CN107132202B - Evaporation light scattering detector - Google Patents
Evaporation light scattering detector Download PDFInfo
- Publication number
- CN107132202B CN107132202B CN201710380682.7A CN201710380682A CN107132202B CN 107132202 B CN107132202 B CN 107132202B CN 201710380682 A CN201710380682 A CN 201710380682A CN 107132202 B CN107132202 B CN 107132202B
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- detection room
- detection
- light source
- main part
- drift tube
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- 238000001704 evaporation Methods 0.000 title claims description 6
- 230000008020 evaporation Effects 0.000 title claims description 6
- 238000000149 argon plasma sintering Methods 0.000 title claims description 4
- 238000001514 detection method Methods 0.000 claims abstract description 91
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000000105 evaporative light scattering detection Methods 0.000 claims abstract description 7
- 238000010521 absorption reaction Methods 0.000 claims description 20
- 230000005284 excitation Effects 0.000 claims description 10
- 238000005253 cladding Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 abstract description 10
- 239000002904 solvent Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
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- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses an evaporative light scattering detector with long service life, which comprises a case, wherein a detection door is arranged on the case, an observation window is arranged on the detection door, an atomization tube, a drift tube and a detection chamber which are sequentially connected are arranged in the case, the atomization tube is arranged at the observation window of the detection door in the case, the drift tube comprises a liquid inlet section, a spring-shaped body and a liquid outlet section which are sequentially connected, the liquid inlet section is parallel to the liquid outlet section, the liquid inlet section is connected with the atomization tube, the liquid outlet section is connected with the detection chamber, and a heating belt is coated on the body.
Description
Technical Field
The present invention relates to an evaporative light scattering detector.
Background
The evaporative light scattering detector belongs to a mass detector, can theoretically detect any substance with volatility lower than that of a mobile phase, has lower detection sensitivity on a sample component with ultraviolet absorption, has lower reproducibility (the reproducibility of the factory requirement is RSD is less than 6 percent), and is commonly used for detecting substances without ultraviolet absorption.
The existing evaporative light scattering detector comprises a case, as shown in fig. 1, wherein an atomization tube 1', a drift tube 2' and a detection chamber which are connected in sequence are arranged in the case. The drift tube 2' comprises a liquid inlet section, a spring-shaped body and a liquid outlet section which are sequentially connected together, wherein the liquid inlet section and the liquid outlet section are vertically arranged. The drift tube is wound with a heating band (not shown). The detection chamber comprises a detection chamber main body 3 'which is vertically arranged, a detection object inlet connected with a drift tube 2' is arranged at the lower end of the detection chamber main body 3', an excitation light source 4' is arranged on the side wall of the detection chamber main body 3', a light source absorption light trap 5' is arranged opposite to the excitation light source 4 'on the side wall 3' of the detection chamber, a detector lens cone 6 'is arranged on the detection chamber main body 3', a photoelectric sensor 7 'is connected to the other end of the detector lens cone 6', and the detector lens cone 6 'comprises a cylinder body arranged on the detection chamber main body 3' and a diaphragm fixedly arranged on the cylinder body and far away from one end of the detection chamber main body; the side wall of the detection chamber main body 3' is also provided with a light source absorption light trap 8' opposite to the detector lens cone 6 '.
With the detector of this structure, when the evaporation of the detection object is insufficient, or the evaporation is failed, all of the condensed solvent flows back to the atomizing tube along the drift tube. Two problems are caused, on one hand, the corrosion of the solvent to the drift tube is increased, and on the other hand, the pressure of the liquid discharged from the atomization tube is increased.
In addition, because the drift tube body is in a stretched spring shape, the heating belt is wound in a single mode, the work is very complicated, and the temperature uniformity is poor.
The light emitted from the light source when the detector is used can completely pass through the sample, scattering is generated in the sample, and part of scattered light can enter the photoelectric sensor (which is needed by a user); the light rays entering through the sample can irradiate on the detection chamber wall opposite to the light source to form diffuse reflection, and part of the diffuse reflection light can enter the photoelectric sensor, namely stray light in the detection chamber. The detector has two optical traps for reducing diffuse reflection, but the diffuse reflection level is high due to the fact that the opening of the optical trap of the light source is too large, and the optical path of the device is complicated, large in size and high in cost.
