CN2694265Y - Second order differential flame emission spectrum trace quantity sodium intellect analyzer - Google Patents
Second order differential flame emission spectrum trace quantity sodium intellect analyzer Download PDFInfo
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- CN2694265Y CN2694265Y CN 03224297 CN03224297U CN2694265Y CN 2694265 Y CN2694265 Y CN 2694265Y CN 03224297 CN03224297 CN 03224297 CN 03224297 U CN03224297 U CN 03224297U CN 2694265 Y CN2694265 Y CN 2694265Y
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Abstract
The utility model discloses a second order differential flame emission spectrum trace quantity sodium intellect analyzer, comprising an air-acetylene premixed and spray combusted flame atomizer, a 589.0 nm wavelength modulation second order differential sodium spectrum precision grating monochromator, a photomultiplier tube, a micro electric lock-in amplifier, a data processor for microcomputer, a keyboard, and a data display screen. The monochromator consists of a fixed wavelength precision grating, a fixed width entrance slit, a collimating mirror, a focusing objective lens, a wavelength modulation scanning device and an exit slit. The wavelength modulation scanning device comprises a cone loudspeaker and a plane mirror which is on the cone. The drive coil of the loudspeaker is driven by a triangular wave from the lock-in amplifier so that the plane mirror is driven to move back and forth rapidly. As a result, the 589.0 nm sodium characteristic spectral line scans fast around the exit slit to generate a second order derivative spectrum. The utility model has the advantages that various background interference around the sodium D ray is automatically deducted, sensitivity is high, and detection limit is less than 0.1 mu g/kg. The second order differential flame emission spectrum trace quantity sodium intellect analyzer is a good replacement for large-scale complex apparatus, such as ion chromatographs.
Description
Technical field
The utility model relates to a kind of trace sodium analyser.
Background technology
The production of steam device of modern high parameter (critical, subcritical) high capacity (300MW 600MW and more than) fuel-burning power plant, nuclear power station such as boiler, steam generator, nuclear reactor etc., in order to guarantee to destroy with the water of high temperature, high pressure, the structural metallic materials corrosion that steam contacts, guarantee the safe operation of fuel-burning power plant and nuclear power station, the sodium content in control and the supervision steam is a kind of very important means.In the power industry standard DL/T561-95 of the People's Republic of China (PRC) " water vapor school superintendent in fuel-burning power plant supervises and guides then " this has been made strict clear and definite mandatory provisions, its control criterion is＜10 μ g/kg.GNPS water quality control criterion regulation: the sodium control criterion of steam generator feedwater and steam generator water is＜5.0 μ g/kg under the normal operating condition.
At present, the instrument of fuel-burning power plant, used in nuclear power station sodium content in measuring water, vapour mainly is based on ion-selective electrode (PNa meter) and various types of atomic absorption spectrophotometer (AAS) of electrochemical principle design both at home and abroad.Its analysis detection limit of the import instrument that the online low sodium monitor of producing with U.S. ORION RESEARCH of 1811EL type is representative is introduced according to producer and can be lower than 0.1 μ g/kg, and the precision of breadboard survey sodium instrument is lower than the on-line monitoring instrument of import on the contrary.Regulation according to " water vapor school superintendent in fuel-burning power plant supervises and guides then " the 2.20th: " the thermal power generation chemistry laboratory should dispose instrument or the instrument that accuracy class is higher than online chemical instruments ", so the Laboratory Instruments of sodium content can not satisfy the production actual needs in fuel-burning power plant, nuclear power station mensuration water, the vapour at present.
The principle that " ion-selective electrode " measures sodium content is that the semilog of the gibbs equation inference with thermodynamic equilibrium " Nernst equation " that come out closes is basic engineering, and its relationship is: E=E
X+ 2.3RT/nF log A is with reference to " electrode technology handbook.Under the condition of sodium content extremely low (A → 0), because the nonexistence of logarithmic function makes this method be applied to trace analysis on the mathematics credibility and accuracy have been subjected to query.
