CN207866768U - A kind of evaporative light scattering detector - Google Patents
A kind of evaporative light scattering detector Download PDFInfo
- Publication number
- CN207866768U CN207866768U CN201820125357.6U CN201820125357U CN207866768U CN 207866768 U CN207866768 U CN 207866768U CN 201820125357 U CN201820125357 U CN 201820125357U CN 207866768 U CN207866768 U CN 207866768U
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- atomizer
- light scattering
- scattering detector
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Abstract
The utility model discloses a kind of evaporative light scattering detectors, including atomising device, detection device and imaging device, atomising device includes atomizer, atomizer upper end is equipped with atomizer heater, atomizer lower end is equipped with double 90 degree of curved road type mist pipes, and atomising device is Nian Jie with the evaporation entrance of drift tube by the contraction drainage inlet tube in double 90 degree of curved road type mist pipes；The outlet of evaporation drift tube is fixedly connected by connecting flange with flow table is stuck up, and is stuck up flow table and is fixedly connected with detection device by screw；It detects chamber interior walls and is equipped with groove；One side of sensing chamber is fixedly connected by semiconductor laser mounting flange with semiconductor laser, and another side of sensing chamber is connect with imaging device.The utility model detection sensitivity is high, and baseline noise is low, and stability is high, at low cost, is hardly damaged, and has the excellent spuious optical property of absorption, service life long.
Description
Technical field
The utility model is related to a kind of detection device more particularly to a kind of evaporative light scattering detectors.
Background technology
Evaporative light scattering detector is a kind of universal detector, can detect any sample that volatility is less than mobile phase
Product contain chromophoric group without sample.Evaporative light scattering detector remolding sensitivity differential refraction detector is high, becomes to temperature
Change insensitive, baseline stability, is suitble to chromatograph joint used with gradient elution liquid phase.Evaporative light scattering detector has been widely used in carbon
The detection of hydrate, lipoid, aliphatic acid and amino acid, drug and polymer etc..Unique inspection of evaporative light scattering detector
Surveying principle is：First column eluent is atomized to form aerosol, it is last remaining then by evaporation of the solvent in the drift tube of heating
Fixedness particles of solute detected in scattering measuring pond.1, it is atomized：Effect of the liquid mobile phase in nebulizer gas pressure
Under be transformed into tiny drop in spray chamber, to make solvent be easier to evaporate.The size and uniformity of drop are to ensure inspection
Survey the key factor of the sensitivity and repeatability of device.Evaporative light scattering detector, by being accurately controlled to air pressure and temperature, really
It protects and forms a relatively narrow droplets size distribution in spray chamber, so that drop is evaporated required temperature and substantially reduce.2, it evaporates：
Drop is transported to drift tube from spray chamber and is evaporated by carrier gas.In drift tube, solvent is removed, and leaves particle or pure solute
Droplet.Evaporative light scattering detector uses low-temperature evaporation pattern, maintains the uniformity of particle, double of volatile materials and heat
Quick property compound equally has preferable sensitivity.3, it detects：Light source enters after using laser, particles of solute to be come out from drift tube
Light detection pond, and pass through laser beam.It is collected by photomultiplier by the light that particles of solute scatters.Particles of solute into
It is encapsulated, avoid dispersion of the solute in detection cell and is deposited on wall by auxiliary carrier gas when entering light detection pond, greatly enhance
Detection sensitivity and the pollution for significantly reducing detection pool surface.
But existing evaporative light scattering detector has the following defects：
(1) sensitivity of current evaporative light scattering detector, detection is relatively low, and baseline noise is big；
(2) currently on the market common evaporative light scattering detector mainly for solving to enter the one of evaporation drift tube particle
Cause property generally takes the mist pipe of larger split ratio glass material, i.e. atomization to come out too big particle and shunt away, leads to sample introduction
Amount reduces, and influences to detect；
(3) evaporative light scattering detector currently on the market generally began to occur not using 2 years or so detection chamber interior walls
With the corrosion phenomenon of degree, cause evaporative light scattering detector service life short, the service life is not grown.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide evaporative light scattering detectors, should
Utility model detection sensitivity is high, and baseline noise is low, and stability is high, at low cost, is hardly damaged, and has excellent absorption stray light
Performance, service life are long.
