Liquid chromatography ultraviolet diode array detector

Abstract

The utility model discloses a liquid chromatogram ultraviolet diode array detector, which belongs to the technical field of liquid chromatogram analysis and is characterized in that a deuterium lamp is used for emitting ultraviolet visible light, the deuterium lamp is arranged at the focus of a first off-axis parabolic mirror, the first off-axis parabolic mirror is used for collimating the ultraviolet visible light, a sample cell is arranged on the light path of the collimated light, and the sample cell is arranged on the light path of the collimated light. The two sides of a light inlet hole and a light outlet hole of the sample pool are each provided with an optical slit, the optical fiber coupler is connected with an optical fiber, collimated light sequentially penetrates through the optical slits, the sample pool and the optical slits and enters the optical fiber through the optical fiber coupler, and emergent light of the optical fiber is reflected to the second off-axis parabolic mirror through the slits. The second off-axis parabolic mirror is used for collimating incident light into the plane holographic diffraction reflection type grating, the plane holographic diffraction reflection type grating is used for dividing incident synthesized light into linear array light, and the separated linear array light with different wavelengths is imaged on the linear array CCD detector through the spherical mirror; and the linear array CCD detector is arranged at the focus of the spherical reflector and is used for detecting the light intensity of the linear array light.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid chromatography analysis, and specifically relates to a high-resolution liquid chromatography ultraviolet diode array detector based on optical fiber transmission. Technical Background

[0002] The development of photodiode array detectors is the most important advancement in high performance liquid chromatography technology in the past decade. In 1975, Talmi first reported the use of diode array systems, and later Yates, Kuwana, Milano and others further developed the technology. In 1982, Hewlett-Packard launched the world's first commercial diode array detector HP1040A, which was designed based on the first photodiode array spectrophotometer technology developed by the company. Since then, liquid chromatography analysis has achieved many major developments. More information can be obtained in one injection, and data processing is faster. It can not only overcome the shortcomings of ordinary ultraviolet visible absorption detectors, but also obtain three-dimensional spectral chromatograms of chromatographic separation components, providing analysts with very rich qualitative and quantitative information.

[0003] Liquid chromatography UV detector is a detector designed based on the principle that solute molecules absorb UV light, that is, when part of the UV light beam passes through the flow cell, if the mobile phase absorbs light, then its absorbance is proportional to the concentration of the absorbing component and the optical path length of the flow cell. At present, UV-visible detector is the most widely used detector. It has the advantages of high sensitivity, low noise, wide linear range, insensitivity to flow rate and temperature, etc. It can be used for analysis, preparative chromatography and microanalysis. However, with the increase in the number of sample types detected by existing liquid chromatograph UV detectors, the detection of similar samples has also gradually increased. The accuracy of the equipment with an optical resolution accuracy of ±2nm on the market is no longer able to distinguish similar types of samples. Utility Model Content

[0004] The utility model aims to provide an optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector, which solves the disadvantage of low optical resolution of the current liquid chromatography ultraviolet diode array detector.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] A liquid chromatography ultraviolet diode array detector comprises a deuterium lamp, a first off-axis parabolic reflector, a sample cell, an optical slit, a fiber coupler, an optical fiber, a second off-axis parabolic reflector, a plane holographic diffraction reflective grating, a spherical reflector and a linear array CCD detector, wherein the deuterium lamp is used to emit ultraviolet visible light, the deuterium lamp is placed at the focus of the first off-axis parabolic reflector, the first off-axis parabolic reflector is used to collimate the ultraviolet visible light, the sample cell is placed on the optical path of the collimated light, an optical slit is respectively arranged on both sides of the light entrance hole and the light exit hole of the sample cell, and the fiber coupler is used to emit ultraviolet visible light. Connected to the optical fiber, the collimated light passes through the optical slit, the sample cell and the optical slit in sequence and enters the optical fiber through the optical fiber coupler. The outgoing light of the optical fiber is reflected by the slit to the second off-axis parabolic reflector. The second off-axis parabolic reflector is used to collimate the incident light into the plane holographic diffraction reflection grating. The plane holographic diffraction reflection grating is used to separate the incident synthetic light into linear array light. The separated linear array lights of different wavelengths are imaged onto the linear array CCD detector through the spherical reflector. The linear array CCD detector is placed at the focus of the spherical reflector and is used to detect the light intensity of the linear array light.