The atomic absorption spectrophotometer (AAS) of the present model of using miscellaneous, owing near sodium D-line (589.0nm and 589.6nm), have the continuous spectrum of flame high temperature particulate emission and the band spectrum of molecularity material emission etc. strong " background interference ", although adopted the technology of various raising signal to noise ratio (S/N ratio)s, but it can only reach the Limiting Level of 2-100 μ g/kg to the detection limit of sodium, referring to document: 1. " analytical chemistry handbook the third volume of a work: spectral analysis, second edition in 1988; 2. " chemistry circular " 1991, (11): 41; 3. U.S. PERKIN ELMER SAA5100PC Atomic Absorption Spectrometer operation instructions: Electricite De France technique center (EDF-SPTGRPT); 4.Z5300 type Zeeman AAS instrument operation instructions: Zhuhai Power Plant technical information.
Summary of the invention
The purpose of this utility model is the problems referred to above that the instrument at sodium content in existing various measurement water, the vapour exists, provide a kind of accurately and reliably, easy to operate, technical feature can satisfy the second-order differential flame emission spectrum trace sodium intelligent analytical instrument that fuel-burning power plant, nuclear power station water, stripper chemical supervision detection limit needs, that make sodium are less than 0.1 μ g/kg level.
The purpose of this utility model is achieved in that the utility model comprises air-acetylene premixed spray burning flame atomizer, wavelength-modulated 589.0nm second-order differential sodium light spectrum precise grating monochromator (being called for short " wavelength-modulated precise grating monochromator " or " monochromator "), photomultiplier, little electric current lock-in amplifier, the microcomputer data processing device, keyboard and data display screen, the flame kernel of described flame atomizer is over against the entrance slit center of wavelength-modulated precise grating monochromator, the exit slit of wavelength-modulated precise grating monochromator is over against the light path inlet of photomultiplier, the output anode of photomultiplier is right after the input end of the prime amplifier of little electric current lock-in amplifier, the input end of the output termination microcomputer data processing device of little electric current lock-in amplifier, the microcomputer data processing device links to each other with data display screen with keyboard;
Described wavelength-modulated 589.0nm second-order differential sodium light spectrum precise grating monochromator comprises the fixed wave length precise grating, the fixed width entrance slit, collimating mirror, focusing objective len, the Wavelength modulation spectroscopy scanister, exit slit, the Wavelength modulation spectroscopy scanister comprises plane mirror and cone loudspeaker, plane mirror is fixed on the cone of cone loudspeaker, the drive wire Quan of cone loudspeaker links to each other with the output terminal of the frequency dividing circuit of lock-in amplifier, from the frequency of lock-in amplifier phase-shift circuit is that the symmetrical square wave pulse of 2F is through differential, trigger, integration, the frequency that forms behind 1/2 frequency division is the drive wire Quan that the triangular wave of F drives cone loudspeaker, collimating mirror is located on the light path of the incident light of injecting from the fixed width entrance slit, on the light path of the reflected in parallel light of collimating mirror, be provided with the fixed wave length precise grating, focusing objective len is located on the monochromatic light path of fixed wave length precise grating output, and the plane mirror of Wavelength modulation spectroscopy scanister is located on the catoptrical light path of focusing objective len, the reflected light directive exit slit of plane mirror.
Principle of work of the present utility model is: sample to be analyzed enters air-acetylene premixed spray burning flame atomizer through the sample introduction kapillary, under the hot conditions of flame, sodion in the analytical sample is stimulated and produces the signature analysis spectral line of sodium, accompany and generate a series of background interference band spectrums and continuous spectrum, inject by the fixed width entrance slit of wavelength-modulated 589.0nm second-order differential sodium light spectrum precise grating monochromator as incident light, after collimating mirror is adjusted incident angle, become directional light and incide the fixed wave length precise grating, the incident beam monochromatic light that has only the 589.0nm characteristic spectral line of sodium after the wavelength precise grating dispersion precision light-splitting processing that is fixed penetrates grating output, by the sodium characteristic spectral line line focus object lens focusing back reflection to be detected of the 589.0nm of fixed wave length precise grating output planar mirror surface to the Wavelength modulation spectroscopy scanister, produce and the output modulating frequency is the second derivative spectrum of the sodium characteristic spectral line of 2F 2 times 589.0nm promptly equaling plane mirror turntable driving frequency, the second derivative spectrum that this bundle modulating frequency is 2F is reflected after exit slit penetrates and enters photomultiplier and be converted into analog electrical signal output.The ultra-weak electronic signal of photomultiplier output in detuner is the direct current signal that output becomes the good linear relation after the symmetrical square wave demodulation of 2F with the sample sodium content again by frequency after little electric current lock-in amplifier amplifies, and the direct current signal of exporting is carried out digitized processing with the microcomputer data processing device and regressing calculation directly provides accurate measurement result.