The purpose of this utility model adopts the following technical scheme that realization：
Evaporative light scattering detector, including atomising device, detection device and imaging device, the atomising device include mist
Change device, the atomizer upper end is equipped with atomizer heater, and the atomizer lower end is equipped with double 90 degree of curved road type mist pipes,
The atomising device is Nian Jie with the evaporation entrance of drift tube by the contraction drainage inlet tube in double 90 degree of curved road type mist pipes；
The outlet of the evaporation drift tube is fixedly connected by connecting flange with flow table is stuck up, it is described stick up flow table by screw and
Detection device is fixedly connected, and described flow table a side of sticking up is equipped with quick gas-tpe fitting；
The detection device includes sensing chamber, and the detection chamber interior walls are equipped with groove；
One side of the sensing chamber is fixedly connected by semiconductor laser mounting flange with semiconductor laser, described
Another side of sensing chamber is connect with imaging device.
Further, the imaging device includes imaging and focusing fixed cylinder, photomultiplier, laser absorption light well and laser
Light well lid is absorbed, in sensing chamber, the photomultiplier setting is solid in imaging and focusing for the imaging and focusing fixed cylinder setting
On safety barrel, the laser absorption light well lid is assemblied on laser absorption light well, and the imaging and focusing fixed cylinder passes through mounting flange
It is fixedly connected with sensing chamber.
Further, the imaging device further includes photomultiplier heat shield, and the photomultiplier heat shield is placed on
On the outside of photomultiplier, the photomultiplier is fixedly connected with photomultiplier heat shield.
Further, the inlet line end of double 90 degree of curved road type mist pipes is additionally provided with limiting slot, and the atomizer adds
Hot device is inserted into the inlet of double 90 degree of curved road type mist pipes to the limiting slot.
Further, the upper surface of described atomizer is fixedly connected with the interior bottom hole for being bonded atomizer heater using screw,
The groove is equipped with PTFE coatings.
Further, double 90 degree of curved road type mist pipe bottom ends are connected using fluid-tight bend pipe.
Further, the fluid-tight bend pipe docked with the small hole at bottom part of double 90 degree curved road type mist pipes use laser into
Row welding.
Further, the evaporation drift tube is set as helical form.
Further, atomizer heater upper end is arranged concentrically on atomizer, atomizer heater lower end
It is concentric with the inlet line end of double 90 degree of curved road type mist pipes.
Further, the contraction drainage inlet tube is Nian Jie with the evaporation entrance of drift tube using corrosion-proof high-temp glue.
Compared with prior art, the beneficial effects of the utility model are：
(1) evaporative light scattering detector of the utility model, by curved in double 90 degree of atomizer heater lower end setting
Channel type mist pipe, improved double 90 degree of curved road type mist pipes reduce shunting, solve shunting compared with common mist pipe
It than the excessive problem for causing sample size less, while ensure that the shunting to larger particles droplet, there is reliability height, cost
Low, the advantages that being hardly damaged；
(2) evaporative light scattering detector of the utility model, by the way that groove is arranged in detection chamber interior walls, which can be with
It is detected stroke background noise after avoiding the spuious light reflection of laser；The laser absorption light on photomultiplier opposite has been subtracted simultaneously
Well further saves cost, it is ensured that smaller baseline noise, overall noise level compared to original design reduction by 50% with
On.And the reduction of baseline noise is but also sensitivity has 10% or so promotion.
(3) evaporative light scattering detector of the utility model passes through the atomising device provided with atomizer heater, solution
It has determined since atomization process absorbs heat, big droplet is condensed into not only in low temperature environment to the particle being atomized but also is atomized pipe shunting
Problem both ensure that atomization stability also reduces split ratio, have to reproducibility and sensitivity behaviour and significantly be promoted.
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model evaporative light scattering detector.
