CN205038147U - A flow -through cell and adjustable optical distance circulation formula beam split detecting system for divide optical detection - Google Patents
A flow -through cell and adjustable optical distance circulation formula beam split detecting system for divide optical detection Download PDFInfo
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- CN205038147U CN205038147U CN201520814840.1U CN201520814840U CN205038147U CN 205038147 U CN205038147 U CN 205038147U CN 201520814840 U CN201520814840 U CN 201520814840U CN 205038147 U CN205038147 U CN 205038147U
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- 238000004458 analytical method Methods 0.000 abstract description 9
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- -1 chloro ion Chemical class 0.000 description 7
- 238000002798 spectrophotometry method Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
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- 238000004401 flow injection analysis Methods 0.000 description 4
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- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
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- 229920002530 polyetherether ketone Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
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- LJBWEZVYRBKOCI-UHFFFAOYSA-N 2,4,6-triaminoquinazoline Chemical compound N1=C(N)N=C(N)C2=CC(N)=CC=C21 LJBWEZVYRBKOCI-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a flow -through cell and adjustable optical distance circulation formula beam split detecting system for divide optical detection. The optical distance of flow -through cell is 10 -100mm, and the through -hole aperture is 1.0 -2.0mm, the long -pending 300 mu L that are less than of cell body. The utility model discloses still provide and contained the adjustable optical distance circulation formula beam split detecting system that the aforesaid is used for the flow -through cell of branch optical detection. The utility model discloses a flow -through cell and adjustable optical distance circulation formula beam split detecting system for divide optical detection has high accuracy, high stability and high SNR, high sensitivity is applicable to more weak light intensity signal's analysis and detection, little volume, easily integrated and useful technological effect such as change on line.
Description
Technical field
The utility model relates to a kind of flow cell for light splitting detection and adjustable light path flow type spectral detection system, belongs to technical field of analysis and detection, specifically belongs to a point technical field of light detection.
Background technology
In order to prevent thermal power generation unit therrmodynamic system generation corrosion and scaling and salification, the water and steam quality of unit thermodynamic system is strictly controlled, especially for the jumbo genset of high parameter, it is more and more stricter to the requirement of water and steam quality, all has higher requirement to the index specific aim of water and steam quality supervision, monitoring promptness, sampling representativeness and data validity.Chlorion endangers maximum negative ion as in unit water-steam system, is the important monitor control index of electric power's chemical vapor quality supervision always.Realize to trace chloro ion in Power Plant Water Vapor real-time, quick, accurately detect, significant for guarantee unit safety stable operation.Other industry as medicine, electronics etc. to process water in trace chloro ion content have the industry of control overflow, it is also necessary for realizing the accurate detection of underwater trace chloride ion content.
Flowing injecting analysis technology (FIA) and Pro-concentration with ion exchange process method combine by the author, and integrated flow type divides optical detection technique, develop trace chloro ion analytical approach and system in a kind of automatic, quick, accurate, reliable Power Plant Water Vapor, the lower limit that detects of this method reaches 1.0 μ g/L, analysis speed 2-4 sample/hour, linear regression coeffficient reaches 0.9998.Compared with the chromatography of ions, when in water sample, trace chloro ion concentration is greater than 10 μ g/L, relative error is less than 10%; When in water sample, trace chloro ion concentration is less than 10 μ g/L, relative error is less than 20%, has that reagent consumption is few, thickening efficiency is high, analysis speed is fast, high repeatability and other advantages, is easy to realize in linearize.
In this analytical approach, spectrophotometric detector is a critical component.Spectrophotometric detector principle of work defers to Lambert-Beer's law, and namely A=kCL, k are constant, and C is measured object concentration.In flow injection spectrophotometric analysis system, L is the light path of flow cell.In order to obtain stronger detection signal, the light path (L) of spectrophotometric detector flow cell can be lengthened.At present, the light path of commercially available spectrophotometric detector is 10mm, does not still meet the spectrophotometric detector that different length light path detects needs.In order to improve sensitivity and the accuracy of FIA-WITH ON-LINE ION-EXCHANGE preenrichment-Spectrophotometric Determination of Trace chlorion, suitably increasing spectrophotometric detector flow cell light path is one of approach improving detection signal sensitivity.
