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A UV detector for preparative chromatography using a deep UV LED light source

A technology of LED light source and ultraviolet detector, which is applied in the field of preparation of ultraviolet detectors for chromatography, can solve the problems of high sample concentration interference, low sensitivity of ultraviolet detectors, etc., and achieve the effect of improving detection sensitivity and simplifying structure

Inactive Publication Date: 2016-08-24
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Preparative liquid chromatography has the characteristics of high sample concentration and less interference, so the sensitivity requirements of the ultraviolet detector for its detection are not very high

Method used

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  • A UV detector for preparative chromatography using a deep UV LED light source
  • A UV detector for preparative chromatography using a deep UV LED light source

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Embodiment 1

[0027] Please see attached figure 1 , 2, a kind of preparative chromatography ultraviolet detector that adopts deep ultraviolet LED light source, it comprises housing, base, glass tube, light-shielding film, power supply, condenser mirror, photocell, photocell adjusting frame, control circuit board, LED lamp, signal output terminal ; It is characterized in that the glass tube is fixed in the middle of the base through the bracket; the LED lamp and the photocell are respectively placed on both sides of the glass tube and aligned with the central axis of the glass tube; the condenser is placed at the rear of the LED lamp, and the head of the LED lamp Align the condenser with the head; set the photocell adjustment frame directly opposite the LED light.

[0028] An ultraviolet detector for preparative chromatography using a deep ultraviolet LED light source. The entire system is sealed by a casing 1, and the exposed part of the glass tube 2 serving as a detection cell is also seal...

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Abstract

The invention relates to an ultraviolet detector for preparing a color spectrum employing a deep-ultraviolet LED light source. The ultraviolet detector comprises a housing, a base, a glass tube, a shading film, a power supply, a collecting lens, a photocell, a photocell adjusting bracket, a control circuit board, an LED lamp and a signal output end, wherein the glass tube is fixedly arranged in the middle of the base through a bracket; the LED lamp and the photocell are respectively arranged at two sides of the glass tube and are aligned at the central axis of the glass tube; the collecting lens is arranged on the rear part of the LED lamp; and the head of the LED lamp is aligned at the collecting lens. A broadband deep ultraviolet LED and the like are adopted as light sources; splitting treatment is not needed; and the glass tube as one path of a flow path is directly taken as a detection cell, so that the structure is simplified. All rays from the LED are focused by the collecting lens and penetrate through the detection cell, so as to obtain the maximal luminous flux; and the detection sensitivity is improved.

Description

【Technical field】 [0001] The invention relates to the technical field of liquid chromatography detection, in particular to an ultraviolet detector for preparative chromatography using a deep ultraviolet LED light source. 【Background technique】 [0002] UV detector is the most commonly used detection and monitoring method in preparative liquid chromatography. Usual ultraviolet detectors use mercury lamps as light sources, and through means such as spectroscopic and focusing, let the ultraviolet light of the target wavelength pass through the detection cell, and measure its ultraviolet absorption intensity, and further calculate its concentration through the Lambert-Beer law. [0003] The chromatographic ultraviolet detector using LED as the light source has been greatly developed in recent years. This is due to the rapid development of LED technology. The new technology can greatly reduce the cost of deep ultraviolet LED. Japan has begun large-scale production of 255-350nm em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/74
Inventor 王风贺张凌怡张维冰陈建虎
Owner EAST CHINA UNIV OF SCI & TECH