CN106323972A - Judging device for spectrophotometric titration end point - Google Patents
Judging device for spectrophotometric titration end point Download PDFInfo
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- CN106323972A CN106323972A CN201610942191.2A CN201610942191A CN106323972A CN 106323972 A CN106323972 A CN 106323972A CN 201610942191 A CN201610942191 A CN 201610942191A CN 106323972 A CN106323972 A CN 106323972A
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- titration
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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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/79—Photometric titration
-
- 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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
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- General Health & Medical Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a judging device for a spectrophotometric titration end point. The device comprises a light source, a monochromator, an optical fiber, a conical detection titration bottle, a detector, a display and a power supply, wherein the light source is composed of a tungsten lamp; the monochromator comprises an entrance slit, a lens A, a grating, a lens B and an exit slit; the light source is aligned with the entrance slit; the lens A, the grating, the lens B and the exit slit are successively aligned with and arranged on the rear side of the entrance slit; the exit slit is aligned with a titration reaction area of the conical detection titration bottle through the optical fiber and is aligned with the detector arranged on the other side of the conical detection titration bottle; a titration pipe is arranged right above the conical detection titration bottle through a titration frame; a tap switch is arranged on the titration frame; the detector is connected with the display; the power supply comprises a lamp power module, a detector power module and a display power module which are respectively connected with and supply power to the tungsten lamp, the detector and the display. The judging device can be used for accurately and quickly judging a titration end point. The device has the advantages of simplicity in operation, high stability and wide application scope.
Description
Technical field
The invention belongs to chemical analysis instrument technical field, particularly to a kind of spectrophotometric titration endpoint device,
This device is by the change of solution colour to be measured in monitoring titration analytic process, thus quick and precisely determines dripping in titrimetry
Determine terminal.
Background technology
Titrimetry is also referred to as volumetric analysis, is the analysis side of a kind of maturation measuring content of material by the mode of titration
Method, has a very wide range of applications in industry, agricultural, environment, medicine and other fields.In titration process, need according to indicator
Discoloration judge that titration end-point, the method for traditional judgement titration end-point mainly have two kinds: one is dependency analysis personnel
Naked eyes judge；Another kind is that the hop according to electrode potential judges, i.e. potentiometry.The first situation usually relies on analysis personnel's meat
Eye judges, different people judges can be different, even if same people also can be different to the judgement of titration end-point at different time, because of
And there is bigger random error.Second method is owing to having only to observe the potential change situation of titration process, it is not necessary to know
The absolute value of road terminal current potential, therefore compared with the first traditional method, exists by electrode property, liquid junction potential and solion
The impact such as activity is little, and the advantage not limited by solution colour, turbidity etc., but requires that tested test solution concentration typically should be greater than
10-3mol/L, limits the range of this law the most to a certain extent, can be only applied to acid base titration, small amounts also
Former titration, a small amount of sedimetry and a small amount of complexometry etc., i.e. potentiometry uses the most extensive.
The present invention uses spectrophotometric titration terminal judging instrument to monitor the change of titrated solution colour, specific set
Under wavelength, when titrated solution colour changes, the absorbance of spectrophotometric titration terminal judging instrument is as well as generation
Change, when arriving titration end-point, absorbance becomes the least or sports a certain higher value, is titration end-point.Because dripping
Setting analysis method all be use human eye to judge the color of titration end-point, so artificial random error, the therefore present invention can be produced
Different people can be reduced or error in judgement to titration end-point time same people's different time carries out titrimetry, so that measuring more
Accurately.And present invention can apply in all titrimetry, there is titration end-point accuracy of judgement, simple to operate, good stability
Etc. feature.
Summary of the invention
It is an object of the invention to overcome the defect of prior art, it is provided that a kind of spectrophotometric titration endpoint device.
