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Dispersion direct reading spectroscopic detector

A photoelectric detector and detector technology, applied in the field of spectral measurement, can solve problems such as situations that are not suitable for rapid changes, achieve good system scalability and compatibility, and simplify the structure.

Inactive Publication Date: 2009-06-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, these detection methods are not suitable for fast-changing occasions, such as flow systems

Method used

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Examples

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Embodiment 1

[0031] Example 1: Flow Injection Chemiluminescence Spectroscopic Detector

[0032] This embodiment is a spectrometer for detecting chemiluminescent spectra. The structure diagram of the instrument is as follows figure 2 As shown, flow injector 1, capillary 2 (sampling channel), spectroscopic system 3, linear array CCD 4, and workstation 5.

[0033] The solution is mixed in the flow path of the flow injector 1, and the solution flows through the vertical capillary 2, the light signal generated during the chemical reaction passes through the capillary 2 and enters the reflection grating spectroscopic system 3, and the light signal is projected to the horizontal On the surface of the linear array CCD 4, the CCD 4 is controlled by the workstation 5, and the data is recorded and output by the workstation 5.

[0034] Each time the CCD records, it records a spectrum. Continuous recording at fixed intervals can record three-dimensional spectral information.

Embodiment 2

[0035] Example 2: Co 2+ Spectral Analysis of Catalyzed Luminol Chemiluminescence

[0036] In the instrument shown in Example 1, each solution required for the luminol chemiluminescence system is injected into the flow path of the flow injector, including the luminescent agent luminol solution, hydrogen peroxide oxidant, sodium bicarbonate carrier and Co 2+ sample solution. Set the CCD to sample continuously at fixed intervals. Catalyst Co injected intermittently 2+ The generated chemiluminescent signal makes the three-dimensional spectral spectrum appear one by one in the shape of peaks, such as Figure 3-1 . Each peak corresponds to the detected chemiluminescent signal (peak at approximately 425nm).

[0037] By cutting the three-dimensional spectrum along a fixed time, the chemiluminescence spectrum at a certain moment can be obtained, such as Figure 3-2 . By cutting the three-dimensional spectrum along a fixed wavelength, the spectrum of the signal changing with time...

Embodiment 3

[0039] Embodiment 3: UV-visible absorption spectrum detector sampling channel

[0040] Ultraviolet and visible absorption is a common chromatographic detection method, which uses the light absorption characteristics of substances for detection and quantification. The grating spectroscopic system and the linear array CCD detector of the instrument shown in Example 1 can still be applied to the detection of the ultraviolet-visible absorption spectrum, but the sampling channel needs to be in accordance with Figure 4 Adjust the lighting accordingly (the structure of the injection channel is as follows Figure 4 , the illumination light of the tungsten-halogen lamp is incident from the front, and enters the diaphragm through the solution).

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Abstract

A dispersion direct reading spectroscopic detector comprises a dispersion mechanism, a multi-channel linear array photoelectric detector, a diaphragm, a sample injection channel and a lighting source; optical signals that come out of the sample injection channel is dispersed after entering the dispersion mechanism penetrating the diaphragm and focused on the surface of the multi-channel linear array photoelectric detector, and the dispersion direction of the optical signals and the linear array direction of the multi-channel linear array photoelectric detector are coincided. With the simultaneous reading data of the multi-channel detector, a spectrum can be directly obtained at one time. By continuously recording the data output of the photoelectric detector, three-dimensional spectroscopic data can be obtained. By the invention, the spectrum can be analyzed and detected in real time, therefore, dynamic processes can be monitored in real time. The detector has the advantages of good system expandability and compatibility, and can combine with various separation technologies as a coupling spectroscopic detector to obtain absorption spectrums or fluorescence spectrums or chemiluminescent spectrums in solution in real time, so as to assist the analysis and test.

Description

technical field [0001] The invention belongs to the technical field of spectrum measurement, and in particular relates to a dispersion type direct-reading spectrum detector. Background technique [0002] For spectral analysis, spectral analysis instruments are indispensable tools. General spectrometers use point detectors. Such detectors must go through a scanning process when obtaining spectra. For example, the grating type needs to rotate the grating, and the Fourier transform type needs to move the fixed mirror. Although the AOTF crystal does not require mechanical movement, However, the continuous conversion process of the transmitted wavelength is also carried out. Such a scanning process takes a long time to scan a spectrum, which is unfavorable for the determination of samples that may change. For example, in the determination of chemiluminescence spectrum, due to the fast chemiluminescence, even if the spectrum is obtained by high-speed scanning, the peak shape of ...

Claims

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Application Information

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IPC IPC(8): G01N21/00
Inventor 唐宏武徐昊
Owner WUHAN UNIV