CN109342345A - A kind of determination of total nitrogen content instrument - Google Patents
A kind of determination of total nitrogen content instrument Download PDFInfo
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- CN109342345A CN109342345A CN201811521457.1A CN201811521457A CN109342345A CN 109342345 A CN109342345 A CN 109342345A CN 201811521457 A CN201811521457 A CN 201811521457A CN 109342345 A CN109342345 A CN 109342345A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 3
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 229910052805 deuterium Inorganic materials 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- 229910052724 xenon Inorganic materials 0.000 claims description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims 2
- 238000001914 filtration Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 14
- 238000002835 absorbance Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 239000012496 blank sample Substances 0.000 description 4
- 239000012086 standard solution Substances 0.000 description 4
- 238000002798 spectrophotometry method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 102000012286 Chitinases Human genes 0.000 description 2
- 108010022172 Chitinases Proteins 0.000 description 2
- 239000012490 blank solution Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 125000001477 organic nitrogen group Chemical group 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 nitrogenous compound Chemical class 0.000 description 1
- 230000005789 organism growth Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of determination of total nitrogen content instrument, including light source assembly, filter set, colorimetric pool and photoelectric processing portion, the light source assembly includes illuminator, and the light of the illuminator transmitting obtains a branch of directional light after light source assembly is handled, the light source as test analysis；It include several spike interference filters in the filter set, specific spike interference filter is directed at a branch of directional light by being subjected to displacement the filter set, after a branch of directional light is by spike interference filter specific in filter set, the ultraviolet light of specific wavelength is obtained.Beneficial effects of the present invention: light path system performance is stablized, and is not interfered by external causes such as use condition and environment；While the characteristics of structure of the invention designs can guarantee optical accuracy performance, improve wavelength and relevant parameter stability, production technology difficulty and cost are reduced, is suitble to scale of mass production and popularization.
Description
Technical field
The present invention relates to a kind of water quality analyzer, the special measuring instrument of especially a kind of Determination TN in water.
Background technique
Total nitrogen is referred to as TN, and the total nitrogen content in water body is one of the important indicator for measuring water quality.Total nitrogen in water body contains
Amount refers to the inorganic total amount with organic nitrogen of various forms, inorganic nitrogens and the protein, ammonia such as including NO3-, NO2- and NH4+ in water body
The organic nitrogens such as base acid and organic amine are calculated with the nitrogenous milligram number of every liter of water.Often it is used to represent what water body was polluted by nutriment
Degree.Its measurement facilitates evaluation water body and is contaminated and self-cleaning situation.When the substances such as nitrogen, phosphorus are exceeded in surface water, microorganism is big
Amount breeding, planktonic organism growth is vigorous, eutrophic state occurs.
Total nitrogen index is measured in China at present, used measuring method is alkaline chitinase oxidizing process.In HJ636-
It is required in 2012 " the measurement alkaline chitinase of water quality total nitrogen clears up ultraviolet spectrophotometry ", at 120~124 DEG C, alkalinity
Potassium persulfate solution makes the nitrogen of nitrogenous compound in sample be converted into nitrate, using ultraviolet spectrophotometry in wavelength 220nm
At 275nm, sample absorbance A is measured respectively220And A275, by absorbance value measured under two wavelength, according to formula meter
Correction absorbance is calculated, the concentration value of total nitrogen is conversed by the drafting of standard curve.In addition there are other means, such as azo
Identical effect also can be obtained in the measuring methods such as colorimetric method, the chromatography of ions, gas molecule in space absorption process.
Reliability and convenience for measuring method consider that mainstream test method all selects ultraviolet spectrophotometry at present
It is measured.So the measurement of the index depends on ultraviolet spectrometry ultraviolet photometer.There are some problems and inconvenience for this method: 1.
Total nitrogen is not directly available after sample test and is calculated as a result, it is desirable to be inserted in formula, so that continuous mode is cumbersome；2. surveying every time
To guarantee that the accuracy of result must carry out calibration curve with standard solution before fixed, standard curve is manually drawn；3. due to principle
Limit, each sample measure when require respectively between 220nm and 275nm frequent switching wavelength make it is cumbersome；4. measuring
The wavelength of used ultraviolet photometer repeats, the influence of transmittance noise and drift index to result is very big；5. ultraviolet photometer
Use condition and environmental requirement are all compared higher.Vibration in transport storage, which is fallen, touches；The temperature and humidity of environment, electromagnetism are dry when use
It disturbs, vibrating noise, etchant gas etc.；These all can be to mechanical structure, precision positioning and the spectroscopy components inside ultraviolet photometer
Etc. impacting.So improper use and use condition can directly have an impact measurement result.