The present invention is achieved in that a kind of spectrophotometric titration endpoint device, including light source, monochromator, optical fiber,
Taper detection titration bottle, detector, display and power supply；Light source is made up of tungsten lamp, monochromator include entrance slit, lens first,
Grating, lens second and exit slit, source alignment entrance slit, after entrance slit, alignment arranges lens first, grating, thoroughly successively
Mirror second and exit slit, exit slit is by the drop reaction district of optical fiber align taper detection titration bottle, and alignment is arranged on cone
The detector of shape detection titration bottle another side；By titration stand, burette is installed, on burette directly over taper detection titration bottle
It is provided with plug switch；Detector is connected to display；Power supply includes lamp power module, detector power module and display electricity
Source module, lamp power module is connected to tungsten lamp, and detector power module is connected to detector, and display power supply module is connected to show
Show device.
Described tungsten lamp is for providing satisfactory complex light for monochromator.
Described entrance slit is the passage that complex light enters monochromator, and the complex light that entrance slit exports is become by lens first
Collimated light beam, then collimated light beam is admitted to grating, then is utilized diffraction of light and interference effect to resolve into monochromatic light by grating,
This monochromatic light is focused to exit slit and exports by rear lens second, thus completes the complex light launched by light source and resolve into list
Coloured light, and therefrom select the monochromatic process of any wavelength.
Described optical fiber for being transferred to taper detection titration bottle by the monochromatic light that monochromator exports.
Described taper detection titration bottle is used for holding solution to be measured, when needing titration, opens plug switch, in burette
Standard solution instills taper detection titration bottle, and with solution generation chemical reaction to be measured, the color of solution to be measured can change.
Electrooptical device selected by described detector, and the optical signal that be will transmit through taper detection titration bottle by photoelectric effect is turned
Become the measurable signal of telecommunication, i.e. absorbance, then absorbance result is shown over the display.
Described lamp power module, detector power module and display power supply module, be respectively the tungsten lamp of correspondence, detector
It is powered with display.
The change of the color change absorbance of titration end-point is quantified by apparatus of the present invention, thus avoids human eye to judge
The random error that titration end-point produces, finally can accurately, quickly judge titration end-point, and this device is simple to operate, stability
Good, widely applicable.
Accompanying drawing explanation
Fig. 1 is the general frame of the spectrophotometric titration endpoint device of the present invention.
Fig. 2 is the detailed diagram of the spectrophotometric titration endpoint device of the present invention.
Fig. 3 is the index path of the spectrophotometric titration endpoint device of the present invention.
Fig. 4 is the structure chart of the taper detection titration bottle used in the embodiment of the present invention.
Labelling in figure: 1-tungsten lamp；2-entrance slit；3-lens first；4-grating；5-lens second；6-exit slit；7-light
Fine；8-taper detection titration bottle；9-detector；10-burette；11-plug switchs；12-titration stand.
Detailed description of the invention
Embodiment:
A kind of spectrophotometric titration endpoint device, including light source, monochromator, optical fiber 7, taper detection titration bottle 8, detector
9, display and power supply；Light source is made up of tungsten lamp 1, and monochromator includes entrance slit 2, lens first 3, grating 4, lens second 5 and goes out
Penetrating slit 6, source alignment entrance slit 2, entrance slit 2 alignment the most successively arranges lens first 3, grating 4, lens second 5 and goes out
Penetrating slit 6, toriconical is detected the drop reaction district of titration bottle 8 by exit slit 6 by optical fiber 7, and alignment is arranged on taper inspection
Survey the detector 9 of titration bottle 8 another side；By titration stand 12, burette 10, burette are installed directly over taper detection titration bottle 8
Plug switch 11 it is provided with on 10；Detector 9 is connected to display；Power supply include lamp power module, detector power module and
Display power supply module, lamp power module is connected to tungsten lamp 1, and detector power module is connected to detector 9, display power supply mould
Block is connected to display.
Described tungsten lamp 1 is for providing satisfactory complex light for monochromator.
Described entrance slit 2 enters the passage of monochromator, the complex light that entrance slit 2 is exported by lens first 3 for complex light
Becoming collimated light beam, then collimated light beam is admitted to grating 4, then is utilized diffraction of light and interference effect to resolve into list by grating 4
Coloured light, this monochromatic light is focused to exit slit 6 and exports by last lens second 5, thus completes launched by light source compound
Photolysis monochromatizing light, and therefrom select the monochromatic process of any wavelength.
