CN109342344A - A kind of the non-calibrating device and its measuring method of mercury analyzer - Google Patents
A kind of the non-calibrating device and its measuring method of mercury analyzer Download PDFInfo
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- CN109342344A CN109342344A CN201811452237.8A CN201811452237A CN109342344A CN 109342344 A CN109342344 A CN 109342344A CN 201811452237 A CN201811452237 A CN 201811452237A CN 109342344 A CN109342344 A CN 109342344A
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- light
- gas chamber
- colour filter
- plane mirror
- tubular gas
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005259 measurement Methods 0.000 claims abstract description 29
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 238000007405 data analysis Methods 0.000 claims abstract description 15
- 238000013480 data collection Methods 0.000 claims abstract description 15
- 238000002133 sample digestion Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 75
- 230000003287 optical effect Effects 0.000 claims description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 239000004809 Teflon Substances 0.000 claims description 4
- 229920006362 Teflon® Polymers 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000004993 emission spectroscopy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 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
-
- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6402—Atomic fluorescence; Laser induced fluorescence
- G01N21/6404—Atomic fluorescence
Abstract
The invention discloses the non-calibrating devices and measuring method of a kind of mercury analyzer, include light source, tubular gas chamber, the first plane mirror, the second plane mirror, the first colour filter, the second colour filter, third colour filter, rotating platform, photomultiplier tube and data collection and analysis device.The present invention obtains that mercury concentration is unrelated with the transmission power of light source by measuring the light intensity of cold-vapour atomic absorption method and Pressurized sample digestion using photomultiplier tube timesharing, only related in the ratio of light intensity；The current ratio obtained in combination with photomultiplier tube itself measurement is unrelated with the sensitivity of photomultiplier tube, the only feature related with the ratio of light intensity, the mercury concentration in gas directly can be obtained by the current ratio that photomultiplier tube measures, without re-scaling in measurement to device.The workload for reducing tester in actual use greatly improves detection efficiency, while also saving the use of raw material in calibration process, reduces testing cost.
Description
Technical field
The invention belongs to mercury vapour detection technique fields, more particularly to a kind of non-calibrating device of mercury analyzer and its measurement
Method.
Background technique
Cold-vapour atomic absorption method and Pressurized sample digestion are the methods of currently used measurement gas mercury concentration, but due to light
The performance of electrical part (light source, photodetector etc.) itself can change with the variation of time or external condition,
Therefore in use for some time, photoelectric device is re-scaled in system, and whole equipment is caused to need complete set
Calibration system.The present invention utilizes the inner link of above two measurement method, proposes device and its survey of a kind of non-calibrating
Determine method.
Summary of the invention
The purpose of the present invention is needle problems of the prior art, provide a kind of mercury analyzer non-calibrating device and its
Measuring method.
The present invention is achieved by the following technical solutions:
A kind of non-calibrating device of mercury analyzer, including light source, tubular gas chamber, the first plane mirror, the second plane mirror, first
Colour filter, the second colour filter, third colour filter, rotating platform, photomultiplier tube and data collection and analysis device；The tubular gas
Room is hollow structure, and both ends are respectively light incidence end and beam projecting end, and the top of tubular gas chamber is symmetrically arranged with for gas
The air inlet and air outlet of disengaging, tubular gas chamber lower part are equipped with optical window；The light source is fixedly installed in the light of tubular gas chamber
Line incidence end is equipped with the first colour filter between light source and light incidence end；The beam projecting end of the tubular gas chamber is equipped with first
Plane mirror is equipped with the second colour filter between beam projecting end and the first plane mirror；It is flat that second plane mirror is vertical at first
Below the mirror of face, the reflecting surface of the first plane mirror and the second plane mirror is oppositely arranged；The rotating platform is vertical at optical window
Underface, and along the height level of the second plane mirror be arranged, between optical window and rotating platform be equipped with third colour filter；
Photomultiplier tube is fixedly connected on the rotating platform, when the photomultiplier tube rotates, the light receiver of photomultiplier tube
Can be corresponding with the reflecting surface of optical window and the second plane mirror respectively and receive the measurement light exported from tubular gas chamber in end；Institute
The signal output end for stating photomultiplier tube is connect with data collection and analysis device, and the data collection and analysis device is for exporting by photoelectricity
The light intensity electric current of multiplier tube measurement.
