wherein one end of the box body is provided with a light inlet; the excitation light source is positioned outside the box body and used for irradiating the liquid to excite the rare earth elements in the liquid to emit fluorescence spectrum and enter the box body through the light inlet hole; the spectrum collecting assembly is positioned in the box body to collect fluorescence spectrum, and comprises a first lens, a rotatable grating, a reflecting mirror, a second lens and a detector which are sequentially arranged along a light path, wherein the fluorescence spectrum is collimated into parallel light through the first lens and then is emitted to the grating, the optical spectrum with different wavelengths is screened through rotating the grating and is transmitted to the second lens through the reflecting mirror to be focused, photoelectric signal conversion is carried out through the detector, and the wavelength of the optical spectrum is determined; the application adopts a small-sized low-power design, is convenient to carry and can clearly collect the luminescence peak of the sample, thereby improving the detection efficiency and accuracy.

Description

Rare earth element detection device and detection method thereof
Technical Field
The application relates to the technical field of rare earth element detection, in particular to a rare earth element detection device and a rare earth element detection method.
Background
Rare Earth Elements (REEs) are a very precious class of elements that are not available either as high performance magnets in motors and generators or as luminescent materials in LEDs and tablet computers. In order to meet the increasing demand for rare earth elements for emerging clean energy technologies, it has been found in the past that the waste liquid produced from coal ash contains many rare earth elements. Because of the low rare earth element content in these waste solutions, conventional methods cannot be used for detection and extraction.
The traditional rare earth elements are detected by adopting methods such as chemical analysis, visible spectrophotometry, inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS), X-ray fluorescence spectrometry (XRF) and the like, wherein the chemical analysis method needs reagent matching sampling to a laboratory, and other detection methods need large-scale machines such as a high-power spectrometer and the like, so that the circuit is complex, the machine is heavy, spectral line interference is serious, the method is only suitable for detecting the rare earth elements in high-purity ores, and no rare earth element detection device for waste liquid and waste water exists at present.
Disclosure of Invention
The embodiment of the application provides a rare earth element detection device and a detection method thereof, which adopt a small-sized low-power design, are convenient to carry and can clearly collect the luminescence peak of a sample, thereby improving the detection efficiency and the accuracy, and the technical scheme is as follows:
the first aspect of the application provides a rare earth element detection device, which is used for detecting rare earth elements in liquid, and comprises a box body, an excitation light source and a spectrum collection assembly, wherein one end of the box body is provided with a light inlet; the excitation light source is positioned outside the box body and used for irradiating the liquid to excite the rare earth elements in the liquid to emit fluorescence spectrum and enter the box body through the light inlet hole; the spectrum collection assembly is located in the box body to collect fluorescence spectrum, and comprises a first lens, a rotatable grating, a reflecting mirror, a second lens and a detector which are sequentially arranged along a light path, the fluorescence spectrum is collimated into parallel light through the first lens and then is emitted to the grating, the spectra with different wavelengths are screened through the rotation of the grating and transmitted to the second lens to be focused through the reflecting mirror, photoelectric signal conversion is carried out through the detector, and the wavelength of the spectrum is determined.
For example, in the rare earth element detection device provided in one embodiment, the rare earth element detection device further includes a rotating motor, and an output end of the rotating motor is connected with the grating to drive the grating to rotate so as to adjust an inclination angle of the grating.
For example, in the rare earth element detection device provided in one embodiment, the rare earth element detection device further includes a diaphragm, the diaphragm is located between the second lens and the detector, and the spectrum focused by the second lens passes through the diaphragm to reach the detector.
For example, in the rare earth element detection device provided in one embodiment, the excitation light source is an ultraviolet light emitting diode.
For example, in the rare earth element detection device provided in one embodiment, the first lens is a focusing lens, and the second lens is a hemispherical cylindrical lens.
For example, in the rare earth element detection device provided in one embodiment, the device further includes an external mobile power source, and the external mobile power source is located outside the box and is used for supplying power to the excitation light source, the motor and the detector.
