CN206095955U - Titration end point judges device - Google Patents
Titration end point judges device Download PDFInfo
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- CN206095955U CN206095955U CN201621166462.1U CN201621166462U CN206095955U CN 206095955 U CN206095955 U CN 206095955U CN 201621166462 U CN201621166462 U CN 201621166462U CN 206095955 U CN206095955 U CN 206095955U
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- titration
- detector
- lens
- display
- power module
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Abstract
The utility model discloses a titration end point judges device. The device includes that light source, monochromator, optic fibre, toper detect titration bottle, detector, display and power, the light source comprises tungsten lamp, and the monochromator includes entrance slit, the first, grating on the lens, lens second and exit slit, and entrance slit is aimed at to the light source, and entrance slit aims at in proper order at the back and sets up the first, grating on the lens, lens second and exit slit, and the exit slit passes through the drop reaction district that the fiber alignment toper detected titration bottle to aim at and set up the detector that detects the titration bottle another side in the toper, the buret is installed through titrating the frame directly over detecting titration bottle to the toper, is provided with the cock switch on the buret, the detector is connected to the display, the power includes lamp power module, detector power module and display power module, is connected to corresponding tungsten lamp, detector and display respectively. The utility model discloses a device is accurate, quick to titration end point's judgement, and the device simple structure, good, the wide applicability of stability.
Description
Technical field
This utility model belongs to chemical analysis instrument technical field, more particularly to a kind of titration end-point judgment means.
Background technology
Titrimetry is also referred to as volumetric analysis, is a kind of ripe analysis side that content of material is determined with 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 titration end-point, the method for traditional judgement titration end-point mainly has two kinds：One kind is dependency analysis personnel
Naked eyes judge；Another kind is judged according to the hop of electrode potential, i.e. potentiometry.The first situation usually relies on analysis personnel's meat
Eye judges that different people judges can be different, even if judgement of the same people in different time to titration end-point also can be different, because
And there is larger random error.Second method is due to only needing 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, exist by electrode property, liquid junction potential and solion
Activity etc. affects little, and not by the advantage of the restrictions such as solution colour, turbidity, but require that tested test solution concentration typically should be greater than
10-3mol/L, therefore the use range of this law is limited 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 is not using extensive.
This utility model monitors the change of titrated solution colour using spectrophotometric titration terminal judging instrument, in setting
Under specific wavelength, when titrated solution colour changes, the absorbance of spectrophotometric titration terminal judging instrument also can be with
Change, when titration end-point is reached, absorbance is changed into very little or sports a certain higher value, as titration end-point.Cause
For titrimetry be all using human eye judging the color of titration end-point, so artificial random error can be produced, therefore this
Error in judgement when utility model can reduce different people or same people's different time carries out titrimetry to titration end-point, so as to
Make measurement more accurate.And this utility model is can be applicable in all titrimetry, with titration end-point accuracy of judgement, operation letter
The features such as single, good stability.
The content of the invention
The purpose of this utility model is to provide a kind of titration end-point judgment means.
What this utility model was realized in：
A kind of titration end-point judgment means, including light source, monochromator, optical fiber, taper detection titration bottle, detector, display
Device and power supply；Light source is made up of tungsten lamp, and monochromator includes entrance slit, lens first, grating, lens second and exit slit, light source
Alignment entrance slit, behind entrance slit, alignment arranges lens first, grating, lens second and exit slit successively, and exit slit leads to
The drop reaction area that optical fiber align taper detects titration bottle is crossed, and alignment is arranged on the detection of taper detection titration bottle another side
Device；Burette is installed by titration stand directly over taper detection titration bottle, plug switch on burette, is provided with；Detector connects
To display；Power supply includes lamp power module, detector power module and display power supply module, and lamp power module is connected to tungsten
Lamp, detector power module are connected to detector, and display power supply module is connected to display.
Titration end-point judgment means of the present utility model are by the color change of titration end-point with the change amount of carrying out of absorbance
Change, it is accuracy of judgement to titration end-point, quick, and the apparatus structure is simple, good stability, widely applicable.
Description of the drawings
Fig. 1 is the general frame of titration end-point judgment means of the present utility model.
Fig. 2 is the detailed diagram of titration end-point judgment means of the present utility model.
Fig. 3 is the index path of titration end-point judgment means of the present utility model.
Fig. 4 is the structure chart that the taper used in this utility model embodiment detects titration bottle.
Labelling in figure：1- tungsten lamps；2- entrance slits；3- lens first；4- gratings；5- lens second；6- exit slits；7- light
It is fine；8- tapers detect titration bottle；9- detectors；10- burettes；11- plugs are switched；12- titration stands.