Described optical fiber 7 for being transferred to taper detection titration bottle 8 by the monochromatic light that monochromator exports.
Described taper detection titration bottle 8 is used for holding solution to be measured, when needing titration, opens plug switch 11, burette
Standard solution in 10 instills taper detection titration bottle 8, and with solution generation chemical reaction to be measured, the color of solution to be measured can occur
Change.
Electrooptical device selected by described detector 9, be will transmit through the optical signal of taper detection titration bottle 8 by photoelectric effect
It is transformed into the measurable signal of telecommunication, i.e. absorbance, then absorbance result is shown over the display.
Described lamp power module, detector power module and display power supply module, be respectively the tungsten lamp 1 of correspondence, detection
Device 9 and display are powered.
The spectrophotometric titration endpoint device of the present embodiment runs according to below scheme:
(1) switching on power, tungsten lamp 1 sends complex light and is radiated in lens first 3 through entrance slit 2, and lens first 3 is by entrance slit 2
The complex light of output becomes collimated light beam, and then collimated light beam is admitted to grating 4, and complex light is resolved into monochromatic light, so by grating 4
Focus to exit slit 6, then the position by regulation exit slit 6, obtain required wavelength by monochromatic light by lens second 5
Monochromatic light, monochromatic light transmits to taper detection titration bottle 8 through optical fiber 7.
(2) pre-add indicator in taper detection titration bottle 8, makes the solution to be measured in taper detection titration bottle 8 present face
Color, detector 9 is able to detect that the absorbance of this solution to be measured, opens the plug switch 11 on burette 10, and control standard is dripped
Determine solution to instill in taper detection titration bottle 8, make the solution to be measured in taper detection titration bottle 8 shoal until colourless or become
Another kind of color, the corresponding absorbance that detector 9 detects is a least constant absorbance or the biggest constant absorbance,
It is titration end-point this moment.
Claims (1)
1. a spectrophotometric titration endpoint device, it is characterised in that this spectrophotometric titration endpoint device includes light
Source, monochromator, optical fiber, taper detection titration bottle, detector, display and power supply；Light source is made up of tungsten lamp, monochromator include into
Penetrate slit, lens first, grating, lens second and exit slit, source alignment entrance slit, after entrance slit, be directed at setting successively
Lens first, grating, lens second and exit slit, exit slit detects the drop reaction district of titration bottle by optical fiber align taper,
And it is directed at the detector being arranged on taper detection titration bottle another side；Installed by titration stand directly over taper detection titration bottle and drip
Fixed tube, burette is provided with plug switch；Detector is connected to display；Power supply includes lamp power module, detector power supply
Module and display power supply module, lamp power module is connected to tungsten lamp, and detector power module is connected to detector, display electricity
Source module is connected to display；
Described tungsten lamp is for providing satisfactory complex light for monochromator；
Described entrance slit is the passage that complex light enters monochromator, and the complex light that entrance slit exports is become parallel by lens first
Light beam, then collimated light beam is admitted to grating, then is utilized diffraction of light and interference effect to resolve into monochromatic light, the most thoroughly by grating
This monochromatic light is focused to exit slit and exports by mirror second, thus completes the complex light launched by light source and resolve into monochrome
Light, and therefrom select the monochromatic process of any wavelength；
Described optical fiber for being transferred to taper detection titration bottle by the monochromatic light that monochromator exports；
Described taper detection titration bottle is used for holding solution to be measured, when needing titration, opens plug switch, the standard in burette