In figure：10, atomising device；100, atomizer heater；101, atomizer；102, double 90 degree of curved road type mist pipes；
103, fluid-tight bend pipe；104, drainage inlet tube is shunk；11, drift tube is evaporated；12, connecting flange；13, flow table is stuck up；14, detection dress
It sets；140, sensing chamber；141, waste gas outlet；142, sensing chamber's upper cover；15, semiconductor laser；16, semiconductor laser is fixed
Flange；17, imaging device；170, imaging and focusing fixed cylinder；171, photomultiplier；172, photomultiplier heat shield；173、
Laser absorption light well；174, laser absorption light well lid；18, quick gas-tpe fitting；19, limiting slot.
Specific implementation mode
In the following, in conjunction with attached drawing and specific implementation mode, the utility model is described further, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
Evaporative light scattering detector as shown in Figure 1, including atomising device 10, detection device 14 and imaging device 17,
Atomising device 10 includes atomizer 101, and 101 upper end of atomizer is equipped with atomizer heater 100, and 101 lower end of atomizer is set
There are double 90 degree of curved road type mist pipes 102, atomising device 10 to drain inlet tube by the contraction in double 90 degree of curved road type mist pipes 102
104 is Nian Jie with the evaporation entrance of drift tube 11；
By the way that atomizer heater 100 is arranged in atomising device 10, solve since atomization process absorbs heat, to being atomized
Particle low temperature environment condense into big droplet not only but also be atomized pipe shunting the problem of, both ensure that atomization stability also reduce
Split ratio, has reproducibility and sensitivity behaviour and is significantly promoted；By being arranged in 100 lower end of atomizer heater
Double 90 degree of curved road type mist pipes 102, improved double 90 degree of curved road type mist pipes 102 reduce compared with common mist pipe
Shunting, solving the problems, such as that split ratio is excessive causes sample size less, while ensure that the shunting of larger particles droplet have
Reliability is high, at low cost, the advantages that being hardly damaged.
The outlet of evaporation drift tube 11 is fixedly connected by connecting flange 12 with flow table 13 is stuck up, stick up flow table 13 by screw and
Detection device 14 is fixedly connected, and is stuck up 13 a side of flow table and is equipped with quick gas-tpe fitting 18；
Detection device 14 includes sensing chamber 140, and 140 inner wall of sensing chamber is equipped with groove；More specifically, which is set as
Triangle groove；
By the way that the groove of triangle is arranged in 140 inner wall of sensing chamber, which can be to avoid the spuious light reflection of laser
It is detected stroke background noise afterwards；The laser absorption light well 173 on 171 opposite of photomultiplier has been subtracted simultaneously, has further been saved
Cost, it is ensured that smaller baseline noise, overall noise level is compared to 50% or more original design reduction.And baseline noise
Reduction but also sensitivity has 10% or so promotion.
One side of sensing chamber 140 is fixedly connected by semiconductor laser mounting flange 16 with semiconductor laser 15,
Another side of sensing chamber 140 is connect with imaging device 17.
As preferred embodiment, imaging device 17 includes imaging and focusing fixed cylinder 170, photomultiplier 171, laser
Light well 173 and laser absorption light well lid 174 are absorbed, imaging and focusing fixed cylinder 170 is arranged in sensing chamber 140, photomultiplier
171 are arranged in imaging and focusing fixed cylinder 170, and laser absorption light well lid 174 is assemblied on laser absorption light well 173, and imaging is poly-
Burnt fixed cylinder 170 is fixedly connected by mounting flange with sensing chamber 140.By the way that laser absorption light well lid 174, laser absorption is arranged
Light well lid 174 effectively prevents in detection process the secondary reflection of laser light source, ambient, dust etc. to testing result
Influence.
As preferred embodiment, imaging device 17 further includes photomultiplier heat shield 172, and photomultiplier is heat-insulated
Cover 172 is placed on 171 outside of photomultiplier, and photomultiplier 171, which is fixed with photomultiplier heat shield 172 using jackscrew, to be connected
It connects.It prevents ambient temperature from influencing the effect of imaging by the way that photomultiplier heat shield 172 is arranged, improves baseline drift stability
Energy.