For example, in the rare earth element detection device provided in one embodiment, the detector is a CCD spectrum detector, and the CCD spectrum detector converts the detected result into an external signal and uploads the external signal to the cloud system for display.
For example, in the rare earth element detecting device according to one embodiment, a grating frame for loading and fixing the grating, a mirror frame for loading and fixing the reflecting mirror, and a lens holder for loading and fixing the second lens are provided inside the case.
For example, in the rare earth element detection device provided in one embodiment, the diaphragm is a slit provided at a surface of the case opposite to the light entrance hole, and the detector is located at the slit to receive the spectrum.
A second aspect of the present application provides a detection method using the above rare earth element detection device, comprising the steps of: the liquid is irradiated by the excitation light source, rare earth elements in the excitation liquid emit fluorescence spectrums and enter the box body through the light inlet holes, the incident complex-color fluorescence divergent light is collimated into parallel light by the first lens and is emitted to the grating, the motor is started to drive the grating to rotate and adjust the inclination angle of the grating so as to screen spectrums with different wavelengths, the spectrums are transmitted to the second lens to be focused by the reflecting mirror, the spectrums reach the detector through the diaphragm, and the wavelengths of the spectrums are determined through photoelectric signal conversion, so that different rare earth elements are detected.
The rare earth element detection device and the rare earth element detection method provided by some embodiments of the application have the beneficial effects that: according to the method, the water liquid is irradiated by the excitation light source, the lanthanide in the rare earth can be excited to generate fluorescence, the fluorescence enters the light path through the first lens in a focusing way, and after the grating is subjected to light splitting, the light is finally analyzed by the detector to determine the type of the rare earth element in the water. The application adopts small-size low-power rare earth element detection device, and low energy consumption, small, light portable carry are convenient for, and the application can clearly gather the luminescence peak of sample to detection efficiency and degree of accuracy have been improved.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a rare earth element detecting device of the present application;
FIG. 2 is an optical path diagram of a rare earth element detection device of the present application;
fig. 3 is an application effect diagram of the rare earth element detection device of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The first aspect of the present application provides a rare earth element detection device for detecting a rare earth element in a liquid, and in particular, for detecting a rare earth element in a waste liquid generated from coal ash.
As shown in fig. 1-2, the device comprises a box body 10, an excitation light source 20 and a spectrum collection assembly 30, wherein a light inlet 11 is arranged at one end of the box body 10; the excitation light source 20 is located outside the case 10, and is used for irradiating the liquid to excite the rare earth element in the liquid to emit fluorescence spectrum and enter the case 10 through the light inlet hole 11; the spectrum collection assembly 30 is located in the box 10 to collect fluorescence spectra, and includes a first lens 31, a rotatable grating 32, a reflecting mirror 33, a second lens 34 and a detector 35 sequentially disposed along an optical path, the fluorescence spectra are collimated into parallel light by the first lens 31 and then are emitted to the grating 32, the spectra with different wavelengths are screened by rotating the grating 32 and transmitted to the second lens 34 via the reflecting mirror 33 to be focused, and photoelectric signal conversion is performed by the detector 35 to determine the wavelengths of the spectra.
According to the above embodiment, the application irradiates the water solution by the excitation light source 20, the lanthanide in the rare earth is excited to generate fluorescence, and the fluorescence is focused by the first lens 31 into the optical path, and after the grating 32 performs light splitting, the light is finally analyzed by the detector 35 to determine the type of the rare earth element in the water. The application adopts small-size low-power rare earth element detection device, low power consumption, small volume, portability and portability, utilizes excitation light source 20 to irradiate liquid so as to excite rare earth element emission fluorescence spectrum in the liquid, thereby detecting lanthanide rare earth materials such as Tb, eu, sm, dy and the like in the liquid.