The technical issues of present invention further solves is that the optical window opening direction and tubular gas indoor light transmit
Direction is vertical.
The technical issues of present invention further solves is first colour filter, the second colour filter and third colour filter
What it is to incident beam is 253.7nm through wavelength.
The technical issues of present invention further solves is that the tubular gas chamber is silica glass tube, the glass tube
Inner wall is equipped with Teflon coating.
The technical issues of present invention further solves is that described device can use cold-vapour atomic absorption method or Cold Atomic Fluorescent Mercury
The measurement of method progress gas mercury concentration；Wherein, the optical window is used to export the measurement light of Pressurized sample digestion, the tubular
The beam projecting end of gas chamber is used to export the measurement light of cold-vapour atomic absorption method.
The principle of the cold-vapour atomic absorption method is the selective suction of ultraviolet light for being 253.7nm to wavelength due to mercury vapour
It receives, in certain concentration range, absorbance is directly proportional to mercury concentration, when receiving the radiation of light source containing mercuryvapour, mercury atom
It can show selective absorbing.
The Pressurized sample digestion is a kind of emission spectrometry on the basis of atomic absorption method.The light beam of light source transmitting
By the mercury element as contained by water sample convert mercuryvapour cloud when, mercury atom absorbs the energy of specific resonance wave, swashs it by ground state
It is dealt into upper state, and when the atom being excited returns to ground state, fluorescence will be issued, by the size for measuring fluorescence intensity
The content of mercury in water sample is measured, therefore the detector of fluorescence intensity will be placed on and source emissioning light beam position at right angle
On.
The present invention also protects the measuring method of mercury analyzer non-calibrating device, comprising the following steps:
Under test gas is passed through tubular gas chamber, opens light source, light beam launched by light source is after the first colour filter by step 1
Enter tubular gas chamber from light incidence end, incident beam is divided two-way to export by tubular gas chamber；
Step 2: closing optical window, rotating platform is adjusted, light beam is exported from the beam projecting end of tubular gas chamber, through the
Two colour filters inject the reflecting surface of the first plane mirror, are then incident to light after the reflection of the first plane mirror and the second plane mirror
The light receiver end of electric multiplier tube, the light intensity electric current i of record data collection and analysis device output1；
Step 3: closing the beam projecting end of tubular gas chamber, optical window is opened, adjusts rotating platform, light beam is from optics
Window is incident to the light receiver end of photomultiplier tube, the light intensity electric current of record data collection and analysis device output through third colour filter
i2；
Step 4 obtains the mercury concentration C under test gas according to formulaHg；
Wherein,For fluorescence coefficient, εHgFor the unit length of mercury and the absorption coefficient of unit concentration medium.
Further, the fluorescence coefficientPreparation method are as follows:
Step A: being passed through pure nitrogen gas in tubular gas chamber, opens light source, closes optical window, measures the light intensity that is absorbed
I0；
Step B: it is c that known mercury vapour concentration is passed through in tubular gas chamberHgStandard mercury vapour, light source is opened, respectively by cold
Atomic absorption method and Pressurized sample digestion, which measure, absorbs light intensity I1With fluorescent intensity I2；
Step C: according to formulaFluorescence coefficient can be obtainedValue.
Mercury concentration C of the present inventionHgThe derivation of formula is as follows:
According to Beer law, the formula using cold-vapour atomic absorption method measurement light intensity is as follows:
Wherein, I1For arriving for cold-vapour atomic absorption method measurement；I0For incident intensity；εHgFor the unit length and unit concentration of mercury
The absorption coefficient of medium；cHgFor the concentration of mercury；L is the length of tubular gas chamber measuring cell.
Formula using Pressurized sample digestion measurement light intensity is as follows:
Wherein,For fluorescence coefficient, value is related to the measurement structure of gas chamber, unrelated with the factors such as mercury concentration, works as gas chamber
After structure determination, value is a constant；εHgFor the unit length of mercury and the absorption coefficient of unit concentration medium；cHgFor the dense of mercury
Degree；L is the length of tubular gas chamber measuring cell.
The present invention measures the light intensity of two methods using a photomultiplier tube timesharing, and can be obtained by formula 1, formula 2:
That is:
From formula 4 as can be seen that mercury concentration CHgIt is unrelated with the transmission power of light source, so the variation of light source will not influence measurement
As a result, only in I1And I2Ratio it is related.