[0007] The size of the slit is 3mm×25um, the distance from the slit to the second off-axis parabolic reflector is 39.65mm, the focal length of the second off-axis parabolic reflector is 40mm, the incident angle of the incident principal ray of the second off-axis parabolic reflector is 11.5°, the distance from the second off-axis parabolic reflector to the plane holographic diffraction reflective grating is 40mm, the incident angle of the incident principal ray of the plane holographic diffraction reflective grating is 24.8°, the exit angle of the exit principal ray of the plane holographic diffraction reflective grating is 5.2°, the distance from the plane holographic diffraction reflective grating to the spherical reflector is 35mm, the angle of the incident light of the spherical reflector is 18.2°, the distance from the spherical reflector to the linear array CCD detector is 47.8mm, the angle between the normal of the linear array CCD detector and the incident principal ray is less than or equal to 10°, and the number of pixels of the linear array CCD detector is 2048.

[0008] The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a filter, a filter baffle and a control motor. The filter is mounted on the filter baffle, and the filter baffle is mounted on the control motor. The control motor drives the filter to enter and exit the light path between the deuterium lamp and the first off-axis parabolic reflector.

[0009] The fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a shell, a first dark box and a second dark box. The deuterium lamp and the first off-axis parabolic reflector are installed in the first dark box, and the off-axis parabolic reflector, the plane holographic diffraction reflection grating, the spherical reflector and the linear array CCD detector are installed in the second dark box. The first dark box and the second dark box are placed in the shell cavity. The light exit hole on the first dark box is aligned with the central axis of the optical slit at the light entrance hole of the sample pool. One end of the fiber optic coupler is connected to the optical slit at the light exit hole of the sample pool, and the other end is connected to the slit on the first dark box through the optical fiber.

[0010] The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a heat dissipation pipeline and a heat dissipation fan. The heat dissipation pipeline is fixed in the inner cavity of the shell, the heat dissipation fan is fixed on the shell, and the first dark box is connected to the heat dissipation fan through the heat dissipation pipeline.

[0011] The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a photodiode, which is placed in the first dark box and is used to detect the luminescence spectrum and luminescence intensity of the deuterium lamp.

[0012] The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a leakage protection resistor, which is used to determine whether the sample pool is leaking.

[0013] The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a power switch, a power indicator light and a status indicator light.

[0014] The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a deuterium lamp control board, a linear array CCD control board and a main control board. The deuterium lamp control board is connected to the deuterium lamp to provide a high-voltage power supply for lighting the deuterium lamp and a regulated power supply for the deuterium lamp to continuously emit light. The linear array CCD control board is connected to the linear array CCD detector to supply power to the linear array CCD detector and read the electrical signal of the linear array CCD detector at the same time. The main control board is respectively connected to the deuterium lamp control board, a cooling fan, a photodiode, a leakage protection resistor, the linear array CCD control board, a power switch, a power indicator light, a status indicator light and a control motor to control the operation of corresponding devices.

[0015] Compared with the prior art, the utility model has the following advantages: (1) the resolution of the liquid chromatography ultraviolet diode array detector reaches ±0.44nm through the selection, design and optimization of devices; (2) the utility model reduces the light loss, enhances the anti-interference ability, improves the light utilization rate, and makes the arrangement of the various components of the system more flexible through the coordination of the fiber coupler and the optical fiber, and the setting of the first dark box and the second dark box; (3) a plane grating is used to reduce the cost, and the off-axis parabolic mirror light path is used for the collimated light path. The off-axis parabolic reflector can focus parallel light beams or collimated point light sources without dispersion. Its off-axis design can separate the focus from the light path, thereby improving the light intensity utilization rate. A linear array CCD detector is used, which can measure the light intensity of wavelengths within the entire ultraviolet-visible light spectrum at one time, and can detect the substance concentration of samples with multiple mixed components at one time, and can meet the needs of three-dimensional (time, wavelength, light intensity) holographic detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram of the optical path structure of the fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector involved in Example 1.

[0017] Figure 2 Schematic diagram of the structural principle of the spectrometer involved in Example 1.

[0018] Figure 3 This is the spot diagram at 200 nm before optimization in Example 1.

[0019] Figure 4 Spot diagram at 200nm after optimization in Example 1.

[0020] Figure 5 This is a mechanical structure diagram of the fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector involved in Example 1.

[0021] Figure 6 for Figure 5 Middle part structure diagram.

[0022] Figure 7 This is a schematic diagram of the structural principle of the fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector involved in Example 1. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figure 1As shown, a liquid chromatography ultraviolet diode array detector involved in this embodiment includes a deuterium lamp 101, a first off-axis parabolic reflector 102, a sample cell 103, an optical slit, a fiber coupler 104, an optical fiber 105, a second off-axis parabolic reflector 107, a plane holographic diffraction reflective grating 108, a spherical reflector 109 and a linear array CCD detector 110. The deuterium lamp 101 is used to emit ultraviolet visible light, the deuterium lamp 101 is placed at the focus of the off-axis parabolic reflector 102, the first off-axis parabolic reflector 102 is used to collimate the ultraviolet visible light, the sample cell 103 is placed on the optical path of the collimated light, an optical slit is respectively provided on both sides of the light entrance hole and the light exit hole of the sample cell 103, and the fiber coupler 104 is provided with an optical slit. The coupler 104 is connected to the optical fiber 105, and the collimated light passes through the optical slit, the sample cell 103 and the sample cell 103 in sequence and enters the optical fiber 105 through the optical fiber coupler 104. The outgoing light of the optical fiber 105 is reflected by the slit 106 to the second off-axis parabolic reflector 107. The second off-axis parabolic reflector 107 is used to collimate the incident light into the plane holographic diffraction reflection grating 108. The plane holographic diffraction reflection grating 108 is used to separate the incident synthetic light into linear array light. The separated linear array lights of different wavelengths are imaged onto the linear array CCD detector 110 through the spherical reflector 109. The linear array CCD detector 110 is placed at the focus of the spherical reflector 109 and is used to detect the light intensity of the linear array light.

[0025] In the utility model, the optical slits of the same structure on the left and right sides cooperate with each other to form parallel light of a certain caliber, ensuring that the light entering the sample cell is parallel light, filtering out non-parallel light, and at the same time ensuring that the light passing through the sample cell is parallel light, controlling the caliber of the parallel light coupled into the optical fiber, and ensuring that the transmitted light enters the optical fiber 105 better.

[0026] The off-axis parabolic reflector 107, the plane holographic diffraction reflective grating 108, the spherical reflector 109 and the linear array CCD detector 110 constitute a spectrometer. Figure 2 The schematic diagram of the structure principle of the spectrometer is shown in Figure 2. In order to improve the resolution of the liquid chromatography ultraviolet diode array detector, it is necessary to select the devices and determine the positional relationship between the devices. The specific steps include:

[0027] (1) Perform initial structural calculations.

[0028] First, set the angle between the incident light of the central wavelength and the diffracted light to 30°, then:

[0029] i+θ=Φ=30°

[0030] The incident light and diffracted light of the adopted structure are on the normal side, satisfying the equation:

[0031] d(sini-sinθ)=mλ

[0032] Where i is the grating incident angle, θ is the grating exit angle, d is the grating line distance, m is the diffraction order, and λ is the main wavelength.

[0033] Combining the above formulas, we can get:

[0034] i=24.8°θ=5.2°

[0035] In the design, the slit width is selected as 25um. The spectrometer resolution, slit width, and focal length of the second off-axis parabolic reflector have the following relationship:

[0036]

[0037] Among them, Δλ is the resolution of the spectrometer, a is the slit width, d is the line width of the plane holographic diffraction reflection grating, m is the order of the plane holographic diffraction reflection grating, f1 is the focal length of the second off-axis parabolic reflector, and f1=40mm, d=1.57μm, m=1 are set. Substituting into the calculation, the spectrometer resolution Δλ≈0.98nm is obtained, which can meet our design requirements.

