CN2308086Y - Long optical path optical absorption cell for spectrophotometer - Google Patents
Long optical path optical absorption cell for spectrophotometer Download PDFInfo
- Publication number
- CN2308086Y CN2308086Y CN 97239872 CN97239872U CN2308086Y CN 2308086 Y CN2308086 Y CN 2308086Y CN 97239872 CN97239872 CN 97239872 CN 97239872 U CN97239872 U CN 97239872U CN 2308086 Y CN2308086 Y CN 2308086Y
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- absorption cell
- joint
- fluorine
- utility
- model
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Abstract
The utility model discloses a photoconductive absorption cell with a long optical path for a spectrophotometer, which is mainly composed of lenses (1), joints (3, 5), a spiral fluorine containing pipe (4) and a bracket, wherein the joints (3, 5) are connected with both ends of the fluorine containing pipe (4), the lenses (1) are fixed in the joints by nuts (7), and the top parts of the two joints are respectively provided with a sample inlet (2) and a sample outlet (6). The utility model adopts a long optical path to enhance the sensitivity of an instrument, and the sensitivity is raised by 2 to 3 grades. The external shape and the structural shape of the utility model are matched with a dark room of the absorption cell for the 7520 type and 751 type spectrophotometers commonly used at home. The utility model has convenient use, good repeatability and low price.
Description
The utility model relates to a kind of spectrophotometry, particularly a kind ofly is used for spectrophotometric long light path photoconduction absorption cell.
Spectrophotometer, because it is simple in structure, cheap, usable range is wide, thereby gets widespread usage at home and abroad.At present, general spectrophotometer is done sample cell with the cuvette of common several centimeter length, and light path is short, and sensitivity for analysis is everlasting on the ppm order of magnitude, can only analyze major constituents.If will analyze trace and the trace components of content in ppb and ppt level, then need be by some more expensive large-scale instruments.
The purpose of this utility model is to substitute common cuvette with long light path photoconduction absorption cell, improve spectrophotometric sensitivity, thereby make this General Instrument cheap, applied range can analyze trace and trace components, reduce the expense in analyzing, monitoring.
Technical solution of the present utility model is achieved in that a kind of spectrophotometric long light path photoconduction absorption cell that is used for, and it is made up of lens (1), joint (3,5) and spiral fluorine-containing pipe (4) and support (9).Joint (3) and (5) are connected to the two ends of the fluorine-containing pipe of spirality (4), and lens (1) are fixed in joint (1) and (5) with nut (7), and joint (3) upper end is provided with injection port (2), and joint (5) upper end is provided with outlet (6).The photoconduction absorption cell is fixedly mounted on the support (9).Fluorine-containing pipe (4) is about on 2～4cm male-pipe (8) around diameter, and this threaded line pipe is fixed on the support (9), and joint (3) and (5) are fixedly mounted on the support (9).
Fluorine-containing pipe (4) can select for use diameter to be about 2～3mm, and polyvinyl fluoride tube is made.When using in the ultraviolet region, the length of fluorine-containing pipe is 50cm～1m, and when using in the visible range, fluorine-containing length of tube is 1m～2m.
The utlity model has following advantage:
1. the utility model has changed the thinking of traditional raising sensitivity.The normal method that adopts of people was to manage to improve molar absorptivity in the past, improved absorbance with this.The utility model adopts a kind of new method, and the light path that promptly extends improves instrumental sensitivity.Utilize the optical fiber light-guiding principle, allow light in the photoconduction absorption cell, realize total reflection, thereby make sensitivity improve 2～3 orders of magnitude.
2. cheap, easy to use, the favorable reproducibility of the utility model.Physical dimension and planform are with domestic 7520 types commonly used, 751 type spectrophotometer absorption cell darkrooms match at present.Thereby can be both easy, use easily again on common spectrophotometer, carry out trace and trace analysis, thereby saved the required expense of import large-sized analytic instrument greatly.
Below in conjunction with accompanying drawing the utility model is described in further detail:
Fig. 1 is used for spectrophotometric the utility model structural representation.
Fig. 2 is that the utility model master looks synoptic diagram.
Fig. 3 is that synoptic diagram is looked on the utility model right side.
In the accompanying drawing:
1-lens 2-injection port 3, the fluorine-containing pipe 6-of 5-joint 4-outlet 7-nut 8-male-pipe 9-support 10-light source 11-monochromator 12-detecting device 13-amplifier 14-reading device
Embodiment:
As shown in Figure 1.Behind long light path photoconduction absorption cell replacement cuvette, the spectrophotometer course of work is: light source 10 is radiated on the monochromator 11, enter the photoconduction absorption cell by the monochromatic light after monochromator 11 chromatic dispersions, focus on through lens 1, by joint 3, total reflection takes place in the spirality polyvinyl fluoride tube 4 of solution to be measured is housed, the light after the absorption enters detecting device 12 by the lens in the joint 51 with parallel beam and is converted into electric signal, amplify by amplifier 13, read indicating value by reading device 14.