Technique effect of the present utility model is: the utility model can remove near the continuous spectrum of the flame high temperature particulate emission that exists the sodium D-line and the band spectrum of molecular state material emission etc. strong " background interference " by bales catch, highly sensitive, detection limit is less than 0.1 μ g/kg, the measuring accuracy height, easy to use, the special use that can be used as large complicated instruments such as ion chromatograph, nonflame Atomic Absorption Spectrometer substitutes instrument.The utility model is applicable to the fast detecting of trace sodium ions content in the condensate water, feedwater, high pressure steam of large-size thermal power plant, nuclear power station, can be high parameter, high-capacity direct current boiler, dum boiler realization neutral water operating mode and oxygenation water condition provides the detection means quick and precisely of sodium content, also can be used as the laboratory other commodity sodion is measured the calibration instrument of instrument such as ion selective electrode method, also can be used for the mensuration of trace sodium in high-purity chemical reagent of other industry simultaneously.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the structured flowchart of the utility model one embodiment.
Fig. 2 is light path and the Circuits System block diagram of embodiment.
Fig. 3 is the light channel structure figure of monochromator among the embodiment.
Fig. 4 is the structural drawing of monochromator medium wavelength modulation scanning apparatus.
Fig. 5 is the refractive power synoptic diagram of wavelength-modulated scanning apparatus midplane catoptron.
Fig. 6 is a data handling system block diagram among the embodiment.
Fig. 7 is 2 standardization analysis operation flow charts.
Fig. 8 is the keyboard operation flow chart of measuring after finishing with 2 standardizations demarcation.
Fig. 9 is the keyboard operation flow chart of 5 standardizations.
Figure 10 is the analysis operation FB(flow block) of present embodiment.
Figure 11 is the internal work process block diagram of present embodiment.
Embodiment
As shown in Figure 1, the main function components of present embodiment comprises: air-acetylene premixed spray burning flame atomizer 3, wavelength-modulated 589.0nm second derivative sodium light spectrum precise grating monochromator 4 (hereinafter to be referred as " wavelength-modulated precise grating monochromator 4 ", or " monochromator 4 "), photomultiplier 5, little electric current lock-in amplifier 6, microcomputer data processing device 7, keyboard 8, data display screen 9, high purity acetylene fuel gas 10, oil-free air compressor 11.The air of high purity acetylene fuel gas 10 and oil-free air compressor 11 inserts burning generation thermal-flame in air-acetylene premixed spray burning flame atomizer 3, analytical sample 1 enters air-acetylene premixed spray burning flame atomizer 3 via sample introduction kapillary 2, under the hot conditions of flame, the sodion in the analytical sample is stimulated to produce the signature analysis spectral line of sodium and accompany and generates a series of background interference band spectrums and continuous spectrum; The flame kernel of air-acetylene premixed spray burning flame atomizer 3 is over against the entrance slit center of wavelength-modulated precise grating monochromator 4, the exit slit of wavelength-modulated precise grating monochromator 4 is over against the light path inlet of photomultiplier 5, the output anode of photomultiplier 5 be right after little electric current lock-in amplifier 6 the input end of prime amplifier 20 of the high input impedance of forming by field effect transistor, the input end of the output termination microcomputer data processing device 7 of little electric current lock-in amplifier 6 is an A/D converter, and microcomputer data processing device 7 links to each other with data display screen 9 with keyboard 8.
