CN206848164U - A kind of sensing chamber of EISD - Google Patents
A kind of sensing chamber of EISD Download PDFInfo
- Publication number
- CN206848164U CN206848164U CN201720606059.4U CN201720606059U CN206848164U CN 206848164 U CN206848164 U CN 206848164U CN 201720606059 U CN201720606059 U CN 201720606059U CN 206848164 U CN206848164 U CN 206848164U
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- China
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- sensing chamber
- main body
- light source
- lens barrel
- detector lens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
- G01N2021/513—Cuvettes for scattering measurements
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a kind of simple in construction, it is low to detect indoor background optical noise, the sensing chamber of the low EISD of stray light level, including sensing chamber's main body, sensing chamber's main body axial end portion is provided with detectable substance import, sensing chamber's main body wall is provided with excitation source, light source is provided with excitation source opposite absorb ligh trap in sensing chamber's side wall, light source absorbs ligh trap and is provided with end plate close to sensing chamber one end, end plate is provided with 1/3rd sucking that diameter is less than light source absorbing trap internal diameter, sensing chamber's main body is provided with detector lens barrel, the detector lens barrel other end is connected with photoelectric sensor, detector lens barrel includes the cylinder being arranged in sensing chamber's main body, and it is removably disposed on cylinder away from the light bar on sensing chamber's main body one end.
Description
Technical field
It the utility model is related to a kind of sensing chamber of EISD.
Background technology
EISD belongs to mass detector, can detect that volatility is any less than mobile phase in theory
Material, but the sample component detection sensitivity to there is UV absorption compares bottom, and reappearance is poor (to dispatch from the factory and requires reappearance RSD<
6%), now it is usually used in detecting the material of no UV absorption.
Cardinal principle is, mobile phase and component are first atomized, mobile phase evaporation, component forms aerosol, so in vaporization chamber
Enter sensing chamber afterwards, irradiate irradiation aerosol with laser and produce light scattering, determine the light intensity of light scattering and obtain signal.
Component quality (m) and the relation of scattered light intensity (I) are：LgI=blgm+lgk, k and b be with evaporation room temperature and
The relevant constant of the experimental conditions such as mobile phase property.
Three individual regions of detector are range of atomization, desolvation area and detection zone.All detectors all contain these three areas
Domain, chromatogram discharge liquor can be atomized, and evaporate flowing item so that only the dry particles of solute of analyte is carried out into light source
Scattering.
Detection is broadly divided into three steps：
Atomization
Post eluent by HPLC separation is mixed to form uniform misty liquid droplets by sprayer pin hole and nitrogen, so as to
Solvent is set to be easier to evaporate.The size and uniformity of drop be ensure detector sensitivity and it is repeated an important factor for.Together
Heart pipe or flow pattern sprayer mix chromatogram discharge liquor and carrier gas (such as nitrogen), produce a series of small liquid for forming suspended particulate
Body simultaneously enters a slot drift tube.
EISD, pass through the accurate control to air pressure and temperature, it is ensured that in spray chamber formed one compared with
Narrow droplets size distribution, the temperature required for making drop evaporation substantially reduce.
Evaporate (desolvation)
Drop is transported to drift tube from spray chamber and is evaporated by carrier gas.In drift tube, solvent is removed, and leaves particulate
Or the droplet of pure solute.EISD uses low-temperature evaporation pattern, the uniformity of particle is maintained, to half volatile
Material and thermographic compound equally have preferable sensitivity.
Detection
Analyte particles enter detection zone and receive light source irradiation.So light can be scattered and focus on photoelectric sensor
On to measure its intensity.
The granular size (diameter) of analyte determines how light scatters.Detectors measure is relative to 60 ° of excitation beam
The scattered light intensity at place, influenceed with eliminating polarity effect and diffusing reflection as far as possible.Different size of particle has different scattering optic angles
Distribution, and the particle of different sizes and shapes has different light scattering cross sections.Generally, larger particle can scatter more
Light, produce stronger signal and peak response.
Light source uses laser, particles of solute to enter light detection cell after being come out from drift tube, and passes through laser beam.By solute
The light of particle scattering is collected by photoelectric sensor.Particles of solute is encapsulated when entering light detection cell by auxiliary carrier gas,
Avoid scattered in detection cell of solute and be deposited on wall, greatly enhance detection sensitivity and significantly reduce detection cell
The pollution on surface.