When using same photomultiplier tube, due to the performance change of photocathode cause change of sensitivity be it is identical,
Therefore the ratio using the obtained light intensity electric current of measurement is as follows:
Wherein, k value indicates the sensitivity of photomultiplier tube；From formula 5 it can be seen that current ratio and photoelectricity that measurement obtains
The sensitivity of multiplier tube is unrelated, only related with the ratio of light intensity, therefore is not needed in use because of the possible change of sensitivity
Change and is re-scaled.
Mercury concentration C can be obtained in convolution 4 and formula 5HgFormula are as follows:
In addition, fluorescence coefficient can be obtained in convolution 1 and formula 2Formula are as follows:
Therefore, in the first calibration of system, it is only necessary to nitrogen be selected to test original incident light intensity I0, passing through mercury school
Quasi- instrument, which generates known concentration standard mercury vapour and measures it, absorbs light intensity I1With fluorescent intensity I2, by above-mentioned formula, can be obtained glimmering
Backscatter extinction logarithmic ratio
The invention has the benefit that
The non-calibrating device and its measuring method of a kind of mercury analyzer of the present invention, by utilizing a photomultiplier transit
Pipe timesharing measures the light intensity of cold-vapour atomic absorption method and Pressurized sample digestion, and by the inner link of two methods, it is dense to obtain mercury
Spend, only in the ratio of light intensity related, the electricity that in combination with photomultiplier tube itself measurement obtains unrelated with the transmission power of light source
Stream ratio is unrelated with the sensitivity of photomultiplier tube, and only the feature related with the ratio of light intensity, can directly pass through photomultiplier tube
The current ratio measured obtains the mercury concentration in gas, without re-scaling in measurement to device.Actually make
The workload for reducing tester to a certain extent in, greatly improves detection efficiency, while also saving in calibration process
The use of raw material, reduces testing cost.
Detailed description of the invention
Fig. 1 is schematic structural diagram of the device of the invention.
Fig. 2 is the structural schematic diagram of tubular gas chamber of the present invention.
Serial number in figure, 1- light source, 2- tubular gas chamber, the first plane mirror of 3-, the second plane mirror of 4-, the first colour filter of 5-, 6-
Second colour filter, 7- third colour filter, 8- rotating platform, 9- photomultiplier tube, 10- data collection and analysis device, 21- light are incident
End, 22- beam projecting end, 23- air inlet, the gas outlet 24-, 25- optical window, 26- Teflon coating.
Specific embodiment
Summary of the invention of the invention is further described with reference to the accompanying drawings and examples.
Referring to Fig. 1-2, a kind of non-calibrating device of mercury analyzer, including light source 1, tubular gas chamber 2, the first plane mirror 3,
Two plane mirrors 4, the first colour filter 5, the second colour filter 6, third colour filter 7, rotating platform 8, photomultiplier tube 9 and data are adopted
Set analysis device 10；The tubular gas chamber 2 is hollow structure, and both ends are respectively light incidence end 21 and beam projecting end 22, tubular
The top of gas chamber is symmetrically arranged with air inlet 23 and gas outlet 24 for gas disengaging, and tubular gas chamber lower part is equipped with optical window
25；The light source 1 is fixedly installed in the light incidence end 21 of tubular gas chamber, and first is equipped between light source 1 and light incidence end 21
Colour filter 5；The beam projecting end 22 of the tubular gas chamber is equipped with the first plane mirror 3, beam projecting end 22 and the first plane mirror 3 it
Between be equipped with the second colour filter 6；Second plane mirror 4 is vertical at the lower section of the first plane mirror 3, the first plane mirror 3 and second flat
The reflecting surface of face mirror 4 is oppositely arranged；The rotating platform 8 is vertical at the underface of optical window 25, and along the second plane
The height level of mirror 4 is arranged, and third colour filter 7 is equipped between optical window 25 and rotating platform 8；It is solid on the rotating platform 8
Surely be connected with photomultiplier tube 9, when the photomultiplier tube 9 rotates, the light receiver end of photomultiplier tube can respectively with optics
The reflecting surface of window 25 and the second plane mirror 4 is corresponding and receives the measurement light exported from tubular gas chamber；The photomultiplier transit
The signal output end of pipe 8 is connect with data collection and analysis device 10, and the data collection and analysis device 10 is for exporting by photomultiplier transit
The light intensity electric current of pipe measurement.
