CN2466656Y - Non-interference photometric titration device - Google Patents
Non-interference photometric titration device Download PDFInfo
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- CN2466656Y CN2466656Y CN 01216670 CN01216670U CN2466656Y CN 2466656 Y CN2466656 Y CN 2466656Y CN 01216670 CN01216670 CN 01216670 CN 01216670 U CN01216670 U CN 01216670U CN 2466656 Y CN2466656 Y CN 2466656Y
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- titration
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- titration cell
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Abstract
The utility model relates to a non-interference photometric titration reaction device which comprises a titration cell, a stirring device, and a liquid inlet and outlet pipe. The utility model is characterized in that an incident optical source (6) and an optical-electrical converter (7) are respectively arranged on the side wall of the titration cell (1); a sieving net type optical channel (5) which is positioned between the incident optical source (6) and the optical-electrical converter (7) is arranged in the titration cell (1); the upper part of the titration cell (1) is provided with a sample inlet (10). The utility model can guarantee the homogeneous mixing of titration liquid and can avoid the luminosity interference caused by the bubble generation. The utility model is not only suitable for the operation of conventional indicator titration, but also can judge the end point of titration accurately and stably under the condition that titrating solution is heated or boils.
Description
The utility model belongs to the titrimetry instrument, and particularly relating to the indicator change color is the titrimetry device of endpoint.
Various automatic and semi-automatic titrators are a lot of both at home and abroad at present, as conductance titration, radio frequency titration, coulometric titration etc.These analytical approachs mainly are to select various indicator electrodes (as glass electrode etc.), change according to electrode potential or current signal to show, determine titration end-point.But because indicator electrode must insert in the titrated sample, thereby, be subject to the interference and the pollution of complex sample component, as fermentation liquor, food, beverage etc., be very restricted in actual applications.According to the indicator change color is that the titrimetry of endpoint is the most frequently used method, and also extensively adopting with the indicator in each grade standard of international standard and China is the titrimetry method of endpoint.At present, this titration process and endpoint mainly are to finish by manually-operated, and visual titration liquid consumes volume, Calculation results then.The operation of this method is loaded down with trivial details, and comparatively time-consuming, personal error is bigger sometimes, particularly to muddy sample or color darker sample, the change color of indicator is sensitive inadequately during terminal point, judges that terminal point brings a lot of difficulties for range estimation, influences the accuracy of titration.Some sample must just can carry out titration through processing such as activated carbon decolorizings, brings a lot of troubles for analytical control and production control.External more existing autotitrators can carry out photometric titration, but interference free performance is not high, and particularly under the situation of vs heating, accuracy is relatively poor.And a lot of drop reactions are to finish under heating state, so can't realize at present using widely.
The purpose of this utility model is exactly the defective at prior art, and a kind of interference-free photometric titration reaction unit is provided, and is characterized in quick, accurate, simple to operate, easy to use, is not subjected to the influence of sample intrinsic colour, turbidity and constituent.Under the situation of vs heating or boiling, still can accurately, stably judge titration end-point.
The utility model is according to the principle design of photometric titration, incident light source and photosensitive device are installed on the titration cell both sides, in the pond, be provided with an optical channel, detect the voltage that photosensitive device produces by automatic control system, along with the variation of liquid color in the pond in the titration process, detecting voltage also correspondingly changes, in titration end-point, the sudden change of color is consistent with the sudden change of voltage, determines titration end-point thus, according to the consumption of titer, calculate the content of titrated sample.
The utility model drop reaction device comprises titration cell, stirring apparatus, liquid inlet and outlet piping, it is characterized in that on the titration cell sidewall, being respectively equipped with incident light source and photoelectric commutator, be provided with the optical channel of a screen cloth type between incident light source in titration cell and the photoelectric commutator, it does not promptly hinder flowing of liquid in the titration cell, can avoid heating the heterochromatic light that bubble etc. sends again and disturb; Top is injection port, and available micro syringe injects titration cell with sample; Other is located at titration cell sidewall or bottom as liquid inlet and outlet pipings such as vs inlet, reagent inlet, filter washing water inlet and evacuation ports, can add reagent, titer, vs automatically, finish and clean and emptying with peristaltic pump; There are temperature sensor and liquid heater in the titration cell inboard, adjusts fluid temperature as required; Magnetic stirrer is arranged at the titration cell bottom, impels titration liquid evenly to mix.
Characteristics of the present utility model are fast, accurately, are not subjected to the influence of sample intrinsic colour, turbidity and constituent.The operator only needs with syringe micro-example to be injected titration cell, just can automatically finish titration process, and the connection automaton can show automatically and print titration results, and is simple to operate, easy to use.A kind of screen cloth type optical channel particularly has been installed in titration cell, has promptly been guaranteed the even mixing of titration liquid, also avoided the issuable luminosity of heating bubble to disturb.Not only be suitable for conventional indicator titration operation, and under the situation of vs heating or boiling, still can accurately, stably judge titration end-point.Have higher actual application value and wide application market prospect.