As preferred embodiment, the inlet line end of double 90 degree of curved road type mist pipes 102 is additionally provided with limiting slot 19, mist
Change device heater 100 and is inserted into the inlet of double 90 degree of curved road type mist pipes 102 to limiting slot 19.By the way that limiting slot 19 is arranged, prevent
What only atomizer heater 100 was too deep is inserted into double 90 degree of curved road type mist pipes 102, plays certain restriction effect.
As preferred embodiment, the upper surface of atomizer 101 is fixed with the interior bottom hole for being bonded atomizer heater 100 to be connected
It connects, more specifically, the upper surface of atomizer 101 is fixedly connected with the interior bottom hole for being bonded atomizer heater 100 using screw.It is logical
Cross the connection that is screwed so that it is easy to disassemble, and be connected firmly.
As preferred embodiment, 102 bottom end of double 90 degree of curved road type mist pipes is connected using fluid-tight bend pipe 103, is passed through
Using fluid-tight bend pipe 103 so that double 90 degree of curved road type mist pipes 102 connect closely knit, prevent steam in atomization process from missing, and prevent
Only due to there is gap, causes steam to be missed, cause testing result inaccurate or inspection does not measure result.More specifically, liquid
Envelope bend pipe 103 is docked with the small hole at bottom part of double 90 degree of curved road type mist pipes 102 and is welded using laser, is welded by laser
Connect, the advantages of due to laser welding itself so that connecting portion connection it is more closely knit, reliable.
As preferred embodiment, evaporation drift tube 11 is set as helical form.
As preferred embodiment, 100 upper end of atomizer heater is arranged concentrically on atomizer 101, and atomizer adds
100 lower end of hot device is concentric with the inlet line end of double 90 degree of curved road type mist pipes 102.
As preferred embodiment, drainage inlet tube 104 is shunk using corrosion-proof high-temp glue and evaporation drift tube 11
Entrance is bonded.It is bonded by using corrosion-proof high-temp glue, it is therefore prevented that due to high temperature action, cause to shrink drainage inlet tube
104 and evaporation drift tube 11 degenerate, cause instrument to be unable to normal use.
As preferred embodiment, the groove in sensing chamber 140 is equipped with PTFE coatings, by 140 ditch of sensing chamber
Channel-shaped surface is coated with PTFE coatings, allows the service life of sensing chamber 140 to reach 10 years or more and extends service life.
Operation principle：In working condition, two quick gas-tpe fittings 18 on atomizer 101 and quick gas-tpe fitting 18
Air/nitrogen of dried and clean is connected, mobile phase enters from atomizer 101, equal in 101 exit sample of atomizer and mobile phase
Can be by materialization at graininess, larger particle will be punished in double 90 degree of curved road type mist pipes 102 to flow, and is drained by fluid-tight bend pipe 103
Waste liquid bottle, little particle can shrink drainage inlet tube 104 at converge, into evaporation drift tube 11 (being wrapped resistance heater) into
Row evaporation, mobile phase will be gasified after evaporation, and sample particle can pass through connecting flange 12, into flow table 13 is stuck up, then again by
What quick gas-tpe fitting 18 entered stick up, and stream air/nitrogen is wrapped in into sensing chamber 140, and the light of semiconductor laser 15 is just at this time
It can be radiated on sample particle, while sample particle will send out scattering light, scattering light can be detected by photomultiplier 171, light
Electric multiplier tube 171 can convert optical signals into electric signal, be input on the chromatographic software at the ends PC and carry out after motherboard circuit amplifies
Record and storage.
The above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacing belongs to
In the utility model range claimed.