Summary of the invention
For above-mentioned technical problem in the related technology, the present invention proposes a kind of determination of total nitrogen content instrument, existing at present to overcome
Technology above shortcomings.
To realize the above-mentioned technical purpose, the technical scheme of the present invention is realized as follows:
A kind of determination of total nitrogen content instrument characterized by comprising
Light source assembly issues a branch of directional light；
Filter set, it is vertical with a branch of directional light, include several spike interference filters in the filter set, leads to
Crossing, which is subjected to displacement the filter set, is directed at a branch of directional light for specific spike interference filter, described a branch of parallel
After light is by spike interference filter specific in filter set, the ultraviolet light of specific wavelength is obtained；
Colorimetric pool is placed in the filter set rear or is placed between the light source assembly and the filter set；With
Photoelectric processing portion is placed in the rear of filter set and colorimetric pool, and photoelectric processing portion is received filters by filter set
And colorimetric pool absorbs the ultraviolet light of the specific wavelength obtained and is handled, and is then sent to master control system.
Further, semi-transparent semi-reflecting lens are provided with after the colorimetric pool, a branch of directional light that the light source assembly issues is worn
It is handled after crossing the colorimetric pool through the semi-transparent semi-reflecting lens, forms two-beam, and be respectively perpendicular mutually independent narrow by two
It is received after band interferometric filter by corresponding two groups of photoelectric processing portions.
Further, the light source assembly includes illuminator, illuminator using containing ultraviolet continuous spectrum deuterium lamp, xenon lamp,
Complex element lamp.
Further, the light source assembly further includes biconvex lens, and illuminator is placed on the biconvex lens focal plane, with
The light that illuminator emits is collimated, directional light is become.
Further, the light source assembly selects the biconvex lens of corresponding curvature, illuminator is focused on slit, simultaneously
Again with the biconvex lens of dimension as collimating mirror, slit be on collimating mirror focal plane, the light that illuminator is emitted into
Row collimation, becomes directional light.
Further, the light source assembly is put down using illuminator to be placed on plano-concave mirror curvature radius by adjusting
Recessed reflecting mirror rotates angle, makes light by slit, and slit is located in plano-concave reflector focal point, while again with pair of dimension
Convex lens is on collimating mirror focal plane as collimating mirror, slit, and the light that illuminator emits is collimated, becomes parallel
Light.
Further, the central wavelength error of the spike interference filter is less than 1nm, and spectral half-width is less than 2nm.
Further, the filter set is rotational structure, several described spike interference filters are circumferentially distributed in
In the filter set, the circular filter group realizes switching spike interference filter by rotation.
Further, the filter set is slide construction, several described spike interference filters are along glide direction point
For cloth in the box filter group, the box filter group realizes switching spike interference filter by sliding.
Beneficial effects of the present invention: light path system performance is stablized, and is not interfered by external causes such as use condition and environment；The present invention
While the characteristics of structure designs can guarantee optical accuracy performance, improve wavelength and relevant parameter stability, production skill is reduced
Art difficulty and cost compare ultraviolet ultraviolet photometer, can quickly carry out the fast and flexible switching of multi-wavelength, wavelength repeatability
Good, weak compared to ultraviolet photometer light energy defect, the device also have light energy strong and stablize, and are suitble to scale of mass production
The advantages of with promoting.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of determination of total nitrogen content instrument light path system example one described according to embodiments of the present invention；
Fig. 2 is a kind of determination of total nitrogen content instrument light path system example two described according to embodiments of the present invention；
Fig. 3 is a kind of determination of total nitrogen content instrument light path system example three described according to embodiments of the present invention；
Fig. 4 is a kind of determination of total nitrogen content instrument light source assembly example one described according to embodiments of the present invention；
Fig. 5 is a kind of determination of total nitrogen content instrument light source assembly example two described according to embodiments of the present invention；
Fig. 6 is a kind of determination of total nitrogen content instrument light source assembly example three described according to embodiments of the present invention；
Fig. 7 is a kind of determination of total nitrogen content instrument filter set example one described according to embodiments of the present invention；
Fig. 8 is a kind of determination of total nitrogen content instrument filter set example two described according to embodiments of the present invention；
Fig. 9 is a kind of determination of total nitrogen content instrument filter set example three described according to embodiments of the present invention；
Figure 10 is that a kind of determination of total nitrogen content instrument described according to embodiments of the present invention is carried out in the series standard solution to various concentration
The result and relative deviation of test；
Figure 11 is that a kind of determination of total nitrogen content instrument described according to embodiments of the present invention is carried out in the series standard solution to various concentration
The linear equation correlation of the series standard solution of test；
Figure 12 is that a kind of determination of total nitrogen content instrument described according to embodiments of the present invention carries out seven repetitions to two random concentration samples
Property measurement, standard deviation and relative standard deviation result as a result；
In figure: 1, light source assembly；2, filter set；3, colorimetric pool；4, photoelectric processing portion；5, illuminator；6, slit；7, it collimates
Mirror；8, plano-concave reflecting mirror；9, semi-transparent semi-reflecting lens；10, spike interference filter.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range.