Existing EISD room includes sensing chamber's main body, and sensing chamber's main body axial end portion enters provided with detectable substance
Mouthful, sensing chamber's main body wall is provided with excitation source, and light source is provided with excitation source opposite in sensing chamber's side wall absorbs ligh trap, inspection
Survey room main body and be provided with detector lens barrel, the detector lens barrel other end is connected with photoelectric sensor, and detector lens barrel includes setting
Cylinder in sensing chamber's main body and it is fixedly installed on cylinder away from the light bar on sensing chamber's main body one end；Sensing chamber side
A light source is additionally provided with detector lens barrel opposite absorb ligh trap on wall.
Detector using when the light that is sent from light source, can all pass through sample, produce scattering, partial dispersion in the sample
Light can enter in photoelectric sensor (this is that user needs)；Through sample incident light, the detection on light source opposite can be radiated at
On locular wall, diffusing reflection is formed, partly diffusing to enter in photoelectric sensor, and here it is veiling glare in sensing chamber.Detector
Although having two ligh traps, contribute to reduce it is irreflexive, because light source ligh trap opening is excessive, diffusing reflection is horizontal also
It is very high, and make it that equipment light path is complicated, volume is big, and cost is high.
In addition, detector lens barrel can not be well adapted for various different samples, make instrument when measuring some samples
Baseline noise with measurement the range of linearity can not maintain one it is relatively good in the state of.
Utility model content
Technical problem to be solved in the utility model is：A kind of background optical noise simple in construction, detection is indoor is provided
The sensing chamber of EISD low, stray light level is low.
In order to solve the above technical problems, technical scheme is used by the utility model：A kind of EISD
Sensing chamber, including sensing chamber's main body, sensing chamber's main body axial end portion be provided with detectable substance import, and sensing chamber's main body wall is provided with
Excitation source, light source is provided with excitation source opposite in sensing chamber's side wall and absorbs ligh trap, light source absorbs ligh trap close to sensing chamber one
End is provided with end plate, and end plate is provided with 1/3rd sucking that diameter is less than light source absorbing trap internal diameter, set in sensing chamber's main body
There is detector lens barrel, the detector lens barrel other end is connected with photoelectric sensor, and detector lens barrel includes being arranged on sensing chamber's main body
On cylinder and be removably disposed on cylinder away from the light bar on sensing chamber's main body one end.
Further technical problem to be solved is the utility model：There is provided a kind of when detectable substance evaporation is insufficient or steams
The solvent condensed during hair failure corrodes the sensing chamber of small EISD to drift tube.
To solve above-mentioned further technical problem, technical scheme is used by the utility model：Sensing chamber's main body side
Wall is provided with leakage mouth, and leakage joint is provided with leakage mouth, and when sensing chamber's main body axis is located at horizontality, leakage mouth is located at
In sensing chamber's main body wall at the low spot of vertical direction.
The beneficial effects of the utility model are：Light is absorbed due to being provided with light source on excitation source opposite in sensing chamber's side wall
Trap, light source absorb ligh trap and are provided with end plate close to sensing chamber one end, and end plate is provided with three points that diameter is less than light source absorbing trap internal diameter
One of sucking, so detection indoor light source light first time diffusing reflection can be dropped to very low level, that is, system is spuious
Light reduces a lot so that testing result is more accurate；Decrease manufacturing cost simultaneously.
Because detector lens barrel includes the cylinder that is arranged in sensing chamber's main body and is removably disposed on cylinder remote
From the light bar on sensing chamber's main body one end, light bar is replaceable to be allowed to be selected with concentration according to the species of user's actual sample
Suitable light bar, make the baseline noise of instrument and the measurement range of linearity can always maintain one it is relatively good in the state of.
Because sensing chamber's main body wall is provided with leakage mouth, when sensing chamber's main body axis is located at horizontality, leakage mouth
At the low spot of vertical direction in sensing chamber's main body wall, the solvent of condensation is largely discharged by leakage mouth, and only one is small
Mist pipe is flowed back in part by drift tube, reduces the corrosion risk of drift tube, improves the security of instrument.
Brief description of the drawings
Fig. 1 is dimensional structure diagram of the present utility model.
Fig. 2 is main structure diagram of the present utility model.
Fig. 1 is into Fig. 2：1. sensing chamber's main body, 2. excitation sources, 3. light sources absorb ligh trap, 4. end plates, 5. detector mirrors
Cylinder, 51. cylinders, 52. light bars, 6. photoelectric sensors, 7. leakage joints.
Embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in detail.