Solution instills taper detection titration bottle, and with solution generation chemical reaction to be measured, the color of solution to be measured can change；
Electrooptical device selected by described detector, and the optical signal that be will transmit through taper detection titration bottle by photoelectric effect is transformed into
The measurable signal of telecommunication, i.e. absorbance, then show absorbance result over the display；
Described lamp power module, detector power module and display power supply module, be respectively corresponding tungsten lamp, detector and show
Show that device is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610942191.2A CN106323972A (en) | 2016-10-26 | 2016-10-26 | Judging device for spectrophotometric titration end point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610942191.2A CN106323972A (en) | 2016-10-26 | 2016-10-26 | Judging device for spectrophotometric titration end point |
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| Publication Number | Publication Date |
|---|---|
| CN106323972A true CN106323972A (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610942191.2A Pending CN106323972A (en) | 2016-10-26 | 2016-10-26 | Judging device for spectrophotometric titration end point |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346297A (en) * | 2019-07-26 | 2019-10-18 | 安徽科技学院 | One kind studying liquid photo-sensitive characteristic detector based on visible light |
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| CN2118989U (en) * | 1992-03-13 | 1992-10-14 | 高天龙 | Automatic titration instrument |
| CN2120336U (en) * | 1992-04-23 | 1992-10-28 | 高天龙 | Photometric titrator |
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| CN101819137A (en) * | 2010-04-28 | 2010-09-01 | 成都市信达温度测控技术有限公司 | Urinary iodine tester and analysis method thereof |
| CN201689050U (en) * | 2009-09-04 | 2010-12-29 | 中国环境科学研究院 | Fluophotometer capable of detecting light absorption or light transmission |
| CN201885799U (en) * | 2010-09-21 | 2011-06-29 | 尤尼柯（上海）仪器有限公司 | Monochromator optical path structure system of UV-2102PC type ultraviolet and visible spectrophotometer |
| CN103940946A (en) * | 2014-04-15 | 2014-07-23 | 中国科学院青海盐湖研究所 | Mass titration device with titration protective component and titration method |
| CN204008443U (en) * | 2014-07-02 | 2014-12-10 | 江苏海普功能材料有限公司 | A kind of ultraviolet spectrometer |
| CN106198532A (en) * | 2016-09-05 | 2016-12-07 | 江苏德林环保技术有限公司 | The dual wavelength autocontrol method of a kind of quick photometric titration and device |
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2016
- 2016-10-26 CN CN201610942191.2A patent/CN106323972A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084619U (en) * | 1989-08-02 | 1991-09-11 | 上海新光内衣染织厂 | Automatic titration analysis device |
| CN2118989U (en) * | 1992-03-13 | 1992-10-14 | 高天龙 | Automatic titration instrument |
| CN2120336U (en) * | 1992-04-23 | 1992-10-28 | 高天龙 | Photometric titrator |
| CN1114414A (en) * | 1994-07-08 | 1996-01-03 | 大庆石油学院 | Method for detecting micro soap-like matter |
| CN1410762A (en) * | 2002-11-28 | 2003-04-16 | 华南理工大学 | Photometry of paper pulp suspension liquid colloid dissolving electric charge |
| CN201392316Y (en) * | 2008-06-27 | 2010-01-27 | 中国建筑材料检验认证中心 | Carbon dioxide photoelectric titration apparatus and carbon dioxide photoelectric titration analytical instrument |
| CN201689050U (en) * | 2009-09-04 | 2010-12-29 | 中国环境科学研究院 | Fluophotometer capable of detecting light absorption or light transmission |
| CN101819137A (en) * | 2010-04-28 | 2010-09-01 | 成都市信达温度测控技术有限公司 | Urinary iodine tester and analysis method thereof |
| CN201885799U (en) * | 2010-09-21 | 2011-06-29 | 尤尼柯（上海）仪器有限公司 | Monochromator optical path structure system of UV-2102PC type ultraviolet and visible spectrophotometer |
| CN103940946A (en) * | 2014-04-15 | 2014-07-23 | 中国科学院青海盐湖研究所 | Mass titration device with titration protective component and titration method |
| CN204008443U (en) * | 2014-07-02 | 2014-12-10 | 江苏海普功能材料有限公司 | A kind of ultraviolet spectrometer |
| CN106198532A (en) * | 2016-09-05 | 2016-12-07 | 江苏德林环保技术有限公司 | The dual wavelength autocontrol method of a kind of quick photometric titration and device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346297A (en) * | 2019-07-26 | 2019-10-18 | 安徽科技学院 | One kind studying liquid photo-sensitive characteristic detector based on visible light |
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Application publication date: 20170111 |