As Figure 1-Figure 2, a kind of determination of total nitrogen content instrument according to embodiments of the present invention, comprising: light source assembly 1,
Issue a branch of directional light；Filter set 2, it is vertical with a branch of directional light, it include several narrowbands in the filter set
Interferometric filter 10, by rotating or sliding the filter set 2, to be directed at specific spike interference filter 10 described a branch of
Directional light；Colorimetric pool 3 is placed in 2 rear of filter set or is placed between the light source assembly 1 and the filter set 2；
With photoelectric processing portion 4, it is placed in the rear of filter set and colorimetric pool, photoelectric processing portion 4 is received filters by filter set
And colorimetric pool absorb after the ultraviolet light of specific wavelength that obtains and handled, be then sent to master control system.
As shown in figure 3, being provided with semi-transparent semi-reflecting lens 9, the light source after the colorimetric pool 3 in an embodiment of the present invention
A branch of directional light that component 1 issues is handled after passing through the colorimetric pool 3 through the semi-transparent semi-reflecting lens 9, forms two-beam, and respectively
It is received perpendicular through after two mutually independent spike interference filters 10 by corresponding two groups of photoelectric processing portions 4.
In an embodiment of the present invention, spike interference filter wavelength error is less than 1nm, and spectral half-width is less than 2nm.
In an embodiment of the present invention, illuminator 5 uses deuterium lamp, xenon lamp, complex element lamp containing ultraviolet continuous spectrum.
In an embodiment of the present invention, according to the light launch angle for selecting illuminator 5, the lenticular of dimension is used
Mirror is placed in illuminator 5 on biconvex lens focal plane as collimating mirror 7, and the light that illuminator 5 emits is collimated, is become
Directional light, then a branch of directional light is obtained by the interference of slit 6 and filter set 2, as the light source assembly 1 of test analysis,
As shown in Figure 4.
In an embodiment of the present invention, the biconvex lens of corresponding curvature is selected, illuminator 5 is focused on slit 6, simultaneously
Use the biconvex lens of dimension as collimating mirror 7 again, slit 6 is on 7 focal plane of collimating mirror, the light that illuminator 5 is emitted
Line is collimated, and becomes directional light, then obtain a branch of directional light by the interference of filter set 2, the light as test analysis
Source component 1, as shown in Figure 5.
In an embodiment of the present invention, illuminator 5 is placed in 8 radius of curvature of plano-concave reflecting mirror, it is anti-by adjusting plano-concave
It penetrates mirror 8 and rotates angle, make light by slit 6, slit 6 is located in 8 focus of plano-concave reflecting mirror, while again with pair of dimension
Convex lens is on 7 focal plane of collimating mirror as collimating mirror 7, slit 6, the light that illuminator 5 emits is collimated, and becomes flat
Row light, then a branch of directional light is obtained by the interference of filter set 2, as the light source assembly of test analysis, as shown in Figure 6.
In an embodiment of the present invention, the filter set 2 is rotational structure, and shape is round or sector, several
The spike interference filter 10 is circumferentially distributed in the circular filter group 2, and the circular filter group 2 passes through rotation
Realize switching spike interference filter 10, as illustrated in figs. 8-9.
In an embodiment of the present invention, the filter set 2 be slide construction, shape be it is rectangular, several are described narrow
Band interferometric filter 10 is distributed in the box filter group 2 along glide direction, and the box filter group 2 is real by sliding
Now switch spike interference filter 10, as shown in Figure 7.