Among Fig. 1, frame of broken lines inside is divided into the utility model photoconduction absorption cell structural representation.
The utility model is to be made of photoconduction absorption cell and support two parts.The photoconduction absorption cell by lens 1, joint 3 and 5 and the polyvinyl fluoride tube 4 of spirally-wound form.Joint 3 and 5 is connected to polyvinyl fluoride tube 4 two ends, and lens 1 usefulness nut 7 is fixed on joint 1 and 5.Joint 3 upper ends are provided with injection port 2, and joint 5 upper ends are provided with outlet 6.
As Fig. 2, shown in Figure 3.The photoconduction absorption cell is fixedly mounted on the support 9.Purpose is to fix this absorption cell, guarantees absorption cell incident light and emergent light and former instrument coupling, guarantees to analyze data reappearance.Be wrapped in diameter with diameter 2～3mm polyvinyl fluoride tube and be about on the male-pipe 8 of 4cm, this pipe is fixed on the support 9, and joint 3 and 5 is fixedly mounted on the support of male-pipe both sides, and makes two joints on sustained height and same horizontal line.
When analyzing with the ultraviolet region, the polyvinyl fluoride length of tube is generally elected 50cm～1m as, and when analyzing with the visible range, the polyvinyl fluoride length of tube is generally elected 1～2m as.
When analyzing, solution to be measured injects the photoconduction absorption cell from injection port 2.
The utility model had both adapted to the flow injection sampling system, also was adapted to common sampling system.
The result that the utility model and common light splitting photometry are measured Trace Chromium in Natural Water contrasts as follows:
With the long optical waveguide absorption cell of 100cm, the range of linearity of measuring chromium (VI) is 0.2～20 μ g/ L, linear relative coefficient are 0.9991, and with the 1cm absorption cell relatively, remolding sensitivity adopts the 1cm ratio The look ware improves 114 times, i.e. sensitivity improves two orders of magnitude. 6 have been measured with this utility model Determination of Trace Chromium in the natural water-like (VI), the relative standard deviation of 6 mensuration is 3.8%, the average recovery Rate 102%.
Claims (4)
1. one kind is used for spectrophotometric long light path photoconduction absorption cell, it is characterized in that: it is made up of lens (1), joint (3,5) and spiral fluorine-containing pipe (4) and support (9), joint (3) and (5) are connected to the two ends of fluorine-containing pipe (4), lens (1) are fixed in joint (1) and (5) with nut (7), joint (3) top is provided with injection port (2), joint (5) top is provided with outlet (6), and joint (3,5) and the fluorine-containing pipe of spirality (4) are fixedly mounted on the support (9) together.
2. absorption cell according to claim 1 is characterized in that: when used the ultraviolet region, the length of fluorine-containing pipe was 50cm～1m, and when the visible range was used, the length of fluorine-containing pipe was 1～2m.
3. absorption cell according to claim 1 and 2 is characterized in that: it is that the poly-fluorine hexene pipe of 2～3mm is made that fluorine-containing pipe (4) can be selected diameter for use.
4. absorption cell according to claim 1 is characterized in that: fluorine-containing pipe (4) is wrapped in diameter and is about on the male-pipe (8) of 2～4cm, and this threaded line pipe (8) is fixed on the support (9), and joint (3) and (5) are fixedly mounted on this support (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97239872 CN2308086Y (en) | 1997-09-18 | 1997-09-18 | Long optical path optical absorption cell for spectrophotometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97239872 CN2308086Y (en) | 1997-09-18 | 1997-09-18 | Long optical path optical absorption cell for spectrophotometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2308086Y true CN2308086Y (en) | 1999-02-17 |
Family
ID=33949770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97239872 Expired - Fee Related CN2308086Y (en) | 1997-09-18 | 1997-09-18 | Long optical path optical absorption cell for spectrophotometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2308086Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478498A (en) * | 2011-04-22 | 2012-05-30 | 吴守清 | Super-long cuvette system for color comparator |
| CN105181645A (en) * | 2015-10-10 | 2015-12-23 | 太原科技大学 | Screw-type multi-optical-path device for measuring gas concentration |
-
1997
- 1997-09-18 CN CN 97239872 patent/CN2308086Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478498A (en) * | 2011-04-22 | 2012-05-30 | 吴守清 | Super-long cuvette system for color comparator |
| CN105181645A (en) * | 2015-10-10 | 2015-12-23 | 太原科技大学 | Screw-type multi-optical-path device for measuring gas concentration |
| CN105181645B (en) * | 2015-10-10 | 2017-10-20 | 太原科技大学 | A kind of many optical path devices of screw type for measuring gas concentration |
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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 |