CN204649610U - A kind of twin-beam Atomic absorption mercury vapor analyzer - Google Patents
A kind of twin-beam Atomic absorption mercury vapor analyzer Download PDFInfo
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- CN204649610U CN204649610U CN201520276132.7U CN201520276132U CN204649610U CN 204649610 U CN204649610 U CN 204649610U CN 201520276132 U CN201520276132 U CN 201520276132U CN 204649610 U CN204649610 U CN 204649610U
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- atomic absorption
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Abstract
The utility model provides a kind of twin-beam Atomic absorption mercury vapor analyzer, the light comprising mercury characteristic spectral line that light source is launched transfers to first sensor through the first aperture, optical measurement pond and the first narrow band pass filter, arrives the second sensor through second orifice and the second narrow band pass filter; The light signal of detection is converted to the first electric signal and is sent to computing module by first sensor, and computing module calculates mercury vapour concentration according to the first electric signal; The light signal of detection is converted to the second electric signal and is sent to light source control module by the second sensor; The light source control module be connected with light source compare the second electric signal and for the standard signal of Calibrating source luminous intensity size and adjust the luminous intensity of light source.By the second sensor monitoring light source, and utilize light source control module to control the luminous intensity of light source, make the intensity of light source to maintain constant level, ensure that the stability of optical path light and then ensure mercury vapour measurement of concetration accuracy.
Description
Technical field
The utility model relates to mercury measurement of concetration technical field, particularly a kind of twin-beam Atomic absorption mercury vapor analyzer.
Background technology
Mercury is that one has hypertoxicity and volatile metallics, has very large harm, in use need to prevent it from leaking to human body and environment.Mercury vapor analyzer is the instrument of mercury concentration in a kind of conventional measurement solid, liquids and gases, and it utilizes the characteristic of mercury atom energy strong absorption 253.7 nanometer spectral line and designs.Existing mercury vapor analyzer is divided into single beam Atomic absorption mercury vapor analyzer and twin-beam Atomic absorption mercury vapor analyzer.Wherein single beam Atomic absorption mercury vapor analyzer has an absorption of sample pond, when there being mercury vapour by sample cell, detect light beam through being received by sensor behind absorption of sample pond, sensor sensed light signal is converted to electric signal and with do not have mercury vapour to be compared by electric signal during sample cell to calculate mercury vapour concentration.Cause because the change of light intensity all can be understood as that mercury atom absorbs, when the character of light source is unstable, when causing luminous intensity to change in measuring process, measurement result can be caused inaccurate.
Utility model content
Make it can not ensure the problem of test result for solving existing single beam Atomic absorption mercury vapor analyzer source character instability, the utility model provides a kind of twin-beam Atomic absorption mercury vapor analyzer.
The utility model provides a kind of twin-beam Atomic absorption mercury vapor analyzer, the light comprising mercury characteristic spectral line that light source is launched transfers to first sensor through the first aperture, optical measurement pond and the first narrow band pass filter, the light signal of detection is converted to the first electric signal and is sent to computing module by described first sensor, and described computing module calculates mercury vapour concentration according to described first electric signal and the demarcation signal for demarcating standard mercury vapour concentration; The light comprising mercury characteristic spectral line that described light source is launched arrives the second sensor through second orifice and the second narrow band pass filter; Comprise the light source control module be connected with described light source in addition; The light signal of detection is converted to the second electric signal and is sent to described light source control module by described second sensor; More described second electric signal of described light source control module and for the standard signal of Calibrating source luminous intensity size and adjust the luminous intensity of described light source.
By the light beam of the second sensor monitoring through second orifice and the second narrow band pass filter, and utilize light source control module to control the luminous intensity of light source, make the intensity of light source to maintain constant level, ensure that the stability of optical path light and then ensure mercury vapour measurement of concetration accuracy.
Preferably, between described first aperture and described optical measurement pond, also there is the first collimating mirror.
Preferably, between described second orifice and described second narrow band pass filter, also there is the second collimating mirror.
Preferably, described demarcation signal is obtained by described twin-beam Atomic absorption mercury vapor analyzer measurement standard sample.
Preferably, described first sensor and described second sensor are deep ultraviolet band sensor.
Preferably, described light source is low pressure mercury lamp.
Preferably, described first narrow band pass filter and described second narrow band pass filter are the narrow band pass filter that centre wavelength is 253.7nm.
Preferably, the two ends in described optical measurement pond are the logical light window of quartzy material.
Preferably, can have multiple described optical measurement pond, multiple described optical measurement pond serial is put.
Preferably, described optical measurement pond has air intake opening and gas outlet, and described gas outlet is provided with mercury vapour adsorbent equipment or mercury vapour solidification equipment.
Accompanying drawing explanation
Fig. 1 is the twin-beam Atomic absorption mercury vapor analyzer schematic diagram of the utility model embodiment.
Embodiment
For making those skilled in the art better understand the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the schematic diagram of the utility model embodiment twin-beam Atomic absorption mercury vapor analyzer.As can be seen from Figure 1, the mercury vapor analyzer in the present embodiment has optical path and monitoring light path two parts, and wherein monitoring light path achieves the monitor and forecast to light source 4 stability, and optical path measures the mercury vapour concentration in gas to be measured.
Optical path in the present embodiment has the first aperture 6, first collimating mirror 7, optical measurement pond 8, first narrow band pass filter 9 and first sensor 10, and above all parts successively order is arranged, and light source 4 is positioned over the first aperture side; Another optical path also has computing module.The light containing mercury characteristic spectral line that light source 4 sends is converted to parallel beam after the first aperture 6 and the first collimating mirror 7, parallel beam arrives first sensor 10 through behind optical measurement pond 8 and the first narrow band pass filter 9, the light signal of detection is converted to the first electric signal and the first electric signal is sent to computing module by first sensor 10, and computing module is according to size, the mercury vapour concentration utilized in the method calculating optical measuring cell 8 of logarithm operation of the demarcation signal for demarcating standard mercury vapour concentration of the first electric signal and storage inside.Demarcation signal is measured one or more standard model according to twin-beam Atomic absorption mercury vapor analyzer and is obtained, and the mercury also by weighing Different Weight passes into the measurement of optical measurement pond and obtains.
Can very simply expect, in above equipment, as long as the duty of each assembly on optical path and light source 4 is constant, the accuracy that just can ensure measurement result when equipment carries out initialization demarcation.And in each assembly above, the only less stable of light source 4, therefore realizes controlling just to ensure the stable and correct of measurement result to the stability of light source 4.
For this reason, the monitoring light path in the present embodiment comprises second orifice 3, second narrow band pass filter 2, second sensor 1 and light source control module 5.Light source control module 5 is connected with the second sensor 1.Wherein second orifice 3, second narrow band pass filter 2 and the second sensor 1 order are arranged, the light of what light source 4 sent comprise mercury characteristic spectral line arrives the second sensor 1, second sensor 1 through second orifice 3, second narrow band pass filter 2 and the light signal of detection is converted to the second electric signal and is sent to light source control module 5.The size that light source control module 5 compares the second electric signal and standard signal judges and adjusts the luminous intensity of light source 4: when the intensity of the second electric signal is greater than standard signal intensity, judges that the luminous intensity of light source 4 is comparatively large, need reduce luminous intensity; When the intensity of the second electric signal is less than standard signal intensity, judges that the luminous intensity of this light source 4 is less, need luminous intensity be improved; So achieve the stable of the intensity of light source 4 by negative feedback control, and then provide the light source of permanent character for optical path.
Relative to existing atom mercury vapor analyzer, the technical scheme in the present embodiment can control the stability of light source, and then ensures the accurate of test result.Certainly, light stability refers to that it should remain on the zone of reasonableness meeting operating characteristic.
It should be noted that the first aperture 6 in the present embodiment and the first collimating mirror 7 coordinate and ensure that the light sent of light source 4 can be exchanged into straight line light and realizes through optical measurement pond 8 measuring again.In other embodiments, the higher depth of parallelism can be realized as adopted LASER Light Source etc. or the first aperture 6 enough little relative to the size of pointolite 4, the first collimating mirror 7 also can not be set.