Fig. 3 is a diagram showing the practical effect of detecting rare earth elements in waste liquid by the rare earth element detection device of the present application, when the excitation light source 20 irradiates the water solution, the lanthanoid element in the rare earth is excited to generate fluorescence, specifically, when the ultraviolet light emitting diode of 280nm is used for irradiation, terbium, dysprosium, europium and samarium samples can emit unique colors: wherein Tb is 3+ Is green and Dy 3+ Is blue and Eu 3+ Is red, sm 3+ The fluorescent color of the different rare earth elements is readily visible to the naked eye as a qualitative indication of lanthanide sensitization by the fluorescent color of the rare earth element.
Wherein the box body 10 is a dark box to provide dark field environment, so as to facilitate observation of fluorescent colors of different rare earth elements.
In addition, as the rare earth element luminous line is simple and has less interference, the rare earth element detection device can not destroy a sample, and the repeated measurement is carried out, thereby avoiding environmental pollution; the rare earth element detection device has a waterproof function, and can directly utilize the fluorescence intensity emitted by the rare earth element in the liquid to perform the test without a reagent.
For example, in the rare earth element detection device provided in one embodiment, the rare earth element detection device further includes a rotating motor, where an output end of the rotating motor is connected to the grating 32, and drives the grating 32 to rotate, so as to adjust an inclination angle of the grating 32.
For example, in the rare earth element detection device provided in one embodiment, the rare earth element detection device further includes a diaphragm 37, the diaphragm 37 is located between the second lens 34 and the detector 35, and the spectrum focused by the second lens 34 passes through the diaphragm 37 to reach the detector 35.
For example, in one embodiment, the rare earth element detection device is provided, and the excitation light source 20 is a 280nm ultraviolet light emitting diode.
Specifically, the excitation light source 20 is two UVLEDs that draw close to each other, and the power of the two UVLEDs is 1mW, and compared with the conventional detection method that needs a high-power laser source for detection, the detection method has the advantages of low energy consumption, small volume, portability, and convenience in carrying and carrying.
The two UVLEDs are arranged close to each other, so that laser focusing is aligned to the liquid, and elements with specific fluorescence spectrums in the liquid are excited and detected. Two UVLEDs are arranged above the light inlet 11, and when the excitation light source 20 irradiates the water solution, lanthanide elements in the rare earth are excited to generate fluorescence.
For example, in the rare earth element detection device provided in one embodiment, the first lens 31 is a focusing lens, and the second lens 34 is a hemispherical cylindrical lens.
According to the above embodiment, the second lens 34 is a hemispherical cylindrical lens, and the hemispherical cylindrical lens has a cylindrical surface, so that the incident light can be focused in a certain dimension, and the image can be stretched, and the focal length of the cylindrical lens can be negative or positive, so that the direction of the light can be better adjusted and controlled.
For example, in one embodiment, the rare earth element detection device further includes an external mobile power source, which is located outside the case 10 and is used for supplying power to the excitation light source 20, the motor 36 and the detector 35.
For example, in the rare earth element detection device provided in one embodiment, the detector 35 is a CCD spectrum detector, and the CCD spectrum detector converts the detected result into an external signal and uploads the external signal to the cloud system for display.
For example, in the rare earth element detecting device according to one embodiment, a grating frame for loading and fixing the grating 32, a mirror frame for loading and fixing the reflecting mirror 33, and a lens holder for loading and fixing the second lens 34 are provided inside the case 10.
According to the above embodiment, the grating frame for loading and fixing the grating 32, the mirror frame for loading and fixing the reflecting mirror 33, and the lens seat for loading and fixing the second lens 34 are disposed inside the case 10, so that the optical component is conveniently and rapidly mounted and dismounted, and the optical component is stably disposed inside the case 10 without shaking, and the stable optical path is ensured.
For example, in the rare earth element detection device provided in one embodiment, the diaphragm 37 is a slit provided at a surface of the case 10 opposite to the light entrance hole 11, and the detector 35 is located at the slit to receive a spectrum.