The detector with the structure can not adapt to various samples well due to the detector lens barrel in the detector, so that the baseline noise and the linear measuring range of the instrument can not be maintained in a good state when some samples are measured.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: an evaporative light scattering detector with a drift tube having a long service life is provided.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides an evaporation light scattering detector, which comprises a case, be equipped with the detection door on the machine case, be equipped with the observation window on the detection door, be equipped with the fog pipe that connects gradually in the machine case, drift tube, detection room, the observation window department of detection door in the machine case is located to the fog pipe, drift tube is including the feed liquor section that connects gradually together, be the spring-like body that compresses to the end, the feed liquor section is parallel with the feed liquor section, the feed liquor section is connected with the fog pipe, the feed liquor section is connected with the detection room, the cladding has the heating strip on the body, the heating strip winding adopts side by side mode, detection room main part axis is located the horizontality, be equipped with the weeping mouth on the detection room main part lateral wall, weeping mouth department is equipped with weeping joint, weeping mouth is located the low point department of vertical direction on the detection room main part lateral wall, the detection room is including the detection room main part, detection room main part axial tip is equipped with the detection thing import of being connected with the drift tube, be equipped with the excitation light source on the detection room main part lateral wall, be equipped with light source absorption trap on the excitation light source opposite, light source absorption trap is equipped with near detection room one end, be equipped with on the detection room main part lateral wall, be equipped with the diameter and be less than light source absorption aperture, the detector on the main part lateral wall, the end plate is equipped with the end plate on the detection barrel is located the barrel and can be dismantled in the barrel.
As a preferable scheme, a heat radiation fan is arranged at the bottom of the drift tube in the case.
The beneficial effects of the invention are as follows: because drift tube is including connecting gradually the feed liquor section that is the spring form body, the play liquid section that compress to the end, the feed liquor section is parallel with the play liquid section, and the feed liquor section is connected with the atomizing pipe, goes out the liquid section and is connected with the detection room, and the cladding has the heating band on the body, not only reduces by a wide margin in the volume for detector inner structure is more reasonable, compact. The drift tube with the structure enables the detection chamber main body to be placed horizontally, the side wall of the detection chamber main body is provided with the liquid leakage port, the liquid leakage port is positioned at the low point of the side wall of the detection chamber main body in the vertical direction, most of condensed solvent is discharged through the liquid leakage port, and the inner wall of the detection chamber main body is provided with the protective coating and cannot be corroded; only a very small part of condensed solvent flows back to the atomization tube through the drift tube, so that the corrosion risk of the drift tube is reduced, and the safety of the instrument is improved.
The heating belt can be wound in a parallel mode, and a plurality of layers of drift tubes are tightly pressed together, so that the temperature uniformity in the drift tubes is improved, and the condensation of solvents is further reduced;
the observation window department of detecting the door in the quick-witted case is located to the atomizing pipe, and the user of being convenient for observes the atomizing effect.
Because the side wall of the detection chamber is provided with the light source absorption light trap opposite to the excitation light source, one end of the light source absorption light trap, which is close to the detection chamber, is provided with the end plate, and the end plate is provided with the absorption hole with the diameter smaller than one third of the inner diameter of the light source absorption light trap, the first diffuse reflection of the light source light in the detection chamber can be reduced to a very low level, namely, the stray light of the system is greatly reduced, so that the detection result is more accurate; and simultaneously, the manufacturing cost is reduced.
The detector lens cone comprises a cylinder body arranged on the detection chamber main body and a diaphragm detachably arranged on one end of the cylinder body far away from the detection chamber main body, and the diaphragm can be replaced, so that a proper diaphragm can be selected according to the type and the concentration of a practical sample of a user, and the baseline noise and the measurement linear range of the instrument can be always maintained in a good state.