In flow injection spectrophotometric method, spectrophotometric detector can adopt liquid phase UV, visible light spectrophotometric detector.UV, visible light spectrophotometric detector commercially available at present flow cell light path used is fixing nonadjustable, and light path is 10mm, and aperture is not more than 1.5mm, and pond volume is less than 20 μ L, and baseline noise is less than 1.0 × 10 under certain condition
-4.Laboratory spectrophotometers is transformed by relevant scientific research institutions, adopts flow type colorimetric pool to replace conventional colorimetric ware, builds flow injection-spectrophotomelric assay system.
(Li Yongsheng, Dong Yiling, the Lv Shuqing such as Li Yongsheng, the experimental study of trace chlorine in Flow Injection Spectrophotometric Determination power plant stove water, North China power technology, 2003,2,18-22) based on mercuric thiocyanate spectrophotometric method, establish Flow Injection Spectrophotometry automatic analysis system, measure the trace chlorine in Power Plant Water Vapor.This method detecting device used is 721 spectrophotometers, and homemade flow cell optical length is 20mm, aperture is 2.0mm.The lower limit that detects of the method is 20 μ g/L, and RSD is less than 0.89%, and the recovery is 100%-105%, and analysis speed is 60-120 sample/h.
Utility model content
In order to solve the problems of the technologies described above, the purpose of this utility model is to provide a kind of flow cell detected for light splitting.
The purpose of this utility model is also to provide a kind of adjustable light path flow type spectral detection system comprising the above-mentioned flow cell for light splitting detection.
For achieving the above object, the utility model provides a kind of flow cell detected for light splitting, and the light path of described flow cell is 10-100mm, and through-hole aperture is 1.0-2.0mm, and pond volume is less than 300 μ L.
According to flow cell described in the utility model, preferably, the pond volume of described flow cell is 10-300 μ L.
According to flow cell described in the utility model, particularly, the material of described flow cell is 316L stainless steel or PEEK, and its light path both sides are made up of optical glass.
The utility model additionally provides a kind of adjustable light path flow type spectral detection system comprising the above-mentioned flow cell for light splitting detection, and described system comprises light source, flow cell, spectrometer and workstation;
The optical-path interface of flow cell passes through Fiber connection with spectrometer and light source respectively, and form light-path, the sample inlet of flow cell is connected with sample bottle by pipeline, and the sample export of flow cell is connected with discharging of waste liquid end by pipeline;
Described spectrometer is electrically connected with workstation.
According to system described in the utility model, particularly, described light source and spectrometer are the equipment of this area routine, and the utility model does not improve its structure etc., those skilled in the art can, according to site work needs, select suitable light source and spectrometer to carry out light splitting detection.
According to system described in the utility model, particularly, the structure of the utility model to described flow cell is not improved, and those skilled in the art according to site work needs, can have the flow cell of ad hoc structure according to the structure choice of prior art flow cell.The structural representation of the flow cell for light splitting detection that the utility model provides as shown in Figure 2.
According to system described in the utility model, particularly, described workstation is this area conventional equipment, may be used for processing and displaying the testing result of detecting device, even can carry out the input of data to control equipment such as detecting devices by alternating interface between man and computer.
The flow cell for light splitting detection that the utility model provides has following characteristics:
(1) the pond volume of flow cell is little as far as possible, and less pond volume can reduce current-carrying capacity, amount of reagent, sample size, improves analysis speed.The pond volume of the flow cell that the utility model provides is less than 300 μ L, is preferably 10-300 μ L.But when raising detection sensitivity is the technical matters for mainly solving, the liquid that rushes that exceptionally can increase flow cell amasss to ensure that flow cell has sufficiently long light path, sample introduction frequency certainly may be caused like this to reduce and the increase of detected peaks broad effect.