As shown in Figures 2 and 3, the wavelength-modulated precise grating monochromator 4 among the embodiment comprises that mainly fixed wave length precise grating 12, width are functional parts such as the fixed width entrance slit 13, collimating mirror 14, focusing objective len 15, Wavelength modulation spectroscopy scanister 16, exit slit 17 of 0.1mm; Wherein Wavelength modulation spectroscopy scanister 16 comprises plane mirror 31 and cone loudspeaker 32, plane mirror 31 is securely fixed on the cone of cone loudspeaker 32 as shown in Figure 4, the drive wire Quan of cone loudspeaker 32 links to each other with the output terminal of 1/2 frequency dividing circuit 28 of lock-in amplifier, from the frequency of lock-in amplifier phase-shift circuit 27 is that the symmetrical square wave pulse of 2F is through differential, trigger, integration, the frequency that forms behind 1/2 frequency division is the drive wire Quan that the triangular wave of F drives cone loudspeaker 32, collimating mirror 14 is located on the light path of the incident light of injecting from fixed width entrance slit 13, on the light path of the reflected in parallel light of collimating mirror 14, be provided with fixed wave length precise grating 12, focusing objective len 15 is located on the monochromatic light path of fixed wave length precise grating 12 outputs, and the plane mirror 31 of Wavelength modulation spectroscopy scanister 16 is located on the catoptrical light path of focusing objective len 15, the reflected light directive exit slit 17 of plane mirror 31.
The light path of wavelength-modulated precise grating monochromator 4 is: the incident light that sample produces after by atomization, comprise the compound spectral line that sodium element characteristic spectral line to be measured and diversity of settings disturb spectral line, inject by fixed width entrance slit 13, be transformed into directional light and incide fixed wave length precise grating 12 after collimating mirror 14 is adjusted incident angles, parallel incident beam is fixed and has only the monochromatic light of the 589.0nm characteristic spectral line of sodium to penetrate grating output after the 12 accurate chromatic dispersion beam split of wavelength precise grating; Sodium characteristic spectral line monochromatic light line focus object lens to be detected 15 by the 589.0nm of fixed wave length precise grating 12 output focus on the surface of back reflections to the plane mirror 31 of Wavelength modulation spectroscopy scanister 16, produce and the output modulating frequency is the second derivative spectrum of the sodium characteristic spectral line of 2F 2 times 589.0nm promptly equaling plane mirror turntable driving frequency, the second derivative spectrum that this bundle modulating frequency is 2F is reflected and enters photomultiplier 5 after exit slit 17 penetrates.
As shown in Figure 2, little electric current lock-in amplifier comprises prime amplifier 20, main amplifier 21, detuner 22, pulse producer 26, phase shifter 27 (or title " phase-shift circuit 27 "), 1/2 frequency dividing circuit 28, the frequency that the pulse producer 26 of little electric current lock-in amplifier takes place is that the pulse one tunnel (pulse front edge) of 2F (333c/s) produces the symmetrical square wave input detuner 22 that frequency is 2F (333c/s) through monostable trigger again behind differential, is that the second derivative spectrum modulation signal of 2F (333c/s) carries out demodulation to the frequency from main amplifier 21 outputs; The triangular wave that another road (pulse back edge) produces a frequency successively after phase shifter 27,1/2 frequency dividing circuit 28 is handled be F (167c/s) is used to drive cone loudspeaker 32 after scan power driver 29 carries out power amplification, plane mirror 31 on the cone that is installed in cone loudspeaker 32 is moved forward and backward fast, make from the sodium analysis spectral line of the 589.0nm of focusing objective len 15 exit slit about 17 fast scanning to produce modulating frequencies be the modulated second derivative spectrum of 2F (333c/s).As shown in Figure 5, when the displacement of Δ d is done in plane mirror 31 front and back, its reflection spectral line produces Δ λ on the normal plane of exit slit 17 displacement.The fixed wave length precise grating 12 of wavelength-modulated precise grating monochromator 4 is designed to only fill the 589.0nm characteristic spectral line of being permitted sodium and levies spectral line by second Gent that also can accurately separate sodium 589.6nm.24 is line strength indicating gauge among Fig. 2, is connected with detuner 22, and 25 is instrument power, and 18 is the negative high voltage indicating gauge, and 19 is negative high voltage power source.It is light source condenser 30 that present embodiment also is equipped with a concave mirror in flame the place ahead of air-acetylene premixed spray burning flame atomizer 3, and it can make the strength-enhanced of the incident light that enters the accurate monochromator entrance slit 13 of wavelength-modulated.
