CN102175805A - Fixed wavelength detector for liquid chromatograph - Google Patents
Fixed wavelength detector for liquid chromatograph Download PDFInfo
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- CN102175805A CN102175805A CN2010106212640A CN201010621264A CN102175805A CN 102175805 A CN102175805 A CN 102175805A CN 2010106212640 A CN2010106212640 A CN 2010106212640A CN 201010621264 A CN201010621264 A CN 201010621264A CN 102175805 A CN102175805 A CN 102175805A
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Abstract
The invention discloses a fixed wavelength detector for a liquid chromatograph. The detector comprises a light source (1) and a detection pond (4), wherein a reference end light cell (6) and a transflective mirror (3) are arranged on the front side of the detection pond (4); a measuring end light cell (5) is arranged on the rear side of the detection pond (4); and the light source (1) is a light-emitting diode (LED), and a focusing lens (2) is arranged between the light source (1) and the transflective mirror (3). The light source is the LED which is high in monochromaticity (the band width is 1 nanometer) and saves energy, and only the focusing lens is needed to converge light rays under the condition that composite light is not required to be diffracted into uniformly-distributed monochromatic light by gratings, so a light path is simplified greatly; the fixed wavelength detector is easy to machine and convenient to debug, can reduce the manufacturing cost substantially and improve the reliability of products, can select LED light sources with corresponding light spectra according to different wavelength ranges required in an analytical method, and has a wide application range.
Description
Technical field:
The present invention relates to a kind of liquid chromatograph fixed wave length detecting device, especially a kind of light path is simple, handling ease, debugging is convenient, monochromaticity is good, reliability is high, save the liquid chromatograph fixed wave length detecting device of electric energy.
Background technology:
High performance liquid chromatography is to change the component concentration in the eluent into corresponding electric signal with the main effect of detecting device.At present, high performance liquid chromatography detecting device commonly used is the ultraviolet variable-wavelenght detector, and basic structure is that light source and detection cell are arranged, and is provided with reference end photoelectric cell and semi-transparent semi-reflecting lens in the detection cell front side, is provided with the measuring junction photoelectric cell at the detection cell rear side.The light that light source sent becomes monochromatic light after treatment, by semi-transparent semi-reflecting lens sub-fraction light is reflexed on the reference end photoelectric cell again, most of light focusing is to detection cell, and after the liquid (eluent) in the detection cell absorbed part energy, the measuring junction photoelectric cell was accepted residual ray.Because of reference end photoelectric cell and the difference of measuring junction photoelectric cell institute output current become corresponding relation with liquid component in the detection cell, can detect the component concentration in the eluent.Because existing light source need be diffracted into equally distributed monochromatic light to complex light with grating mainly based on deuterium lamp and tungsten lamp, has following drawback:
A. light path relates to many group optical mirror slips, complex structure, and processing request height, debugging are loaded down with trivial details;
B. light monochromaticity is limited, and band is roomy, and 8nm normally, parasitic light are difficult for removing, and also may have second order spectrum even three grades of spectrum;
C. the deuterium lamp thermal value is big, and is high to the power supply designing requirement.
Summary of the invention:
The present invention is in order to solve the above-mentioned technical matters of existing in prior technology, provides that a kind of light path is simple, handling ease, debugging is convenient, monochromaticity is good, reliability is high, save the liquid chromatograph fixed wave length detecting device of electric energy.
Technical solution of the present invention is: a kind of liquid chromatograph fixed wave length detecting device, light source and detection cell are arranged, be provided with reference end photoelectric cell and semi-transparent semi-reflecting lens in the detection cell front side, be provided with the measuring junction photoelectric cell at the detection cell rear side, described light source is a light emitting diode, is provided with condenser lens between light source and semi-transparent semi-reflecting lens.