(2) under the prerequisite keeping enough luminous flux, minimizing clear aperature of should trying one's best, longer optical path, reduces dispersion, increases optical absorption intensity, to improve detection sensitivity.
(3) dead angle should be avoided in the region of flow cell liquid communication, in order to avoid sample remaining influence reappearance, or voids interference measurement.
(4) light-path inwall is smooth as far as possible, to reduce detection noise.
The Advantageous Effects that flow cell for light splitting detection of the present utility model and adjustable light path flow type spectral detection system have is as follows:
1, high precision, high stability and high s/n ratio;
2, high sensitivity, the analysis being applicable to more weak light intensity signal detects;
3, small size, be easy to integrated and in linearize.
Accompanying drawing explanation
The schematic diagram of the adjustable light path flow type spectral detection system that Fig. 1 provides for the utility model;
The structural representation of the flow cell for light splitting detection that Fig. 2 provides for the utility model.
Main Reference label declaration:
A1, A2 optical-path interface B1, B2 optical window C1, C2 sample inlet, sample export D pond body E light-path.
Embodiment
In order to there be understanding clearly to technical characteristic of the present utility model, object and beneficial effect, referring now to Figure of description, following detailed description is carried out to the technical solution of the utility model, but can not be interpreted as to of the present utility model can the restriction of practical range.
Embodiment 1
Present embodiments provide a kind of flow cell detected for light splitting, wherein, the light path of described flow cell is 17mm, and through-hole aperture is 1.2mm, and pond volume is 20 μ L; The material of this flow cell is 316L stainless steel, and its light path both sides are made up of optical glass.
Embodiment 2
Present embodiments provide a kind of flow cell detected for light splitting, wherein, the light path of described flow cell is 50mm, and through-hole aperture is 1.56mm, and pond volume is 95 μ L; The material of this flow cell is PEEK, and its light path both sides are made up of optical glass.
Embodiment 3
Present embodiments provide a kind of flow cell detected for light splitting, wherein, the light path of described flow cell is 100mm, and through-hole aperture is 1.56mm, and pond volume is 190 μ L; The material of this flow cell is PEEK, and its light path both sides are made up of optical glass.
Embodiment 4
Present embodiments provide a kind of adjustable light path flow type spectral detection system, described system comprise light source, flow cell, spectrometer and workstation that embodiment 1 provides detects for light splitting;
As shown in Figure 2, this flow cell has pond body D to the structural representation of described flow cell, two optical-path interfaces A1, A2, two optical windows B1, B2, a sample inlet C1 and sample export C2; Optical-path interface A1, A2 of flow cell pass through Fiber connection with spectrometer and light source respectively, and form light-path E, the sample inlet C1 of flow cell is connected with sample bottle by pipeline, and the sample export C2 of flow cell is connected with discharging of waste liquid end by pipeline;
Described spectrometer is electrically connected with workstation.
Embodiment 5
Present embodiments provide a kind of adjustable light path flow type spectral detection system, described system comprise light source, flow cell, spectrometer and workstation that embodiment 2 provides detects for light splitting;
As shown in Figure 2, this flow cell has pond body D to the structural representation of described flow cell, two optical-path interfaces A1, A2, two optical windows B1, B2, a sample inlet C1 and sample export C2; Optical-path interface A1, A2 of flow cell pass through Fiber connection with spectrometer and light source respectively, and form light-path E, the sample inlet C1 of flow cell is connected with sample bottle by pipeline, and the sample export C2 of flow cell is connected with discharging of waste liquid end by pipeline;
Described spectrometer is electrically connected with workstation.
Embodiment 6
Present embodiments provide a kind of adjustable light path flow type spectral detection system, described system comprise light source, flow cell, spectrometer and workstation that embodiment 3 provides detects for light splitting;
As shown in Figure 2, this flow cell has pond body D to the structural representation of described flow cell, two optical-path interfaces A1, A2, two optical windows B1, B2, a sample inlet C1 and sample export C2; Optical-path interface A1, A2 of flow cell pass through Fiber connection with spectrometer and light source respectively, and form light-path E, the sample inlet C1 of flow cell is connected with sample bottle by pipeline, and the sample export C2 of flow cell is connected with discharging of waste liquid end by pipeline;
Described spectrometer is electrically connected with workstation.
