CN213516884U

CN213516884U - Optical fiber type Raman spectrum material component detection system

Info

Publication number: CN213516884U
Application number: CN202022444202.9U
Authority: CN
Inventors: 范玉佳
Original assignee: Shenzhen Xinyan Biotechnology Co ltd
Current assignee: Shenzhen Xinyan Biotechnology Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-06-22
Anticipated expiration: 2030-10-28

Abstract

The utility model relates to a material composition detection area specifically provides an optical fiber type Raman spectrum material composition detecting system, include: first cavity, second cavity, third cavity, optic fibre, laser instrument, spectrum appearance can realize the determinand function such as pound to pieces, extract, purify, concentrate, detect, can realize convenient, the witnessed inspections of material composition. In addition, the invention uses the conical groove to gather the concentrated solution of the object to be measured, reduces the waste of the concentrated solution, and uses the conical groove to gather the Raman signal, thereby enabling more Raman signals to be coupled into the probe end of the optical fiber, and improving the Raman signal intensity measured by the spectrometer. Therefore, the invention not only applies the optical fiber to reduce the external interference, but also improves the detection sensitivity.

Description

Optical fiber type Raman spectrum material component detection system

Technical Field

The utility model relates to a material composition detection area, concretely relates to optical fiber type Raman spectrum material composition detecting system.

Background

The detection of material components, especially the detection of pesticides, has important significance in the aspects of environmental problems and food safety problems. The existing material component detection is generally completed step by step in a laboratory according to certain steps, and all devices are separated, so that the field rapid detection of the material components cannot be realized. In addition, the traditional Raman signal detection is based on an external light path, the equipment is complex, and the measurement result is easily interfered by the outside world.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides an optical fiber type raman spectrum material composition detecting system, include: the device comprises a first chamber, a second chamber, a third chamber, an optical fiber, a laser and a spectrometer, wherein a mashing part and an extracting device are arranged in the first chamber and are used for mashing an object to be detected and extracting the object to be detected; a purifying device and a concentrating device are arranged in the second chamber and used for obtaining purified liquid of the object to be detected; the top of the first chamber is provided with a feeding port, the second chamber is arranged on the side surface of the first chamber, a first movable partition plate is arranged between the second chamber and the first chamber, the first partition plate is communicated with or separates the first chamber and the second chamber, the bottoms of the first chamber and the second chamber are respectively provided with a first outlet and a second outlet, valves are arranged on the first outlet and the second outlet, the third chamber is tubular, the third chamber is arranged on the side surface of the second chamber, a second movable partition plate is arranged between the third chamber and the second chamber, the second partition plate is communicated with or separates the second chamber and the third chamber, the side surface of the second partition plate is provided with an opening, the optical fiber passes through the top surface of the third chamber, the probe end of the optical fiber is arranged in the third chamber, the interface end of the optical fiber is arranged outside the third chamber, the laser emits laser and is coupled into the interface end of the optical fiber, the spectrometer receives a raman scattered signal emitted from the interface end of the optical fiber.

Furthermore, the filter also comprises a first filter screen which is arranged at the first clapboard.

Still further, still include the second filter screen, the second filter screen sets up in second baffle department.

Further, at the probe end of the optical fiber, noble metal particles are provided at the end of the optical fiber.

Further, the noble metal particles are gold or silver.

Further, the noble metal particles are round or square.

Further, the noble metal particles have a size greater than 20 nanometers and less than 100 nanometers.

Further, a tapered groove is formed in the third chamber, and the optical fiber extends along the axis of the concave part of the tapered groove.

Further, the side surface of the tapered recess is provided with a noble metal layer.

Further, the probe tip is spaced from the sides of the tapered recess by less than 1 micron.

The utility model has the advantages that: the utility model provides an optical fiber type Raman spectrum material composition detection system, include: first cavity, second cavity, third cavity, optic fibre, laser instrument, spectrum appearance can realize the determinand function such as pound to pieces, extract, purify, concentrate, detect, can realize convenient, the witnessed inspections of material composition. In addition, the invention uses the conical groove to gather the concentrated solution of the object to be measured, reduces the waste of the concentrated solution, and uses the conical groove to gather the Raman signal, thereby enabling more Raman signals to be coupled into the probe end of the optical fiber, and improving the Raman signal intensity measured by the spectrometer. Therefore, the invention not only applies the optical fiber to reduce the external interference, but also improves the detection sensitivity.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a fiber Raman spectroscopy material composition detection system.

In the figure: 1. a first chamber; 2. a second chamber; 3. a third chamber; 4. an optical fiber; 10. a feeding port; 11. a first outlet; 12. a first separator; 21. a second outlet; 22. a second separator; 31. a tapered recess; 41. a probe end; 42. an interface end.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.

Example 1

The utility model provides an optical fiber type Raman spectrum material composition detection system, including first cavity 1, second cavity 2, third cavity 3, optic fibre 4, laser instrument, spectrum appearance. A mashing part and an extracting device are arranged in the first chamber 1 and are used for mashing the object to be tested and extracting the object to be tested. A purifying device and a concentrating device are arranged in the second chamber 2 for obtaining the purified liquid of the object to be detected. As shown in fig. 1, a feeding port 10 is provided at the top of the first chamber 1. The second chamber 2 is arranged at the side of the first chamber 1, a first partition plate 12 which can be displaced is arranged between the second chamber 2 and the first chamber 1, and the first partition plate 12 is communicated with or separates the first chamber 1 and the second chamber 2. The processed sample in the first chamber 1 can enter the second chamber 2 through the first partition 12. The bottom of the first chamber 1 and the bottom of the second chamber 2 are respectively provided with a first outlet 11 and a second outlet 21, and the first outlet 11 and the second outlet 21 are respectively provided with a valve for discharging waste residues or waste liquid treated by the first chamber 1 and the second chamber 2. The third chamber 3 is tubular, the third chamber 3 is arranged on the side surface of the second chamber 2, a second partition plate 22 capable of being displaced is arranged between the third chamber 3 and the second chamber 2, and the second partition plate 22 is communicated with the second chamber 2 and the third chamber 3. The processed sample of the second chamber 2 can enter the third chamber 3 through the second partition 22. On the opposite side of the second partition 22, the side of the third chamber 3 is provided with an opening for discharging the sample after the test. The optical fiber 4 penetrates through the top surface of the third chamber 3, the probe end 41 of the optical fiber 4 is arranged in the third chamber 3, the interface end 42 of the optical fiber 4 is arranged outside the third chamber 3, the laser emits laser light and is coupled into the interface end 42 of the optical fiber 4, and the spectrometer receives Raman scattering signals emitted from the interface end 42 of the optical fiber 4. And determining the components of the material to be detected according to the Raman spectrum signals obtained by the spectrometer.