Because be equipped with radiator fan in the quick-witted case in drift tube bottom, inside the detector that thermal insulation effect is fabulous for drift tube cooling is faster, thereby makes this detector be used for can fast cooling after the material that atomizing temperature is high detects, with the detection of adaptation atomizing temperature low material, has shortened latency greatly.
Drawings
Fig. 1 is a schematic perspective view of a portion of a conventional detector including a mist pipe, a drift pipe, and a detection chamber.
Fig. 2 is a schematic perspective view of the present invention (parts removed for clarity).
FIG. 3 is a schematic perspective view of a detection chamber according to the present invention.
FIG. 4 is a schematic diagram showing the front view of the detection chamber according to the present invention.
Fig. 2 to 4: 1. the device comprises a case, a detection door, a viewing window, an atomization tube, a drift tube, a detection chamber body, a liquid leakage joint, an excitation light source, a light source absorption light trap, an end plate, a detector lens barrel, 551, a barrel body, 552, a diaphragm, 56, a photoelectric sensor and a heat dissipation fan.
Detailed Description
Specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 2-4, an evaporative light scattering detector comprises a case 1, wherein a detection door 2 is arranged on the case 1, and an observation window 21 is arranged on the detection door 2. The case 1 is provided with an atomization tube 3, a drift tube 4 and a detection chamber 5 which are connected in sequence, and the atomization tube 3 is arranged at an observation window 21 of a detection door in the case 1. The drift tube 4 comprises a liquid inlet section, a spring-shaped body and a liquid outlet section which are sequentially connected together, wherein the spring-shaped body and the liquid outlet section are compressed to the bottom, the liquid inlet section is parallel to the liquid outlet section, the liquid inlet section is connected with the atomization tube 3, the liquid outlet section is connected with the detection chamber 5, and a heating belt (not shown in the figure) is coated on the body. A heat radiation fan 6 is arranged at the bottom of the drift tube 4 in the case 1.
The detection chamber comprises a detection chamber main body 51, the axis of the detection chamber main body 51 is in a horizontal state, and the axial end part of the detection chamber main body 51 is provided with a detection object inlet connected with the drift tube 4. The side wall of the detection chamber main body 51 is provided with a liquid leakage port, the liquid leakage port is provided with a liquid leakage connector 511, and the liquid leakage port is positioned at the low point of the vertical direction on the side wall of the detection chamber main body 51.
The side wall of the detection chamber main body 51 is provided with an excitation light source 52, the side wall of the detection chamber 5 is provided with a light source absorption light trap 53 opposite to the excitation light source 52, one end of the light source absorption light trap 53, which is close to the detection chamber 5, is provided with an end plate 54, the end plate 54 is provided with an absorption hole with the diameter smaller than one third of the inner diameter of the light source absorption light trap, the detection chamber main body 51 is provided with a detector lens barrel 55, the other end of the detector lens barrel 55 is connected with a photoelectric sensor 56, the detector lens barrel 55 comprises a barrel 551 arranged on the detection chamber main body 51, and a diaphragm 552 detachably arranged on the barrel 551 and far away from one end of the detection chamber main body 51.
The above-described embodiments are merely illustrative of the principles and functions of the present invention, and some of the practical examples, not intended to limit the invention; it should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present invention.
Claims (2)
1. The utility model provides an evaporation light scattering detector, includes the quick-witted case, is equipped with detection door, its characterized in that on the machine case: the utility model provides a detection room, including the detection room, the detection room is equipped with the observation window on the detection door, be equipped with atomizing pipe, drift tube, detection room that connect gradually in the quick-witted case, the drift tube is including the feed liquor section that connects gradually, be the spring form body that compresses to the end, go out the liquid section, the feed liquor section is parallel with the liquid section, the feed liquor section is connected with atomizing pipe, go out the liquid section and be connected with the detection room, the cladding has the heating strip on the body, the heating strip winding adopts side by side mode, detection room main part axis is located the horizontality, be equipped with the weeping mouth on the detection room main part lateral wall, weeping mouth department is equipped with weeping joint, weeping mouth is located the low point department of vertical direction on the detection room main part lateral wall, the detection room is equipped with the detection room main part with the detection thing import that is connected with drift tube, be equipped with the excitation light source on the detection room main part lateral wall, be equipped with the light source absorption light trap on the excitation light source lateral wall, light source absorption light trap is close to detection room one end, be equipped with the absorption hole that the diameter is less than the light source absorption internal diameter on the end plate, be equipped with the detector on the detection room main part, the other end is connected with the detector on the detection room main part, detection room has the vertical direction, detection room lateral wall is equipped with the weeping mouth on the barrel, detection room.
