Ultraviolet-visible detector monochromator

Abstract

The invention discloses an ultraviolet-visible detector monochromator, which comprises a lamp box, an optical lens, a slit seat, a filter disc device, a grating device, a beam splitter and a reflector, wherein the lamp box is in a horizontal type, and a deuterium lamp and a tungsten lamp are arranged in the lamp box and are located at a position close to a front panel of a monochromator box body; and the filter disc device comprises a filter disc and a drive motor which is connected with the filter disc and drives the filter disc to rotate, and the filter disc is provided with an empty light through hole and a light through hole on which holmium glass is arranged. In the ultraviolet-visible detector monochromator, since the lamp box is in the horizontal type, when the tungsten lamp is needed to be replaced, only the front panel and a front metal plate door panel of the monochromator are needed to be opened, and thus the tungsten lamp can be directly taken down; when the deuterium lamp is needed to be replaced, only two screws on the deuterium lamp are needed to be unscrewed, and then the deuterium lamp can be taken down, so that the simplicity and the convenience in lamp replacement operation are realized; and in addition, the filter disc is provided with the light through hole on which the holmium glass is arranged, so that the wavelength calibration operation of the monochromator can be carried out through the holmium glass.

Description

technical field [0001] The invention relates to the technical field of liquid chromatography analysis, in particular to an ultraviolet-visible detector monochromator. Background technique [0002] The ultraviolet-visible detector monochromator is the main component of the detector optical system. Its main function is to decompose the polychromatic spectrum in the 200nm to 800nm ​​band emitted by the deuterium lamp and the tungsten lamp into monochromatic light of a certain wavelength. Among them, the monochromatic light of a certain wavelength formed by the decomposition of the ultraviolet-visible detector monochromator is irradiated on the light hole of the detector through the beam splitter and the mirror. When in the cell, the mobile phase will absorb the monochromatic light, and the unabsorbed monochromatic light will be photoelectrically converted to generate a current signal, which can be used for chromatographic analysis and detection. [0003] The UV-Vis detector mo...

AI Technical Summary

Problems solved by technology

Among them, the deuterium lamp and the tungsten lamp are consumables, and the quality will gradually deteriorate with the continuous use of the monochromator until they cannot be used. At this time, they need to be replaced

However, the light box in the existing monochromator is placed vertically. When the deuterium lamp or tungsten lamp needs to be replaced, the upper cover of the monochromator needs to be opened to take out the lamp. In this way, the replacement of the deuterium or tungsten lamp will be more complicated

[0005] Moreover, the existing UV-visible detector monochromator has no wavelength calibration function, and cannot perform wavelength self-calibration, which may lead to inaccurate test results obtained by the UV-visible detector.

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