[0038] Next, the spherical reflector 109 is selected. The focal length of the spherical reflector, the spectral range, and the length of the linear array CCD detector have the following relationship:

[0039]

[0040] Where n is the refractive index of the environment in which the reflector is located, λ2 is the end wavelength of the spectral range, λ1 is the starting wavelength of the spectral range, f2 is the focal length of the spherical reflector, set f2=50mm, l is the length of the linear array CCD detector, and substitute it into the formula to obtain the length of the linear array CCD detector l=21.1mm. Select the appropriate linear array CCD detector based on this calculation result.

[0041] Next, in order to achieve better image quality, the slit should be placed at the meridian focus of the second off-axis parabolic reflector, and the distance from the slit 106 to the second off-axis parabolic reflector 107 is:

[0042]

[0043] Take SM1 as 39mm and substitute it into the formula to calculate the incident angle of the second off-axis parabolic reflector It is 12.8°.

[0044] To eliminate the initial coma of the spectrometer to 0, the following formula must be satisfied:

[0045]

[0046] f1, f2, Substitute the value of into the incident angle of the spherical reflector The relationship between the focal length of the spherical reflector, the incident angle of the light and the distance to the linear array CCD detector is as follows:

[0047]

[0048] Substituting the data into the calculation, we can get M2D=47.8mm.

[0049] Through the above calculation results, the initial structure is obtained, and the initial structure parameter values ​​are shown in Table 1:

[0050] Table 1

[0051]

[0052] (2) Optimize the initial structure.

[0053] Input the calculated initial parameters in Table 1 into the optical simulation software, and set nine simulation wavelengths, namely 200nm, 201nm, 202nm, 549nm, 550nm, 898nm, 899nm, and 900nm, with the main wavelength set to 550nm. The system semi-aperture is set to 0.12. Then set the optimization function parameters, optimize the point diagram in the Y direction, use the Gaussian quadrature sampling method, fix the focal length and various aberration requirements, and finally use the hammer optimization method to optimize, as shown in Table 2 to obtain the optimized structural parameter values.

[0054] Table 2

[0055]

[0056] (3) Perform initial structural calculations.

[0057] The initial structural parameters determined in step (1) and the structural parameters after optimization in step (2) are input into existing optical product design and simulation software (such as Zemax), and the results are respectively Figure 3 and Figure 4 As can be seen from the figure, the optimized spectrometer has a very high optical resolution. The wavelength range actually used by the optimized spectrometer can be expanded from 200-900nm to 200-1100nm. The band range is 900nm, and the resolution of each pixel can reach 0.44nm (900÷2048).

[0058] like Figure 7As shown, the present embodiment involves a fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector, which also includes a filter, a filter baffle 12 and a control motor 13. The filter is mounted on the filter baffle 12, and the filter baffle 12 is mounted on the control motor 13. The filter is driven by the control motor 13 to enter and exit the optical path between the deuterium lamp 101 and the first off-axis parabolic reflector 102. The filter is used to filter out stray light.

[0059] Specifically, the optical fiber 105 involved in this embodiment is an ultraviolet-resistant quartz optical fiber.

[0060] like Figure 5-7 As shown, the present embodiment involves a fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector, which also includes a shell 2, a first dark box 3 and a second dark box 4. The deuterium lamp 101 and the first off-axis parabolic reflector 102 are installed in the first dark box 3, the off-axis parabolic reflector 107, the plane holographic diffraction reflective grating 108, the spherical reflector 109 and the linear array CCD detector 110 are installed in the second dark box 4, the first dark box 3 and the second dark box 4 are placed in the shell cavity, the light exit hole on the first dark box 3 and the central axis of the optical slit at the light entrance hole of the sample cell are aligned, one end of the fiber coupler 104 is connected to the optical slit at the light exit hole of the sample cell, and the other end is connected to the slit 106 on the first dark box 3 through the optical fiber 105.

[0061] The present embodiment involves a fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector, which also includes a heat dissipation duct 5 and a heat dissipation fan 6. The heat dissipation duct 5 is fixed in the inner cavity of the shell, and the heat dissipation fan 6 is fixed on the shell 2. The first dark box 3 is connected to the heat dissipation fan 6 through the heat dissipation duct 5. The heat dissipation fan 6 and the heat dissipation duct 5 are used together to improve the heat dissipation effect of the deuterium lamp 101.