Claims (10)
1. a kind of evaporative light scattering detector, including atomising device, detection device and imaging device, it is characterised in that：
The atomising device includes atomizer, and the atomizer upper end is equipped with atomizer heater, the atomizer lower end
Equipped with double 90 degree of curved road type mist pipes, the atomising device by contraction in double 90 degree of curved road type mist pipes drain inlet tube with
Evaporate the entrance bonding of drift tube；
The outlet of the evaporation drift tube is fixedly connected by connecting flange with flow table is stuck up, and the flow table that sticks up passes through screw and detection
Device is fixedly connected, and described flow table a side of sticking up is equipped with quick gas-tpe fitting；
The detection device includes sensing chamber, and the detection chamber interior walls are equipped with groove；
One side of the sensing chamber is fixedly connected by semiconductor laser mounting flange with semiconductor laser, the detection
Another side of room is connect with imaging device.
2. evaporative light scattering detector as described in claim 1, it is characterised in that：The imaging device includes imaging and focusing
Fixed cylinder, photomultiplier, laser absorption light well and laser absorption light well lid, the imaging and focusing fixed cylinder are arranged in sensing chamber
On, the photomultiplier is arranged in imaging and focusing fixed cylinder, and the laser absorption light well lid is assemblied in laser absorption light well
On, the imaging and focusing fixed cylinder is fixedly connected by mounting flange with sensing chamber.
3. evaporative light scattering detector as claimed in claim 2, it is characterised in that：The imaging device further includes photoelectricity times
Increase pipe heat shield, the photomultiplier heat shield is placed on the outside of photomultiplier, the photomultiplier and photomultiplier
Heat shield is fixedly connected.
4. evaporative light scattering detector as described in claim 1, it is characterised in that：Double 90 degree of curved road type mist pipes
Inlet line end is additionally provided with limiting slot, and the atomizer heater is inserted into the inlet of double 90 degree of curved road type mist pipes to institute
State limiting slot.
5. evaporative light scattering detector as claimed in claim 4, it is characterised in that：The upper surface of described atomizer be bonded mist
The interior bottom hole for changing device heater is fixedly connected using screw, and the groove is equipped with PTFE coatings.
6. evaporative light scattering detector as described in claim 1, it is characterised in that：Double 90 degree of curved road type mist pipe bottoms
End is connected using fluid-tight bend pipe.
7. evaporative light scattering detector as claimed in claim 6, it is characterised in that：The fluid-tight bend pipe with described double 90 degree
The small hole at bottom part docking of curved road type mist pipe is welded using laser.
8. evaporative light scattering detector as described in claim 1, it is characterised in that：The evaporation drift tube is set as spiral
Shape.
9. evaporative light scattering detector as described in claim 1, it is characterised in that：Atomizer heater upper end is concentric
It is set on atomizer, atomizer heater lower end is concentric with the inlet line end of double 90 degree of curved road type mist pipes.
10. evaporative light scattering detector as described in claim 1, it is characterised in that：The contraction drainage inlet tube uses
Corrosion-proof high-temp glue is Nian Jie with the evaporation entrance of drift tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820125357.6U CN207866768U (en) | 2018-01-25 | 2018-01-25 | A kind of evaporative light scattering detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820125357.6U CN207866768U (en) | 2018-01-25 | 2018-01-25 | A kind of evaporative light scattering detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207866768U true CN207866768U (en) | 2018-09-14 |
Family
ID=63458758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820125357.6U Withdrawn - After Issue CN207866768U (en) | 2018-01-25 | 2018-01-25 | A kind of evaporative light scattering detector |
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| Country | Link |
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| CN (1) | CN207866768U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445122A (en) * | 2018-01-25 | 2018-08-24 | 无锡赛那尔仪器设备制造有限公司 | A kind of evaporative light scattering detector |
-
2018
- 2018-01-25 CN CN201820125357.6U patent/CN207866768U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445122A (en) * | 2018-01-25 | 2018-08-24 | 无锡赛那尔仪器设备制造有限公司 | A kind of evaporative light scattering detector |
| CN108445122B (en) * | 2018-01-25 | 2023-10-03 | 无锡赛那尔仪器设备制造有限公司 | Evaporative light scattering detection device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180914 Effective date of abandoning: 20231003 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180914 Effective date of abandoning: 20231003 |