2. An evaporative light scattering detector as defined in claim 1, wherein: and a heat radiation fan is arranged at the bottom of the drift tube in the case.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611185818 | 2016-12-20 | ||
| CN2016111858180 | 2016-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107132202A CN107132202A (en) | 2017-09-05 |
| CN107132202B true CN107132202B (en) | 2023-10-27 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720593305.7U Active CN206818610U (en) | 2016-12-20 | 2017-05-25 | A kind of EISD |
| CN201710380682.7A Active CN107132202B (en) | 2016-12-20 | 2017-05-25 | Evaporation light scattering detector |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720593305.7U Active CN206818610U (en) | 2016-12-20 | 2017-05-25 | A kind of EISD |
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| Country | Link |
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| CN (2) | CN206818610U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206818610U (en) * | 2016-12-20 | 2017-12-29 | 苏州赛德福科学仪器有限公司 | A kind of EISD |
| 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 |
| CN113390829A (en) * | 2021-06-25 | 2021-09-14 | 苏州赛德福科学仪器有限公司 | Detection chamber of evaporative light scattering detector |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6229605B1 (en) * | 2000-03-10 | 2001-05-08 | Alltech Associates, Inc. | Evaporative light scattering device |
| CN1932495A (en) * | 2006-09-28 | 2007-03-21 | 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 |
| CN203929635U (en) * | 2014-02-23 | 2014-11-05 | 上海浩杰生物科技有限公司 | A kind of evaporative light-scattering detector |
| 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 |
| CN204696506U (en) * | 2015-03-31 | 2015-10-07 | 丰顺县梅丰水电发展有限公司 | A kind of dust-proof damp proof electric power cabinet |
| 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 |
| CN205749852U (en) * | 2016-05-10 | 2016-11-30 | 倍科质量技术服务（东莞）有限公司 | Quasiconductor cooling aging equipment for the large-power LED light bead of LM-80 standard |
| CN206818610U (en) * | 2016-12-20 | 2017-12-29 | 苏州赛德福科学仪器有限公司 | A kind of EISD |
-
2017
- 2017-05-25 CN CN201720593305.7U patent/CN206818610U/en active Active
- 2017-05-25 CN CN201710380682.7A patent/CN107132202B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6229605B1 (en) * | 2000-03-10 | 2001-05-08 | Alltech Associates, Inc. | Evaporative light scattering device |
| CN1932495A (en) * | 2006-09-28 | 2007-03-21 | 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 |
| CN203929635U (en) * | 2014-02-23 | 2014-11-05 | 上海浩杰生物科技有限公司 | A kind of evaporative light-scattering detector |
| 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 |
| CN204696506U (en) * | 2015-03-31 | 2015-10-07 | 丰顺县梅丰水电发展有限公司 | A kind of dust-proof damp proof electric power cabinet |
| 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 |
| CN205749852U (en) * | 2016-05-10 | 2016-11-30 | 倍科质量技术服务（东莞）有限公司 | Quasiconductor cooling aging equipment for the large-power LED light bead of LM-80 standard |
| CN206818610U (en) * | 2016-12-20 | 2017-12-29 | 苏州赛德福科学仪器有限公司 | A kind of EISD |
Also Published As
| Publication number | Publication date |
|---|---|
| CN206818610U (en) | 2017-12-29 |
| CN107132202A (en) | 2017-09-05 |
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