In the present embodiment, the opening direction of the optical window 25 is vertical with light transmission direction in tubular gas chamber 2.
In the present embodiment, the transmission of first colour filter 5, the second colour filter 6 and third colour filter 7 to incident beam
Wavelength is 253.7nm.
In the present embodiment, the tubular gas chamber 2 is silica glass tube, and the glass inside pipe wall is equipped with Teflon coating
26。
In the present embodiment, described device can carry out gas mercury concentration using cold-vapour atomic absorption method or Pressurized sample digestion
Measurement；Wherein, the optical window 25 is used to export the measurement light of Pressurized sample digestion, the beam projecting end of the tubular gas chamber
22 for exporting the measurement light of cold-vapour atomic absorption method.
The present embodiment is the measuring method based on mercury analyzer non-calibrating device described above, comprising the following steps:
Under test gas is passed through tubular gas chamber 2 by step 1, opens light source 1, the light source 1 uses hollow cathode lamp, by light
The light beam of source transmitting enters tubular gas chamber 2 from light incidence end 21 after the first colour filter 5, and the first colour filter 5 is to incident beam
Through wavelength be 253.7nm so that the wavelength of incident beam be 275.7nm, for mercury vapour to wavelength be 253.7nm purple
Incident beam is divided two-way to export by the selective absorbing of outer light, tubular gas chamber 2；
Step 2: closing optical window 25, adjustment rotating platform 8 refers to the direction at the light receiver end of photomultiplier tube 9
To the second plane mirror 4, light beam is exported from the beam projecting end 22 of tubular gas chamber, injects the first plane mirror 3 through the second colour filter 6
Then reflecting surface is incident to the light receiver end of photomultiplier tube 9 after the reflection of the first plane mirror 3 and the second plane mirror 4,
Photomultiplier tube 9 converts received light intensity and passes data to data collection and analysis device 10, records the light intensity electricity obtained at this time
Flow i1；
Step 3: closing the beam projecting end 22 of tubular gas chamber, optical window 25, the opening direction of optical window 25 are opened
Vertical with light transmission direction in tubular gas chamber 2, the detector for meeting fluorescence intensity will be placed on and mercury lamp emission light beam
Requirement on position at right angle, adjustment rotating platform 8 make the direction at the light receiver end of photomultiplier tube 9 be directed toward optical window
25, light beam is incident to the light receiver end of photomultiplier tube 9, record data acquisition point from optical window 25 through third colour filter 7
The light intensity electric current i that parser 10 exports2；
Step 4 calculates the mercury concentration C obtained under test gas according to the following formulaHg；
Wherein,For fluorescence coefficient, εHgIt is the absorption coefficient of unit length and unit concentration medium for mercury.
In the present embodiment, the fluorescence coefficientPreparation method are as follows:
Step A: being passed through pure nitrogen gas in tubular gas chamber 2, opens light source 1, closes optical window 25, measurement is absorbed
Light intensity I0；
Step B: it is c that known mercury vapour concentration is passed through in tubular gas chamber 2HgStandard mercury vapour, open light source 1, pass through respectively
Cold-vapour atomic absorption method and Pressurized sample digestion, which measure, absorbs light intensity I1With fluorescent intensity I2；
Step C: according to formulaFluorescence coefficient can be obtainedValue.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection scope.
Claims (7)
1. a kind of non-calibrating device of mercury analyzer, it is characterised in that: including light source (1), tubular gas chamber (2), the first plane mirror
(3), the second plane mirror (4), the first colour filter (5), the second colour filter (6), third colour filter (7), rotating platform (8), photoelectricity
Multiplier tube (9) and data collection and analysis device (10)；The tubular gas chamber (2) is hollow structure, and both ends are respectively light incidence
It holds (21) and beam projecting end (22), the top of tubular gas chamber is symmetrically arranged with air inlet (23) and gas outlet for gas disengaging
(24), tubular gas chamber lower part is equipped with optical window (25)；The light source (1) is fixedly installed in the light incidence end of tubular gas chamber
(21), the first colour filter (5) are equipped between light source (1) and light incidence end (21)；The beam projecting end of the tubular gas chamber
(22) the first plane mirror (3) are equipped with, are equipped with the second colour filter (6) between beam projecting end (22) and the first plane mirror (3)；It is described
Second plane mirror (4) is vertical at below the first plane mirror (3), the reflecting surface phase of the first plane mirror (3) and the second plane mirror (4)
To setting；The rotating platform (8) is vertical at the underface of optical window (25), and along the height of the second plane mirror (4)
It is horizontally disposed, third colour filter (7) are equipped between optical window (25) and rotating platform (8)；It is fixed on the rotating platform (8)
Be connected with photomultiplier tube (9), when the photomultiplier tube (9) rotates, the light receiver end of photomultiplier tube can respectively with light
The reflecting surface of window (25) and the second plane mirror (4) is corresponding and receives the measurement light exported from tubular gas chamber；The light
The signal output end of electric multiplier tube (8) is connect with data collection and analysis device (10), and the data collection and analysis device (10) is for defeated
Out by the light intensity electric current of photomultiplier measurement.