[0062] Preferably, the fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector involved in this embodiment also includes a photodiode (PD) 7, which is placed in the first dark box 3 and is used to detect the luminescence spectrum and luminescence intensity of the deuterium lamp, and judge the service life of the deuterium lamp according to the luminescence intensity.

[0063] Preferably, the optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector involved in this embodiment further includes a leakage protection resistor 10, and the leakage protection resistor 10 is used to determine whether the sample cell is leaking.

[0064] Preferably, the fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector involved in this embodiment further includes a power switch, a power indicator light and a status indicator light.

[0065] Preferably, the present embodiment involves a fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector, which also includes a deuterium lamp control board 8, a linear array CCD control board 9 and a main control board 11. The deuterium lamp control board 8 is connected to the deuterium lamp to provide a high-voltage power supply for lighting the deuterium lamp and a regulated power supply for the deuterium lamp to continuously emit light. The linear array CCD control board 9 is connected to the linear array CCD detector to power the linear array CCD detector and read the electrical signal of the linear array CCD detector at the same time. The main control board is respectively connected to the deuterium lamp control board 8, the cooling fan 6, the photodiode 7, the leakage protection resistor 10, the linear array CCD control board 9, the power switch, the power indicator light, the status indicator light and the control motor 13 to control the operation of the corresponding devices.

[0066] The linear array CCD detector involved in this embodiment is a high-resolution linear array CCD detector with 2048 pixels and an optical resolution of 0.44nm, which makes the detection wavelength optical resolution of the diode array detector reach 0.44nm, which is at least five times higher than the accuracy of ordinary diode array detectors.

[0067] The plane holographic diffraction reflective grating 108 involved in this embodiment is a high-resolution plane holographic diffraction grating, and the grating lines reach 1400lp / mm, which provides a basis for realizing a high-resolution optical path and has a higher cost advantage compared with the concave grating commonly used in the market.

[0068] The working process of a fiber-transmitted high-resolution liquid chromatography ultraviolet diode array detector involved in this embodiment is as follows: the ultraviolet-visible light emitted by the deuterium lamp light source 101 is collimated by the first off-axis parabolic mirror 102, incident into the sample pool 103 through the optical slit, and then emitted through an optical slit, the optical slit is a circular hole slit, and the sizes of the two optical slits are equal. The parallel light emitted from the optical slit 3 is coupled into the optical fiber 105 through the fiber coupler 104. The fiber coupler makes the light intensity utilization rate of the system higher, and the detector obtains more light intensity. The divergent light emitted from the optical fiber 105 passes through the slit 106 and hits the off-axis parabolic reflector 107. The light is collimated by the second off-axis parabolic mirror 107 and becomes parallel light, and then hits the plane reflective holographic diffraction grating 108. The grating 108 splits the composite light, and the light of different wavelengths can be separated. The separated parallel lights of different wavelengths are imaged on the high-resolution linear array CCD detector 109 through the spherical reflector 109. The linear array CCD detector is a photoelectric conversion device that converts light signals into electrical signals, and then filters and amplifies them to become the detection signals we need. According to the signal strength of each pixel, the light intensity of the corresponding wavelength can be determined.

Claims

1. A liquid chromatography ultraviolet diode array detector, characterized in that: The invention comprises a deuterium lamp, a first off-axis parabolic reflector, a sample cell, an optical slit, a fiber coupler, an optical fiber, a second off-axis parabolic reflector, a plane holographic diffraction reflective grating, a spherical reflector and a linear array CCD detector, wherein the deuterium lamp is used to emit ultraviolet and visible light, the deuterium lamp is placed at the focus of the first off-axis parabolic reflector, the first off-axis parabolic reflector is used to collimate the ultraviolet and visible light, the sample cell is placed on the optical path of the collimated light, an optical slit is respectively arranged on both sides of the light entrance hole and the light exit hole of the sample cell, the fiber coupler is connected to the optical fiber, and the collimated light The light passes through the optical slit, the sample cell and the optical slit in sequence and enters the optical fiber through the optical fiber coupler. The outgoing light of the optical fiber is reflected by the slit to the second off-axis parabolic reflector. The second off-axis parabolic reflector is used to collimate the incident light into the plane holographic diffraction reflection grating. The plane holographic diffraction reflection grating is used to separate the incident synthetic light into linear array light. The separated linear array lights of different wavelengths are imaged onto the linear array CCD detector through the spherical reflector. The linear array CCD detector is placed at the focus of the spherical reflector to detect the light intensity of the linear array light.

2. The liquid chromatography ultraviolet diode array detector according to claim 1, characterized in that: The size of the slit is 3mm×25um, the distance from the slit to the second off-axis parabolic reflector is 39.65mm, the focal length of the second off-axis parabolic reflector is 40mm, the incident angle of the incident principal ray of the second off-axis parabolic reflector is 11.5°, the distance from the second off-axis parabolic reflector to the plane holographic diffraction reflective grating is 40mm, the incident angle of the incident principal ray of the plane holographic diffraction reflective grating is 24.8°, the exit angle of the exit principal ray of the plane holographic diffraction reflective grating is 5.2°, the distance from the plane holographic diffraction reflective grating to the spherical reflector is 35mm, the angle of the incident light of the spherical reflector is 18.2°, the distance from the spherical reflector to the linear array CCD detector is 47.8mm, the angle between the normal of the linear array CCD detector and the incident principal ray is less than or equal to 10°, and the number of pixels of the linear array CCD detector is 2048.

3. The liquid chromatography ultraviolet diode array detector according to claim 1 or 2, characterized in that: The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a filter, a filter baffle and a control motor. The filter is mounted on the filter baffle, and the filter baffle is mounted on the control motor. The control motor drives the filter to enter and exit the light path between the deuterium lamp and the first off-axis parabolic reflector.

4. The liquid chromatography ultraviolet diode array detector according to claim 3, characterized in that: The fiber-optic transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a shell, a first dark box and a second dark box. The deuterium lamp and the first off-axis parabolic reflector are installed in the first dark box, and the off-axis parabolic reflector, the plane holographic diffraction reflection grating, the spherical reflector and the linear array CCD detector are installed in the second dark box. The first dark box and the second dark box are placed in the shell cavity. The light exit hole on the first dark box is aligned with the central axis of the optical slit at the light entrance hole of the sample pool. One end of the fiber optic coupler is connected to the optical slit at the light exit hole of the sample pool, and the other end is connected to the slit on the first dark box through the optical fiber.

5. The liquid chromatography ultraviolet diode array detector according to claim 4, characterized in that: The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a heat dissipation pipeline and a heat dissipation fan. The heat dissipation pipeline is fixed in the inner cavity of the shell, the heat dissipation fan is fixed on the shell, and the first dark box is connected to the heat dissipation fan through the heat dissipation pipeline.

6. The liquid chromatography ultraviolet diode array detector according to claim 5, characterized in that: The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a photodiode, which is placed in the first dark box and is used to detect the luminescence spectrum and luminescence intensity of the deuterium lamp.

7. The liquid chromatography ultraviolet diode array detector according to claim 6, characterized in that: The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a leakage protection resistor, which is used to determine whether the sample pool is leaking.

8. The liquid chromatography ultraviolet diode array detector according to claim 7, characterized in that: The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a power switch, a power indicator light and a status indicator light.

9. The liquid chromatography ultraviolet diode array detector according to claim 8, characterized in that: The optical fiber transmission high-resolution liquid chromatography ultraviolet diode array detector also includes a deuterium lamp control board, a linear array CCD control board and a main control board. The deuterium lamp control board is connected to the deuterium lamp to provide a high-voltage power supply for lighting the deuterium lamp and a regulated power supply for the deuterium lamp to continuously emit light. The linear array CCD control board is connected to the linear array CCD detector to supply power to the linear array CCD detector and read the electrical signal of the linear array CCD detector at the same time. The main control board is respectively connected to the deuterium lamp control board, a cooling fan, a photodiode, a leakage protection resistor, the linear array CCD control board, a power switch, a power indicator light, a status indicator light and a control motor to control the operation of corresponding devices.

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