The invention can realize the functions of mashing, extracting, purifying, concentrating, detecting and the like of the substance to be detected, and can realize convenient and on-site detection of material components. The invention uses the optical fiber 4, reduces the external interference and has simple equipment.

Furthermore, the filter further comprises a first filter screen, and the first filter screen is arranged at the first partition plate 12. When the first partition 12 is opened, the sample in the first chamber 1 needs to pass through the first screen to enter the second chamber 2, so that the material residue can be filtered better.

Further, a second filter screen is included, and the second filter screen is disposed at the second partition 22. When the second partition 22 is opened, the sample in the second chamber 2 needs to pass through the second filter screen to enter the third chamber 3, and thus, the material residue can be better filtered.

Example 2

In example 1, noble metal particles were provided on the end of the core of the optical fiber 4 at the probe end 41 of the optical fiber 4. The noble metal particles are gold or silver. The noble metal particles are round or square. The size of the noble metal particles is greater than 20 nanometers and less than 100 nanometers. Thus, surface plasmon resonance is formed at the probe end 41, and a strong electric field is excited in the vicinity of the noble metal particles, thereby realizing surface-enhanced raman scattering for the object to be measured. Compared with Raman scattering, the surface enhanced Raman scattering has stronger signal intensity, and can realize material component analysis with higher sensitivity.

Example 3

In addition to embodiment 2, a tapered groove 31 is provided in the third chamber 3, and the optical fiber 4 extends in the recess axis direction of the tapered groove 31. During measurement, the analyte concentrate flows into the tapered groove 31, so that the waste of the analyte concentrate is reduced.

Further, the side surfaces of the tapered recess 31 are provided with a noble metal layer. The probe tip 41 is spaced less than 1 micron from the sides of the conical recess 31. Thus, the tapered groove 31 converges the raman signal of the analyte, so that more raman signals are coupled into the probe end 41 of the optical fiber 4, the intensity of the raman signal measured by the spectrometer is improved, and the sensitivity of detecting the components of the analyte is improved.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. An optical fiber type Raman spectrum material component detection system is characterized by comprising: the device comprises a first chamber, a second chamber, a third chamber, an optical fiber, a laser and a spectrometer, wherein a mashing part and an extracting device are arranged in the first chamber and are used for mashing an object to be detected and extracting the object to be detected; a purifying device and a concentrating device are arranged in the second chamber and used for obtaining purified liquid of the object to be detected; a feeding port is arranged at the top of the first chamber, the second chamber is arranged on the side surface of the first chamber, a first movable partition plate is arranged between the second chamber and the first chamber, the first partition plate is communicated with or separates the first chamber and the second chamber, a first outlet and a second outlet are respectively arranged at the bottoms of the first chamber and the second chamber, valves are arranged on the first outlet and the second outlet, the third chamber is tubular, the third chamber is arranged on the side surface of the second chamber, a second movable partition plate is arranged between the third chamber and the second chamber, the second partition plate is communicated with or separates the second chamber and the third chamber, an opening is arranged on the side surface of the third chamber on the opposite side of the second partition plate, and an optical fiber passes through the top surface of the third chamber, the probe end of the optical fiber is arranged in the third cavity, the interface end of the optical fiber is arranged outside the third cavity, the laser emits laser and is coupled to the interface end of the optical fiber, and the spectrometer receives Raman scattering signals emitted from the interface end of the optical fiber.

2. The fiber-optic raman spectroscopy material composition detection system of claim 1, wherein: still include first filter screen, first filter screen set up in first baffle department.

3. The fiber-optic raman spectroscopy material composition detection system of claim 2, wherein: still include the second filter screen, the second filter screen set up in second baffle department.

4. The fiber-optic raman spectroscopy material composition detection system of any one of claims 1 to 3, wherein: and noble metal particles are arranged at the end part of the fiber core of the optical fiber at the probe end of the optical fiber.

5. The fiber-optic raman spectroscopy material composition detection system of claim 4, wherein: the noble metal particles are gold or silver.

6. The fiber-optic raman spectroscopy material composition detection system of claim 5, wherein: the noble metal particles are round or square.

7. The fiber-optic raman spectroscopy material composition detection system of claim 6, wherein: the size of the noble metal particles is greater than 20 nanometers and less than 100 nanometers.

8. The fiber-optic raman spectroscopy material composition detection system of claim 7, wherein: a conical groove is arranged in the third chamber, and the optical fiber extends along the axis direction of a concave part of the conical groove.

9. The fiber-optic raman spectroscopy material composition detection system of claim 8, wherein: and a precious metal layer is arranged on the side surface of the conical groove.

10. The fiber-optic raman spectroscopy material composition detection system of claim 9, wherein: the distance between the probe end and the side surface of the conical groove is less than 1 micron.