In the present embodiment, relative to optical path, in monitoring light path, collimating mirror is not set.As long as because considering that monitoring light path structure is determined, just can ensure that the light that light source 4 sends certainty ratio really arrives the second sensor 1 by second orifice 3, second narrow band pass filter 2.Certainly, in other embodiments also the second collimating mirror can be set, monitoring light beam be converted to collimated light beam and carry out filtration again and reach the second sensor 1.
In the present embodiment, light source 4 is low pressure mercury lamp; The dominant emission wavelength of low pressure mercury lamp is 253.7nm, meets the absorption maximum characteristic spectral line of mercury vapour, is more suitable for the light source as mercury vapor analyzer relative to the light source 4 of other types.In order to get rid of the impact of light on measurement result of other wavelength, measurement result is made at utmost to embody the absorption characteristic of mercury vapour to 253.7nm ultraviolet light, the first narrow band pass filter 9 in the present embodiment and the second narrow band pass filter 2 all have employed the narrow band pass filter that centre wavelength is 253.7nm, farthest filter other wavelength light.Simultaneously, in the present embodiment, first sensor 10 and the second sensor 1 all have employed the sensor of deep ultraviolet wave band, it has good absorption characteristic and poor to the response characteristic of its all band to about 253.7nm ultraviolet light, can further improve the sensitivity of test, ensures the accuracy of test.Certainly, in other embodiments, also can adopt narrow band filter slice and the sensor of other types, but corresponding test accuracy may be influenced.
The logical light window quartz that two ends, optical measurement pond 8 in the present embodiment are quartzy material has uv transmittance high characteristic, corrosion resistance characteristic, widespread use experimental apparatus and field of optical measuring technologies.Certainly, the optical measurement pond 8 of other uv transmittance high pass light windows can also be adopted in other embodiments.Experimentally demand, can arrange an optical measurement pond 8 in the present embodiment, also can arrange multiple optical measurement pond 8, needs in this way to ensure that its logical light window fits tightly, prevents the refraction of optical beam during multiple measuring cell; In like manner, also can the optical measurement pond 8 of multiple different size for subsequent use and volume, experimentally require the measuring cell changing different size.
Because needing in reality use connects the neat gasifying device of mercury pyrolysis or other mercury atom gas generators, the real-time demand measured of adaptation, optical measurement pond 8 in the present embodiment also has air intake opening and gas outlet, also be provided with mercury vapour absorption or solidification equipment at gas outlet end, again tail gas drained in air after the mercury vapour absorption that gas outlet is got rid of.
Atom mercury vapor analyzer in above the utility model embodiment is described in detail.Apply specific case herein to set forth principle of the present utility model and embodiment; the explanation of above embodiment just understands core concept of the present utility model for helping; when not departing from the utility model principle; also can carry out some improvement and modification to the utility model, these improve and modify and also fall in protection domain of the present utility model.
Claims (10)
1. a twin-beam Atomic absorption mercury vapor analyzer, the light comprising mercury characteristic spectral line that light source (4) is launched transfers to first sensor (10) through the first aperture (6), optical measurement pond (8) and the first narrow band pass filter (9), the light signal of detection is converted to the first electric signal and is sent to computing module by described first sensor (10), and described computing module calculates mercury vapour concentration according to described first electric signal and the demarcation signal for demarcating standard mercury vapour concentration; It is characterized in that: the light comprising mercury characteristic spectral line that described light source (4) is launched arrives the second sensor (1) through second orifice (3) and the second narrow band pass filter (2); Comprise the light source control module (5) be connected with described light source (4) in addition; The light signal of detection is converted to the second electric signal and is sent to described light source control module (5) by described second sensor (1); More described second electric signal of described light source control module (5) and for the standard signal of Calibrating source luminous intensity size and adjust the luminous intensity of described light source (4).