When the specifically used present invention, follow the steps below:
1. accordingly being pre-processed according to national standard method to water sample to be measured, pretreated sample is successively poured into 10mm optical path
Quartz colorimetric utensil in, colorimetric estimation can be carried out on instrument.One blank sample (reference zero concentration samples) and several
Sample to be tested.
2. blank sample is placed in instrument colorimetric pool first, " zero setting " key is pressed on instrument master control system touch keyboard,
Control system will drive filter set to switch under 220nm, then absorbance of the master control system acquisition blank solution at 220nm
A0220；After the completion of acquisition, control system again switches to driving filter set under 275nm, and acquires blank solution in 275nm
Under absorbance A 0275.The absorbance A 0 of blank sample is calculated by formula (1)；Simultaneously using calculated A0 value as current
Absorbance value Ai is brought into formula (3), and current total values of nitrogen might is calculated and displayed；
A0= A0220 -2A0275 (1)
3. then sample to be tested is placed in instrument colorimetric pool, " measurement " key is pressed on instrument master control system touch keyboard, is controlled
System will drive filter set to switch under 220nm again, then absorbance of the master control system acquisition sample to be tested at 220nm
Ai220；After the completion of acquisition, control system again switches to driving filter set under 275nm, and acquires sample to be tested in 275nm
Under absorbance A i275.The absorbance A i of the sample to be tested is calculated by formula (2)；
Ai= Ai220 -2Ai275(2)
4. instrument calculates this by formula (3) according to the absorbance A 0 of blank sample and the absorbance A i of sample to be tested simultaneously
The total nitrogen concentration value of sample to be tested；
NT=K(Ai-A0) (3)
As shown in Figure 10-Figure 12, for the relevant test data for using the total nitrogen concentration value of the invention for measuring sample to be tested.
Light path system performance of the present invention is stablized, and is not interfered by external causes such as use condition and environment；Structure of the invention design
Feature can guarantee optical accuracy performance, improve wavelength and while relevant parameter stability, reduce production technology difficulty and at
This, compares ultraviolet ultraviolet photometer, can quickly carry out the fast and flexible switching of multi-wavelength, wavelength repeatability is good, compared to purple
The weak defect of outer photometer light energy, the device also have light energy strong and stablize, and are suitble to the excellent of scale of mass production and popularization
Point.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of determination of total nitrogen content instrument characterized by comprising
Light source assembly (1) issues a branch of directional light；
Filter set (2), it is vertical with a branch of directional light, it include that several narrow-band interferences are filtered in the filter set (2)
Mating plate (10), it is by being subjected to displacement the filter set (2) that specific spike interference filter (10) alignment is described a branch of
Directional light obtains specific wavelength after a branch of directional light is by spike interference filter (10) specific in filter set
Ultraviolet light；
Colorimetric pool (3) is placed in the filter set (2) rear or is placed in the light source assembly (1) and the filter set (2)
Between；With
Photoelectric processing portion (4) is placed in the rear of filter set (2) and colorimetric pool (3), and photoelectric processing portion (4), which receive, to be passed through
Filter set (2) filtering and colorimetric pool (3) absorb ultraviolet light obtained and are handled, and are then sent to master control system.
2. a kind of determination of total nitrogen content instrument according to claim 1, which is characterized in that be provided with after the colorimetric pool (3) semi-transparent
Semi-reflective mirror (9), a branch of directional light that the light source assembly (1) issues pass through the colorimetric pool (3) by the semi-transparent semi-reflecting lens
(9) handle, formed two-beam, and be respectively perpendicular by after two mutually independent spike interference filters (10) by corresponding two
Group photoelectric processing portion (4) receives.
3. according to claim 1 or a kind of determination of total nitrogen content instrument as claimed in claim 2, which is characterized in that the light source assembly (1)
Including illuminator (5), illuminator (5) uses deuterium lamp, xenon lamp, complex element lamp containing ultraviolet continuous spectrum.
4. a kind of determination of total nitrogen content instrument according to claim 3, which is characterized in that the light source assembly (1) further includes biconvex
Lens, illuminator (5) are placed on the biconvex lens focal plane, and the light that illuminator is emitted collimates, and becomes parallel
Light.