2. a kind of non-calibrating device of mercury analyzer according to claim 1, it is characterised in that: the optical window (25)
Opening direction it is vertical with the interior light transmission direction of tubular gas chamber (2).
3. a kind of non-calibrating device of mercury analyzer according to claim 1, it is characterised in that: first colour filter
(5), the second colour filter (6) and third colour filter (7) are 253.7nm to the wavelength that penetrates of incident beam.
4. a kind of non-calibrating device of mercury analyzer according to claim 1, it is characterised in that: the tubular gas chamber (2)
For silica glass tube, the glass inside pipe wall is equipped with Teflon coating (26).
5. a kind of non-calibrating device of mercury analyzer according to claim 1, it is characterised in that: described device can use
Cold-vapour atomic absorption method or Pressurized sample digestion carry out the measurement of gas mercury concentration；Wherein, the optical window (25) is for exporting
The measurement light of Pressurized sample digestion, the beam projecting end (22) of the tubular gas chamber are used to export the measurement of cold-vapour atomic absorption method
Light.
6. the measuring method of mercury analyzer non-calibrating device described in a kind of claim 5, which is characterized in that including following step
It is rapid:
Under test gas is passed through tubular gas chamber (2) by step 1, is opened light source (1), light beam launched by light source is through the first colour filter
(5) enter tubular gas chamber (2) from light incidence end (21) after, incident beam is divided two-way to export by tubular gas chamber (2)；
Step 2: closing optical window (25), adjust rotating platform (8), the beam projecting end (22) of light beam from tubular gas chamber is defeated
Out, the reflecting surface of the first plane mirror (3) is injected through the second colour filter (6), then passes through the first plane mirror (3) and the second plane mirror
(4) the light receiver end of photomultiplier tube (9), the light intensity electricity of record data collection and analysis device (10) output are incident to after reflection
Flow i1；
Step 3: closing the beam projecting end (22) of tubular gas chamber, open optical window (25), adjusts rotating platform (8), light beam
The light receiver end of photomultiplier tube (9) is incident to through third colour filter (7) from optical window (25), records data collection and analysis
The light intensity electric current i of device (10) output2；
Step 4 obtains the mercury concentration C under test gas according to formulaHg；
Wherein,For fluorescence coefficient, εHgIt is the absorption coefficient of unit length and unit concentration medium for mercury.
7. the measuring method of mercury analyzer non-calibrating device according to claim 6, it is characterised in that: the fluorescence coefficientPreparation method are as follows:
Step A: being passed through pure nitrogen gas in tubular gas chamber (2), opens light source (1), closes optical window (25), and measurement is inhaled
Receive light intensity I0；
Step B: it is c that known mercury vapour concentration is passed through in tubular gas chamber (2)HgStandard mercury vapour, open light source (1), pass through respectively
Cold-vapour atomic absorption method and Pressurized sample digestion, which measure, absorbs light intensity I1With fluorescent intensity I2；
Step C: according to formulaFluorescence coefficient can be obtainedValue.
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| CN201811452237.8A CN109342344B (en) | 2018-11-30 | 2018-11-30 | Calibration-free device of mercury analyzer and determination method thereof |
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| CN201811452237.8A CN109342344B (en) | 2018-11-30 | 2018-11-30 | Calibration-free device of mercury analyzer and determination method thereof |
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| Title |
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| 李刚 等: "HG-AFS仪双道测定铋汞时光谱干扰及其消除", 《矿物岩石》 * |
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| CN109342344B (en) | 2021-02-02 |
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