2. twin-beam Atomic absorption mercury vapor analyzer according to claim 1, is characterized in that: also have the first collimating mirror (7) between described first aperture (6) and described optical measurement pond (8).
3. twin-beam Atomic absorption mercury vapor analyzer according to claim 2, is characterized in that: also have the second collimating mirror between described second orifice (3) and described second narrow band pass filter (2).
4. the twin-beam Atomic absorption mercury vapor analyzer according to any one of claim 1-3, is characterized in that: described demarcation signal is obtained by described twin-beam Atomic absorption mercury vapor analyzer measurement standard sample.
5. twin-beam Atomic absorption mercury vapor analyzer according to claim 4, is characterized in that: described light source (4) is low pressure mercury lamp.
6. twin-beam Atomic absorption mercury vapor analyzer according to claim 5, is characterized in that: described first narrow band pass filter (9) and described second narrow band pass filter (2) are the narrow band pass filter that centre wavelength is 253.7nm.
7. twin-beam Atomic absorption mercury vapor analyzer according to claim 6, is characterized in that: described first sensor (10) and described second sensor (1) are deep ultraviolet band sensor.
8. the twin-beam Atomic absorption mercury vapor analyzer according to any one of claim 1-3, is characterized in that: the two ends of described optical measurement pond (8) are the logical light window of quartzy material.
9. twin-beam Atomic absorption mercury vapor analyzer according to claim 8, is characterized in that: can have multiple described optical measurement pond (8), the serial of multiple described optical measurement pond (8) is put.
10. twin-beam Atomic absorption mercury vapor analyzer according to claim 9, is characterized in that: described optical measurement pond (8) has air intake opening and gas outlet, and described gas outlet is provided with mercury vapour adsorbent equipment or mercury vapour solidification equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520276132.7U CN204649610U (en) | 2015-04-30 | 2015-04-30 | A kind of twin-beam Atomic absorption mercury vapor analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520276132.7U CN204649610U (en) | 2015-04-30 | 2015-04-30 | A kind of twin-beam Atomic absorption mercury vapor analyzer |
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| CN204649610U true CN204649610U (en) | 2015-09-16 |
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| CN201520276132.7U Expired - Fee Related CN204649610U (en) | 2015-04-30 | 2015-04-30 | A kind of twin-beam Atomic absorption mercury vapor analyzer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375562A (en) * | 2018-03-14 | 2018-08-07 | 北京普立泰科仪器有限公司 | A kind of mercury detector of high measurement accuracy |
| WO2021082117A1 (en) | 2019-10-29 | 2021-05-06 | 长沙开元弘盛科技有限公司 | Device and method for simultaneously measuring mercury, cadmium, zinc and lead |
| CN114235685A (en) * | 2021-11-03 | 2022-03-25 | 广州先进技术研究所 | Shake flask cultured biomass on-line measuring device |
-
2015
- 2015-04-30 CN CN201520276132.7U patent/CN204649610U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375562A (en) * | 2018-03-14 | 2018-08-07 | 北京普立泰科仪器有限公司 | A kind of mercury detector of high measurement accuracy |
| WO2021082117A1 (en) | 2019-10-29 | 2021-05-06 | 长沙开元弘盛科技有限公司 | Device and method for simultaneously measuring mercury, cadmium, zinc and lead |
| CN114235685A (en) * | 2021-11-03 | 2022-03-25 | 广州先进技术研究所 | Shake flask cultured biomass on-line measuring device |
| CN114235685B (en) * | 2021-11-03 | 2023-08-08 | 广州先进技术研究所 | On-line biomass detection device for shake flask culture |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190606 Address after: No. 1259 Liangtang East Road, Xingsha Industrial Base, Changsha Economic and Technological Development Zone, Hunan Province Patentee after: Changsha Kaiyuan Hongsheng Technology Co., Ltd. Address before: 410100 No. 172 Kaiyuan Road, Changsha economic and Technological Development Zone, Hunan Patentee before: Changsha Kaiyuan Instruments Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20200430 |
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| CF01 | Termination of patent right due to non-payment of annual fee |