Specific embodiment
Embodiment：
A kind of titration end-point judgment means, including it is light source, monochromator, optical fiber 7, taper detection titration bottle 8, detector 9, aobvious
Show device and power supply；Light source is made up of tungsten lamp 1, and monochromator includes that entrance slit 2, lens first 3, grating 4, lens second 5 and outgoing are narrow
Seam 6, source alignment entrance slit 2, alignment setting lens first 3, grating 4, lens second 5 and outgoing are narrow successively below for entrance slit 2
Seam 6, exit slit 6 detect the drop reaction area of titration bottle 8 by optical fiber 7 to toriconical, and alignment is arranged on taper detection drop
Determine the detector 9 of 8 another side of bottle；Burette 10 is installed by titration stand 12 directly over taper detection titration bottle 8, on burette 10
It is provided with plug switch 11；Detector 9 is connected to display；Power supply includes lamp power module, detector power module and display
Device power module, lamp power module are connected to tungsten lamp 1, and detector power module is connected to detector 9, and display power supply module connects
It is connected to display.
The tungsten lamp 1 is used to provide satisfactory complex light for monochromator.
The entrance slit 2 enters the passage of monochromator, the complex light that entrance slit 2 is exported by lens first 3 for complex light
It is changed into collimated light beam, then collimated light beam is admitted to grating 4, then is resolved into list using diffraction of light and interference effect by grating 4
The monochromatic light is focused to exit slit 6 and is exported by coloured light, last lens second 5, so as to complete being combined that light source is launched
Photolysis monochromatizing light, and therefrom select the monochromatic process of any wavelength.
The optical fiber 7 is transferred to taper detection titration bottle 8 for the monochromatic light for exporting monochromator.
The taper detection titration bottle 8 is used to hold solution to be measured, when needing titration, opens plug switch 11, burette
Standard solution in 10 instills taper detection titration bottle 8, and chemical reaction occurs with solution to be measured, and the color of solution to be measured can occur
Change.
The detector 9 selects electrooptical device, will transmit through the optical signal that taper detects 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.
The lamp power module, detector power module and display power supply module, respectively corresponding tungsten lamp 1, detection
Device 9 and display are powered.
The titration end-point judgment means of the present embodiment are run according to below scheme：
(1) switch on power, tungsten lamp 1 sends complex light Jing entrance slit 2 and is radiated in lens first 3, lens first 3 will be incidence narrow
The complex light of 2 output of seam is changed into collimated light beam, and then collimated light beam is admitted to grating 4, and complex light is decomposed monochromatizing by grating 4
Light, then Jing lens second 5 monochromatic light is focused to into exit slit 6, then by adjusting the position of exit slit 6, required for obtaining
The monochromatic light of wavelength, monochromatic light Jing optical fiber 7 are transmitted to taper and detect titration bottle 8.
(2) the pre-add indicator in taper detection titration bottle 8, makes the solution presentation face to be measured in taper detection titration bottle 8
Color, detector 9 are able to detect that the absorbance of the solution to be measured, open the plug switch 11 on burette 10, control standard drop
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 is detected is the constant absorbance of a very little or very big constant absorbance,
Titration end-point is this moment.
Claims (1)
1. a kind of titration end-point judgment means, it is characterised in that the titration end-point judgment means include 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 incidence
Slit (2), lens first (3), grating (4), lens second (5) and exit slit (6), source alignment entrance slit (2), entrance slit
(2) alignment arranges lens first (3), grating (4), lens second (5) and exit slit (6) successively below, and exit slit (6) is by light
Fine (7) detect the drop reaction area of titration bottle (8) to toriconical, and alignment is arranged on taper detection titration bottle (8) another side
Detector (9)；Burette (10) is installed by titration stand (12) directly over taper detection titration bottle (8), burette is set on (10)
It is equipped with plug switch (11)；Detector (9) is connected to display；Power supply includes lamp power module, detector power module and shows
Show device power module, lamp power module is connected to tungsten lamp (1), and detector power module is connected to detector (9), display power supply
Module is connected to display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621166462.1U CN206095955U (en) | 2016-10-26 | 2016-10-26 | Titration end point judges device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621166462.1U CN206095955U (en) | 2016-10-26 | 2016-10-26 | Titration end point judges device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206095955U true CN206095955U (en) | 2017-04-12 |
Family
ID=58486018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621166462.1U Expired - Fee Related CN206095955U (en) | 2016-10-26 | 2016-10-26 | Titration end point judges device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206095955U (en) |
-
2016
- 2016-10-26 CN CN201621166462.1U patent/CN206095955U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20171026 |
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| CF01 | Termination of patent right due to non-payment of annual fee |