5. a kind of determination of total nitrogen content instrument according to claim 3, which is characterized in that the light source assembly (1) is selected corresponding bent
The biconvex lens of rate focuses on illuminator (5) on slit, while again with the biconvex lens of dimension as collimating mirror (7),
Slit is on collimating mirror (7) focal plane, and the light that illuminator (5) emit is collimated, directional light is become.
6. a kind of determination of total nitrogen content instrument according to claim 3, which is characterized in that the light source assembly (1) uses light source
Lamp (5) is placed in plano-concave reflecting mirror (8) radius of curvature, rotates angle by adjusting plano-concave reflecting mirror (8), light is made to pass through slit
(6), slit (6) is located in plano-concave reflecting mirror (8) focus, while again with the biconvex lens of dimension as collimating mirror (7), narrow
Seam (6) is on collimating mirror (7) focal plane, and the light that illuminator (5) emit is collimated, directional light is become.
7. a kind of determination of total nitrogen content instrument according to claim 1, which is characterized in that in the spike interference filter (10)
Heart wavelength error is less than 1nm, and spectral half-width is less than 2nm.
8. a kind of determination of total nitrogen content instrument according to claim 1, which is characterized in that the filter set (2) is rotational structure,
Several described spike interference filters (10) are circumferentially distributed on the filter set (2), the circular filter group (2)
Switching spike interference filter (10) is realized by rotation.
9. a kind of determination of total nitrogen content instrument according to claim 1, which is characterized in that the filter set (2) is slide construction,
Several described spike interference filters (10) are distributed on the box filter group (2) along glide direction, the rectangular filter
Mating plate group (2) realizes switching spike interference filter (10) by sliding.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551491A (en) * | 2020-04-28 | 2020-08-18 | 南京理工大学 | Ultraviolet light source beam splitting device applied to atomic absorption spectrometry mercury detector |
| CN114152574A (en) * | 2021-12-31 | 2022-03-08 | 天津工业大学 | Portable water quality analyzer for membrane module integrity detection and detection method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02198341A (en) * | 1989-01-28 | 1990-08-06 | Horiba Ltd | Method for measuring total nitrogen using uv method |
| JPH0653971U (en) * | 1992-12-30 | 1994-07-22 | 株式会社堀場製作所 | Simultaneous measurement device for total nitrogen and total phosphorus |
| CN107064026A (en) * | 2009-12-31 | 2017-08-18 | 株式会社岛津制作所 | Total nitrogen total phosphorus determines device |
| CN107677368A (en) * | 2017-09-11 | 2018-02-09 | 上海理工大学 | Linear dispersion is adjustable optical filtering type spectrometer |
| CN207248733U (en) * | 2017-09-04 | 2018-04-17 | 杭州职业技术学院 | A kind of underground water multi-parameter on-line measuring device |
| CN209416909U (en) * | 2018-12-13 | 2019-09-20 | 北京连华永兴科技发展有限公司 | A kind of determination of total nitrogen content instrument |
-
2018
- 2018-12-13 CN CN201811521457.1A patent/CN109342345A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02198341A (en) * | 1989-01-28 | 1990-08-06 | Horiba Ltd | Method for measuring total nitrogen using uv method |
| JPH0653971U (en) * | 1992-12-30 | 1994-07-22 | 株式会社堀場製作所 | Simultaneous measurement device for total nitrogen and total phosphorus |
| CN107064026A (en) * | 2009-12-31 | 2017-08-18 | 株式会社岛津制作所 | Total nitrogen total phosphorus determines device |
| CN207248733U (en) * | 2017-09-04 | 2018-04-17 | 杭州职业技术学院 | A kind of underground water multi-parameter on-line measuring device |
| CN107677368A (en) * | 2017-09-11 | 2018-02-09 | 上海理工大学 | Linear dispersion is adjustable optical filtering type spectrometer |
| CN209416909U (en) * | 2018-12-13 | 2019-09-20 | 北京连华永兴科技发展有限公司 | A kind of determination of total nitrogen content instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551491A (en) * | 2020-04-28 | 2020-08-18 | 南京理工大学 | Ultraviolet light source beam splitting device applied to atomic absorption spectrometry mercury detector |
| CN114152574A (en) * | 2021-12-31 | 2022-03-08 | 天津工业大学 | Portable water quality analyzer for membrane module integrity detection and detection method thereof |
| CN114152574B (en) * | 2021-12-31 | 2023-10-17 | 天津工业大学 | Portable water quality analyzer for detecting integrity of membrane assembly and detection method thereof |
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