The adjustable light path flow type spectral detection system schematic diagram that embodiment 4, embodiment 5 and embodiment 6 provide as shown in Figure 1.
Application examples 1
Employing FIA-WITH ON-LINE ION-EXCHANGE enrichment-spectrophotometric method and system (CN203858201U) measure the trace chloro ion in Power Plant Water Vapor, respectively the adjustable light path flow type spectral detection system that liquid phase UV, visible light spectrophotometric detector (Shimadzu SPD20AV) and the utility model embodiment 3, embodiment 4 provide is connected in system stream, to its baseline noise, stability, sensitivity, linear, detect the performance index such as lower limit and carried out contrast test.The mark liquid chlorine ion concentration measured is followed successively by 1.0 μ g/L, 5.0 μ g/L, 10 μ g/L, 30 μ g/L, 50 μ g/L.Measurement result is shown in Table 1.
Table 1
Data as can be seen from table 1, four kinds of detection systems are all relatively more remarkable to the detection peak height of the trace chloro ion standard solution in 1.0-50 μ g/L concentration range, the especially detected peaks of 1.0 μ g/L and 5.0 these two kinds of concentration of μ g/L.It can also be seen that from table 1, it is higher than SPD20AV detecting device that long light path (17mm, 50mm and 100mm) the flow type spectral detection system adopting the utility model to build carries out testing the detecting signal obtained, and light path is longer, and sensitivity is higher.
Baseline noise aspect, the baseline noise of long light path (17mm, 50mm and 100mm) the flow type spectral detection system that the utility model builds is ± 0.0005AU, compared with liquid phase UV-detector, baseline noise is bigger than normal, but for the detection peak height of 1.0 μ g/L, signal to noise ratio (S/N ratio) is greater than 3, also meets the requirement of method sensitivity.
Claims (3)
1., for the flow cell that light splitting detects, it is characterized in that, the light path of described flow cell is 10-100mm, and through-hole aperture is 1.0-2.0mm, and pond volume is less than 300 μ L.
2. flow cell according to claim 1, is characterized in that, the pond volume of described flow cell is 10-300 μ L.
3. comprise the adjustable light path flow type spectral detection system for the flow cell of light splitting detection described in claim 1 or 2, it is characterized in that, described system comprises light source, flow cell, spectrometer and workstation;
The optical-path interface of described flow cell passes through Fiber connection with spectrometer and light source respectively, and form light-path, the sample inlet of flow cell is connected with sample bottle by pipeline, and the sample export of flow cell is connected with discharging of waste liquid end by pipeline;
Described spectrometer is electrically connected with workstation.
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| CN201520814840.1U CN205038147U (en) | 2015-10-20 | 2015-10-20 | A flow -through cell and adjustable optical distance circulation formula beam split detecting system for divide optical detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618096A (en) * | 2018-10-30 | 2019-12-27 | 北京大学 | On-line measuring device and method for iron concentration in atmosphere based on flow injection analysis |
| CN111323380A (en) * | 2018-12-17 | 2020-06-23 | 中国科学院深圳先进技术研究院 | Spectrophotometer detection system and detection method thereof |
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2015
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618096A (en) * | 2018-10-30 | 2019-12-27 | 北京大学 | On-line measuring device and method for iron concentration in atmosphere based on flow injection analysis |
| CN111323380A (en) * | 2018-12-17 | 2020-06-23 | 中国科学院深圳先进技术研究院 | Spectrophotometer detection system and detection method thereof |
| WO2020125554A1 (en) * | 2018-12-17 | 2020-06-25 | 中国科学院深圳先进技术研究院 | Spectrophotometer inspection system and method |
| CN111323380B (en) * | 2018-12-17 | 2021-12-24 | 中国科学院深圳先进技术研究院 | Spectrophotometer detection system and detection method thereof |
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