The used light source of the present invention is monochromaticity good (spectral bandwidth is 1nm) and energy-conservation light emitting diode (LED), need not to use grating that complex light is diffracted into equally distributed monochromatic light, only needing condenser lens that light is converged gets final product, greatly simplified light path, not only handling ease, debugging make things convenient for, and can reduce cost of manufacture significantly, improve product reliability, can select the led light source of corresponding spectrum according to the different wavelength range that analytical approach requires, have wide range of applications.
Description of drawings:
Fig. 1 is a light path principle figure of the present invention.
Embodiment:
Below in conjunction with description of drawings the specific embodiment of the present invention.As shown in Figure 1: the same with prior art, light source 1 and detection cell 4 are arranged, be provided with reference end photoelectric cell 6 and semi-transparent semi-reflecting lens 3 in detection cell 4 front sides, be provided with measuring junction photoelectric cell 5 at detection cell 4 rear sides, different is that light source 1 is light emitting diode with prior art, between light source 1 and semi-transparent semi-reflecting lens 3, be provided with condenser lens 2, can select the light emitting diode of corresponding spectrum according to the different wavelength range that analytical approach requires.
The light that light emitting diode sent converges light by condenser lens, by semi-transparent semi-reflecting lens sub-fraction light is reflexed on the reference end photoelectric cell again, most light focusing is to detection cell, after the Liquid Absorption part energy in the detection cell, the measuring junction photoelectric cell is accepted residual ray.
Claims (1)
1. liquid chromatograph fixed wave length detecting device, light source (1) and detection cell (4) are arranged, be provided with reference end photoelectric cell (6) and semi-transparent semi-reflecting lens (3) in detection cell (4) front side, be provided with measuring junction photoelectric cell (5) at detection cell (4) rear side, it is characterized in that: described light source (1) is a light emitting diode, is provided with condenser lens (2) between light source (1) and semi-transparent semi-reflecting lens (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106212640A CN102175805A (en) | 2010-12-31 | 2010-12-31 | Fixed wavelength detector for liquid chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106212640A CN102175805A (en) | 2010-12-31 | 2010-12-31 | Fixed wavelength detector for liquid chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102175805A true CN102175805A (en) | 2011-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106212640A Pending CN102175805A (en) | 2010-12-31 | 2010-12-31 | Fixed wavelength detector for liquid chromatograph |
Country Status (1)
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| CN (1) | CN102175805A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833747A (en) * | 2015-05-06 | 2015-08-12 | 华东理工大学 | Ultraviolet detector for preparing color spectrum employing deep-ultraviolet LED light source |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2408445Y (en) * | 1999-03-17 | 2000-11-29 | 复旦大学 | High sensitive luminosity detector of super thin pool |
| CN1727878A (en) * | 2004-07-28 | 2006-02-01 | 中国科学院大连化学物理研究所 | A kind of detector of fluorescence induced by light-emitting diode in high brightness |
| CN1924556A (en) * | 2005-08-29 | 2007-03-07 | 深圳雷杜生命科学股份有限公司 | Optical path system for clinical test analyzer |
| CN202305493U (en) * | 2010-12-31 | 2012-07-04 | 大连依利特分析仪器有限公司 | Fixed wavelength detector used for liquid chromatograph |
-
2010
- 2010-12-31 CN CN2010106212640A patent/CN102175805A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2408445Y (en) * | 1999-03-17 | 2000-11-29 | 复旦大学 | High sensitive luminosity detector of super thin pool |
| CN1727878A (en) * | 2004-07-28 | 2006-02-01 | 中国科学院大连化学物理研究所 | A kind of detector of fluorescence induced by light-emitting diode in high brightness |
| CN1924556A (en) * | 2005-08-29 | 2007-03-07 | 深圳雷杜生命科学股份有限公司 | Optical path system for clinical test analyzer |
| CN202305493U (en) * | 2010-12-31 | 2012-07-04 | 大连依利特分析仪器有限公司 | Fixed wavelength detector used for liquid chromatograph |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833747A (en) * | 2015-05-06 | 2015-08-12 | 华东理工大学 | Ultraviolet detector for preparing color spectrum employing deep-ultraviolet LED light source |
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Application publication date: 20110907 |