In order when measuring faint optical signal, to obtain the measuring-signal of high-fidelity, it is 100Hz-400Hz low frequency pass band wave filter that present embodiment has all designed the passband width at the inlet end of prime amplifier 20 and main amplifier 21, is used for intercepting effectively the high frequency random pulse interference that power frequency 50Hz disturbs and photomultiplier produces when detecting faint optical signal.Adopt phase-locked amplification and phase sensitive detection technology to realize, with the high sensitivity, high stability and the acquisition that the guarantee instrument low detection limit of trying one's best to Detection of weak with to effective inhibition of various electric noises.
When the trace spectral analysis, the faint light electric signal that comes out from photomultiplier, usually has only several millivolts amplitude, directly this ultra-weak electronic signal of transmission is easy to be flooded by extraneous electric noise interference, therefore present embodiment amplifies in advance by 20 pairs of faint light electric signal of the prime amplifier with high input impedance of being made up of field effect transistor, amplifier gain is about 600 times, and on line design, prime amplifier 20 is designed to a slight wiring board, be directly installed on the base of photomultiplier 5, like this, only directly guide to the first order input end of prime amplifier 20 through one section long screened feeder of about 2cm from the feeble signal of photomultiplier 5 anodes output, with photomultiplier 5, signal feed and metallic shield of prime amplifier 20 usefulness shield, and can make the interference of the stray EM field, space that the power current from the 50Hz industrial power causes be reduced to minimum degree.
As shown in Figure 6, the data handling system of present embodiment comprises: the detuner 22 of keyboard 8, data display screen 9, lock-in amplifier and microcomputer data processing device, the microcomputer data processing device comprises data input 33, clock 34, CPU35, memory 36, A/D fast-acting divereter 37, line strength simulating signal of being exported by the detuner 22 of lock-in amplifier converts digital signal to behind A/D fast-acting divereter 37, input among the CPU35 through data input 33 and handle, result is shown by data display screen 9.
The internal work process of present embodiment model machine as mentioned above, as shown in figure 11.Complete machine gain amplifier coefficient is 2 * 10
4-6 * 10
4
The technical indicator of 589.0nm second derivative sodium light spectrum precise grating monochromator is as follows in the present embodiment model machine:
1. fixed wave length: 589.0nm;
2. wavelength resolution: 0.6nm can obviously separate sodium D-line;
3. focal length: 300mm;
4. grating specification (incisure density): 1,200L/mm;
5. parasitic light: 0.001;
6. entrance slit fixed width: 0.1mm;
7. plane mirror: 30 * 30 * 0.4mm is precision machined coated glass;
8. cone loudspeaker: φ 50mm.
Other main components and parts specification is as follows in the present embodiment model machine:
Photomultiplier: adopt shore pine (Japanese HAMAMATSU) R928 type 28mm, nine multiplication by stages side window types; Photomultiplier negative high voltage module :-1000V is adjustable, output current 1mA; Microcomputer data processing device: the U.S. 89C52 of Atmel company type; LCDs: FM1623B type; Air compressor: KJ-BII type oilless air compressor, its technical manual is as follows: nominal volume flow: 0.3-0.9m
3/ H, rated discharge pressure: 0-0.3MPa.
Detect through State Standard Matter Research Centre, every technical indicator of present embodiment reaches following standard:
Detection limit :≤0.1 μ g/kg;
Precision :≤1.5%;
Linearly dependent coefficient: 〉=0.995;
Sample is inhaled discharge rate: 〉=3ml/min;
Response time :≤8s;
Stability :≤3.0%;
Wavelength resolution: obviously separate 589.0nm and 589.6nm sodium D-line.