As shown in Figure 1-2, a kind of sensing chamber of EISD, including sensing chamber's main body 1, sensing chamber's main body 1
Axial end portion is provided with detectable substance import, and the side wall of sensing chamber's main body 1 is provided with excitation source 2, in excitation source 2 in sensing chamber's side wall
Opposite is provided with light source and absorbs ligh trap 3, and light source absorbs ligh trap 3 and is provided with end plate 4 close to sensing chamber one end, and it is small that end plate 4 is provided with diameter
In 1/3rd sucking of light source absorbing trap internal diameter, sensing chamber's main body 1 is provided with detector lens barrel 5, and detector lens barrel 5 is another
One end is connected with photoelectric sensor 6, and detector lens barrel 5 includes the cylinder 51 being arranged in sensing chamber's main body 1 and removably
It is arranged on cylinder 51 away from the light bar 52 on the one end of sensing chamber's main body 1.
The side wall of sensing chamber's main body 1 is provided with leakage mouth, leakage joint 7 is provided with leakage mouth, when the axis position of sensing chamber's main body 1
When horizontality, leakage mouth is located in the side wall of sensing chamber's main body 1 at the low spot of vertical direction.
The principle and its effect of the above embodiments only illustrative the invention, and the implementation that part uses
Example, not for limitation the utility model；It should be pointed out that for the person of ordinary skill of the art, this hair is not being departed from
On the premise of bright creation design, various modifications and improvements can be made, these belong to the scope of protection of the utility model.
Claims (2)
1. a kind of sensing chamber of EISD, including sensing chamber's main body, it is characterised in that：Sensing chamber's main body axial end
Portion is provided with detectable substance import, and sensing chamber's main body wall is provided with excitation source, is provided with sensing chamber's side wall on excitation source opposite
Light source absorbs ligh trap, and light source absorbs ligh trap and is provided with end plate close to sensing chamber one end, and end plate is less than light source absorbing trap provided with diameter
/ 3rd sucking of internal diameter, sensing chamber's main body are provided with detector lens barrel, and the detector lens barrel other end is connected with photoelectricity
Sensor, detector lens barrel include the cylinder being arranged in sensing chamber's main body and are removably disposed on cylinder away from inspection
The light bar surveyed on the main body one end of room.
A kind of 2. sensing chamber of EISD as claimed in claim 1, it is characterised in that：Sensing chamber's main body wall
Leakage mouth is provided with, leakage joint is provided with leakage mouth, when sensing chamber's main body axis is located at horizontality, leakage mouth is positioned at inspection
Survey in the main body wall of room at the low spot of vertical direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016111858034 | 2016-12-20 | ||
| CN201611185803 | 2016-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206848164U true CN206848164U (en) | 2018-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720606059.4U Active CN206848164U (en) | 2016-12-20 | 2017-05-25 | A kind of sensing chamber of EISD |
| CN201710380683.1A Pending CN107219197A (en) | 2016-12-20 | 2017-05-25 | A kind of sensing chamber of EISD |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710380683.1A Pending CN107219197A (en) | 2016-12-20 | 2017-05-25 | A kind of sensing chamber of EISD |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219197A (en) * | 2016-12-20 | 2017-09-29 | 苏州赛德福科学仪器有限公司 | A kind of sensing chamber of EISD |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389615B (en) * | 2016-12-20 | 2020-03-24 | 苏州赛德福科学仪器有限公司 | Evaporation light detection device and evaporation light measurement method based on same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19955362B4 (en) * | 1999-11-17 | 2004-07-08 | Wagner Alarm- Und Sicherungssysteme Gmbh | Scattered light detector |
| US8089627B2 (en) * | 2005-01-18 | 2012-01-03 | Waters Technologies Corporation | Evaporative light scattering detector |
| CN100526869C (en) * | 2006-09-28 | 2009-08-12 | 南京财经大学 | Edible vegetable oil and fat smoke point automatic analyzer |
| CN202171678U (en) * | 2011-08-20 | 2012-03-21 | 福建福光数码科技有限公司 | High-resolution zoom lens for intelligent traffic system |
| CN203551534U (en) * | 2013-09-27 | 2014-04-16 | 上海通微分析技术有限公司 | Microfluidic evaporative light scattering detection device |
| CN104297212A (en) * | 2014-03-06 | 2015-01-21 | 上海浩杰生物科技有限公司 | Photoelectric scattering detector for beverage |
| CN204832019U (en) * | 2015-08-28 | 2015-12-02 | 山东嘉源检测技术有限公司 | Novel formation of image of quality of water environment device |
| CN206848164U (en) * | 2016-12-20 | 2018-01-05 | 苏州赛德福科学仪器有限公司 | A kind of sensing chamber of EISD |
-
2017
- 2017-05-25 CN CN201720606059.4U patent/CN206848164U/en active Active
- 2017-05-25 CN CN201710380683.1A patent/CN107219197A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219197A (en) * | 2016-12-20 | 2017-09-29 | 苏州赛德福科学仪器有限公司 | A kind of sensing chamber of EISD |
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| CN107219197A (en) | 2017-09-29 |
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