A second aspect of the present application provides a detection method using the above rare earth element detection device, comprising the steps of: the liquid is irradiated by the excitation light source 20, the rare earth elements in the excitation liquid emit fluorescence spectrums and enter the box 10 through the light inlet 11, the incident multi-color fluorescence divergent light is collimated into parallel light by the first lens 31 and is emitted to the grating 32, after the multi-color light passes through the grating 32, spectral lines with different wavelengths appear at different positions to form spectrums, the motor 36 is started to drive the grating 32 to rotate and adjust the inclination angle of the grating 32 to screen the spectrums with different wavelengths, the spectrums are transmitted to the second lens 34 through the reflecting mirror 33 to be focused, the spectrums reach the detector 35 through the diaphragm 37, and the wavelengths of the spectrums are determined through photoelectric signal conversion, so that the different rare earth elements are detected.
Although embodiments of the present application have been disclosed above, it is not limited to the details and embodiments shown, it is well suited to various fields of use for the application, and further modifications may be readily made by those skilled in the art without departing from the general concepts defined by the claims and the equivalents thereof, and the application is therefore not limited to the specific details and illustrations shown and described herein.

Claims (10)

1. A rare earth element detecting apparatus for detecting a rare earth element in a liquid, comprising:
the box body is provided with a light inlet at one end;
the excitation light source is positioned outside the box body and used for irradiating the liquid to excite the rare earth elements in the liquid to emit fluorescence spectrum and enter the box body through the light inlet hole;
the optical spectrum collecting assembly is positioned in the box body to collect fluorescence spectra, and comprises a first lens, a rotatable grating, a reflecting mirror, a second lens and a detector which are sequentially arranged along an optical path, wherein the fluorescence spectra are collimated into parallel light through the first lens and then emitted to the grating, the spectra with different wavelengths are screened through the rotation of the grating and transmitted to the second lens for focusing through the reflecting mirror, photoelectric signal conversion is carried out through the detector, and the wavelength of the spectra is determined.
2. The rare earth element detecting apparatus according to claim 1, further comprising a rotating electric machine, wherein an output end of the rotating electric machine is connected to the grating to rotate the grating so as to adjust an inclination angle of the grating.
3. The rare earth element detection apparatus according to claim 1, further comprising a diaphragm located between the second lens and the detector, wherein a spectrum focused via the second lens passes through the diaphragm to reach the detector.
4. The rare earth element detection device according to claim 1, wherein the excitation light source is an ultraviolet light emitting diode.
5. The rare earth element detection device according to claim 1, wherein the first lens is a focusing lens and the second lens is a hemispherical cylindrical lens.
6. The rare earth element detection device according to claim 2, further comprising an external mobile power supply located outside the case for supplying power to the excitation light source, the motor, and the detector.
7. The rare earth element detection device according to claim 6, wherein the detector is a CCD spectrum detector, and the CCD spectrum detector converts the detected result into an external signal and uploads the external signal to the cloud system for display.
8. The rare earth element detecting apparatus according to claim 7, wherein a grating holder for holding and fixing the grating, a mirror frame for holding and fixing the reflecting mirror, and a lens holder for holding and fixing the second lens are provided inside the case.
9. A rare earth element detection apparatus according to claim 3, wherein said diaphragm is a slit provided at a surface of said casing opposite to said light entrance hole, and said detector is located at said slit to receive the spectrum.
10. A detection method according to any one of claims 1 to 9, characterized by comprising the steps of:
the liquid is irradiated by the excitation light source, rare earth elements in the excitation liquid emit fluorescence spectrums and enter the box body through the light inlet holes, the incident complex-color fluorescence divergent light is collimated into parallel light by the first lens and is emitted to the grating, the motor is started to drive the grating to rotate and adjust the inclination angle of the grating so as to screen spectrums with different wavelengths, the spectrums are transmitted to the second lens to be focused by the reflecting mirror, the spectrums reach the detector through the diaphragm, and the wavelengths of the spectrums are determined through photoelectric signal conversion, so that different rare earth elements are detected.
CN202310256943.XA 2023-03-16 2023-03-16 Rare earth element detection device and detection method thereof Pending CN116297368A (en)

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