The actual tests measurement result is as follows:
Data 1 (test period: 20011025, measuring unit: State Standard Matter Research Centre):
Detection limit: 0.05 μ g/kg;
Precision: 0.2%;
Linearly dependent coefficient: 0.999;
Sample is inhaled discharge rate: 7.4ml/min;
Response time: 5s;
Stability: 2.4%;
Wavelength resolution: obviously separate 589.0nm and 589.6nm sodium D-line.
Data 2 (test period: 20011026, measuring unit: State Standard Matter Research Centre):
Detection limit: 0.06 μ g/kg;
Precision: 1.0%;
Linearly dependent coefficient: 0.999;
Sample is inhaled discharge rate: 7.2ml/min;
Response time: 5s;
Stability: 2.1%;
Wavelength resolution: obviously separate 589.0nm and 589.6nm sodium D-line.
Data 3 (test period: 20020416, measuring unit: Electric Power Experiment Inst., Hunan Prov.):
Detection limit: 0.03 μ g/kg;
Precision: 0.6%;
Linearly dependent coefficient: 0.999;
Stability: 2.4%.
Present embodiment is easy and simple to handle, and instrument only needs 1-2 minute time from sample introduction to drawing analysis result after demarcating, and is particularly suitable for the on-the-spot chemical supervision fast measuring of the power plant needs of sample in batches, and its concrete proving operation program is as follows:
Demarcate 1: " two-point calibration method " or " standard addition method ":
" 2 standardizations " timing signal is as long as measure two standard specimens: 0# standard specimen and 1# standard specimen.
The 0# standard specimen please notes for " blank water " is that sodium titer addition is zero original sample: it is not that the sodium content of sample is zero, and it can be high purity water or sample to be analyzed.
The 1# standard specimen is the standard specimen that adds known standard sodium addition in the 0# standard specimen.Sodium standard addition should be generally 1.5-2.0 doubly greater than the sodium content of sample to be analyzed in the actual analysis operation, and concrete computing formula is derived as follows:
If the na concn of 0# standard specimen to be analyzed or blank water is C
0μ g/kg, line strength meter reading are I
0μ A,
Press Л О М А К И Н formula:
I
0＝βC
0 (1)
The 1# standard specimen is to add C to 0# standard specimen or blank water
1The standard sample of μ g/kg na concn is keeping under the constant equal measuring condition of negative high voltage, and line strength meter reading is I
1μ A, press Л О М А К И Н formula:
I
1＝β(C
0+C
1) (2)
Put in order: C
0=I
0C
1/ I
1-I
0(3)
Be the slope β=I of typical curve
1-I
0/ C
1(4)
The data handling system of present embodiment can be carried out the regretional analysis of calibration result automatically.
From above-mentioned derivation as seen: when " 2 standardizations " that adopts this instrument to provide measured trace sodium sample, and do not require that the laboratory possesses " prerequisite " of " sodium-free water ", just can measure accurately as " blank " as long as use the trace sodium content with the water of the same level of sample sodium content.After 2 standardizations were demarcated and finished, the instrument display screen can demonstrate slope β value, also demonstrates the background na concn C of 0# standard specimen simultaneously
0Value.If the 0# standard specimen is exactly a sample to be tested, in fact just provided measurement result.After demarcation is finished, just can measure other sample to be tested, finish up to a batch sample is all measured.2 standardization analysis operation programs as shown in Figure 7.
The keyboard operation program of measuring after demarcation is finished, as shown in Figure 8.
Demarcate 2: five standardizations:
Each standard specimen number consecutively is 0#, 1#, 2#, 3#, 4#.Inhale spray 4# standard specimen and regulate negative high voltage, make reading, press in 40 μ A-50 μ A scopes
And import ppb (μ g/kg) value of each standard specimen successively, instrument will provide the result after the recurrence automatically, provide A, B, R value.Its keyboard operation program as shown in Figure 9.
The keyboard operation of measuring after demarcation is finished also as shown in Figure 8.
The analysis operation flow process of present embodiment model machine as shown in figure 10.
Claims (1)
1. second-order differential flame emission spectrum trace sodium intelligent analytical instrument, it is characterized in that: comprise air-acetylene premixed spray burning flame atomizer, wavelength-modulated 589.0nm second-order differential sodium light spectrum precise grating monochromator, photomultiplier, little electric current lock-in amplifier, the microcomputer data processing device, keyboard and data display screen, the flame kernel of described flame atomizer is over against the entrance slit center of wavelength-modulated precise grating monochromator, the exit slit of wavelength-modulated precise grating monochromator is over against the light path inlet of photomultiplier, the output anode of photomultiplier is right after the input end of the prime amplifier of little electric current lock-in amplifier, the input end of the output termination microcomputer data processing device of little electric current lock-in amplifier, the microcomputer data processing device links to each other with data display screen with keyboard;
Described wavelength-modulated 589.0nm second-order differential sodium light spectrum precise grating monochromator comprises the fixed wave length precise grating, the fixed width entrance slit, collimating mirror, focusing objective len, the Wavelength modulation spectroscopy scanister, exit slit, the Wavelength modulation spectroscopy scanister comprises plane mirror and cone loudspeaker, plane mirror is fixed on the cone of cone loudspeaker, the drive wire Quan of cone loudspeaker links to each other with the output terminal of the frequency dividing circuit of lock-in amplifier, collimating mirror is located on the light path of the incident light of injecting from the fixed width entrance slit, on the light path of the reflected in parallel light of collimating mirror, be provided with the fixed wave length precise grating, focusing objective len is located on the monochromatic light path of fixed wave length precise grating output, and the plane mirror of Wavelength modulation spectroscopy scanister is located on the catoptrical light path of focusing objective len, the reflected light directive exit slit of plane mirror.
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| CN 03224297 CN2694265Y (en) | 2003-03-14 | 2003-03-14 | Second order differential flame emission spectrum trace quantity sodium intellect analyzer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680454A (en) * | 2011-09-20 | 2012-09-19 | 深圳市爱诺实业有限公司 | Second-order differential flame emission spectrometer |
| CN103958831A (en) * | 2011-12-13 | 2014-07-30 | 哈里伯顿能源服务公司 | Optical computation fluid analysis system and method |
| CN104198467A (en) * | 2014-09-16 | 2014-12-10 | 安徽新力电业科技咨询有限责任公司 | Test method for cleaning effect of sample containing cup |
| WO2018000284A1 (en) * | 2016-06-29 | 2018-01-04 | 深圳市爱诺实业有限公司 | Online monitor for high-purity water trace sodium, online monitoring method and device therefor |
| CN109799077A (en) * | 2019-03-01 | 2019-05-24 | 中国科学院长春光学精密机械与物理研究所 | The linear variable filter detection device of imaging spectrometer |
-
2003
- 2003-03-14 CN CN 03224297 patent/CN2694265Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680454A (en) * | 2011-09-20 | 2012-09-19 | 深圳市爱诺实业有限公司 | Second-order differential flame emission spectrometer |
| CN102680454B (en) * | 2011-09-20 | 2014-06-18 | 深圳市爱诺实业有限公司 | Second-order differential flame emission spectrometer |
| CN103958831A (en) * | 2011-12-13 | 2014-07-30 | 哈里伯顿能源服务公司 | Optical computation fluid analysis system and method |
| CN104198467A (en) * | 2014-09-16 | 2014-12-10 | 安徽新力电业科技咨询有限责任公司 | Test method for cleaning effect of sample containing cup |
| WO2018000284A1 (en) * | 2016-06-29 | 2018-01-04 | 深圳市爱诺实业有限公司 | Online monitor for high-purity water trace sodium, online monitoring method and device therefor |
| CN107636448A (en) * | 2016-06-29 | 2018-01-26 | 深圳市爱诺实业有限公司 | High purity water trace amounts of sodium on-line computing model and its on-line monitoring method and device |
| US10788474B2 (en) | 2016-06-29 | 2020-09-29 | Shenzhen Ener-Chemistry Industrial Co., Ltd. | Online monitor for trace sodium in high-purity water, and online monitoring method and device thereof |
| CN109799077A (en) * | 2019-03-01 | 2019-05-24 | 中国科学院长春光学精密机械与物理研究所 | The linear variable filter detection device of imaging spectrometer |
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