The utility model is according to a kind of novel volumetric apparatus of photometric titration principle design, and its characteristics have the following aspects:
1, simple to operate, only needing with micro syringe sample to be injected titration cell during titration can automatically finish;
2, humidity control system is arranged, can set titration temperature according to the titration needs with interior at 100 ℃;
3, screen cloth type optical channel is arranged, titration does not influence the accuracy of photometric titration terminal point under liquid boiling;
4, the result is accurate, and repeated detection error is less than manual titration;
5, finding speed is fast, and the titration cycle was particularly suitable for the mensuration of batch samples less than 3 minutes;
6, antijamming capability is strong, is not subjected to the influence of color sample and turbidity;
7, testing cost is lower, and the titration reagent consumption is lower than conventional method;
8, the instrument production cost is low, and stable performance is applied widely, can be applicable to commercial production control, analytical control, and fields such as scientific research, teaching have vast market prospect and significant social economic benefit.
Below in conjunction with accompanying drawing and with it is that the utility model is described in further detail for embodiment:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a side-looking structural representation shown in Figure 1;
Fig. 3 is circuit theory diagrams of the present utility model;
Among the figure: the 1st, titration cell, the 2nd, vs inlet, the 3rd, reagent inlet, the 4th, filter washing water inlet, the 5th, optical channel, the 6th, light source, the 7th, photoelectric commutator, the 8th, heat sensitive sensor, the 9th, waste liquid outlet, the 10th, injection port, the 11st, stirring motor, the 12nd, stirrer, the 13rd, liquid heating electrode.
In Fig. 1, outside the left and right sides of titration cell 1, be respectively equipped with incident light source 6 and photoelectric commutator 7, be provided with the optical channel 5 of a screen cloth type in titration cell 1, this passage 5 is between incident light source 6 and photoelectric commutator 7, and the trend of passage 5 is identical with light source 6 incident directions; Be to be connected on light source 6 entrance ports as passage 5 inlets promptly, then passage 5 outlets just are connected on photoelectric commutator 7 places.
At titration cell 1 upper top is injection port 10, and available micro syringe injects titration cell 1 with sample.Magnetic stirrer is arranged at the bottom at titration cell 1, titration liquid is evenly mixed, and stirrer 12 is arranged on the bottom in the titration cell 1, is that magnetic is connected with stirring motor 11 outside titration cell 1 bottom, be that stirrer 12 is a magnetisable material, the rotation axis of stirring motor 11 is a magnetic pole.
In Fig. 2, be provided with many liquid inlet and outlet pipings in both sides, titration cell 1 front and back, as vs inlet 2, reagent inlet 3, filter washing water inlet 4 and evacuation port 9, can add reagent, titer, vs automatically, finish and clean and emptying by above four mouths respectively by four peristaltic pumps; In titration cell 1 and/or outside also can be provided with temperature sensor 8 and liquid heating electrode 13, can adjust the fluid temperature in the titration cell 1 as required.
As Fig. 3, connect automatic control system at photoelectric commutator 7, comprise power circuit, control panel, display panel and mini-printer, can realize controlling turnover, fluid temperature, the stirring of titration cell liquid, the collection and the conversion of photovoltaic reaction information by setup program, work such as calculating as a result, demonstration and printing.
Claims (4)
1, a kind of interference-free photometric titration reaction unit, comprise titration cell, stirring apparatus, liquid inlet and outlet piping, it is characterized in that on the sidewall of titration cell (1), being respectively equipped with incident light source (6) and photoelectric commutator (7), in titration cell (1), be provided with the optical channel (5) of a screen cloth type, this passage is positioned between incident light source (6) and the photoelectric commutator (7), and the top of pond (1) is injection port (10).
2, interference-free photometric titration reaction unit according to claim 1 is characterized in that in the bottom of titration cell (1) magnetic stirrer being arranged.
3, interference-free photometric titration reaction unit according to claim 2 is characterized in that the stirrer (12) of said magnetic stirrer is arranged on the interior bottom of titration cell (1), and its stirring motor 11) be arranged on outside titration cell (1) bottom.
4, interference-free photometric titration reaction unit according to claim 1 and 2, it is characterized in that in titration cell (1) and/or outside also can be provided with temperature sensor (8) and liquid heater (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01216670 CN2466656Y (en) | 2001-02-28 | 2001-02-28 | Non-interference photometric titration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01216670 CN2466656Y (en) | 2001-02-28 | 2001-02-28 | Non-interference photometric titration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2466656Y true CN2466656Y (en) | 2001-12-19 |
Family
ID=33635047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01216670 Expired - Fee Related CN2466656Y (en) | 2001-02-28 | 2001-02-28 | Non-interference photometric titration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2466656Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606761A (en) * | 2015-12-23 | 2016-05-25 | 深圳市清时捷科技有限公司 | Reaction endpoint judgment device and five-step iodometry |
| CN107782843A (en) * | 2016-08-29 | 2018-03-09 | 开平市中青环保技术服务有限公司 | A kind of titer automatic gauge method in titrimetry using photoelectric measurement mode |
-
2001
- 2001-02-28 CN CN 01216670 patent/CN2466656Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606761A (en) * | 2015-12-23 | 2016-05-25 | 深圳市清时捷科技有限公司 | Reaction endpoint judgment device and five-step iodometry |
| CN107782843A (en) * | 2016-08-29 | 2018-03-09 | 开平市中青环保技术服务有限公司 | A kind of titer automatic gauge method in titrimetry using photoelectric measurement mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |