CN101852721A - Device for detecting concentration of transparent mixed solution with two solutes - Google Patents
Device for detecting concentration of transparent mixed solution with two solutes Download PDFInfo
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- CN101852721A CN101852721A CN 201010175869 CN201010175869A CN101852721A CN 101852721 A CN101852721 A CN 101852721A CN 201010175869 CN201010175869 CN 201010175869 CN 201010175869 A CN201010175869 A CN 201010175869A CN 101852721 A CN101852721 A CN 101852721A
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- 239000011259 mixed solution Substances 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 230000010287 polarization Effects 0.000 claims abstract description 27
- 238000012545 processing Methods 0.000 claims abstract description 19
- 239000004065 semiconductor Substances 0.000 claims abstract description 11
- 230000005291 magnetic effect Effects 0.000 claims description 33
- 239000011521 glass Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 abstract description 40
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 30
- 239000000463 material Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 7
- 230000009102 absorption Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008033 biological extinction Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
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- 239000002504 physiological saline solution Substances 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
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Abstract
The invention discloses a device for detecting the concentration of a transparent mixed solution with two solutes. The device consists of a semiconductor laser (1), a polarization relevant optoisolator (2), a film polarization beam splitter prism (3), a sample pool and a magneto-optic modulator (4), a polaroid (5), photoelectric detectors (6 and 7), a division amplifier (8) and a microcomputer processing and displaying unit (9). The device has simple detection principle and easier device manufacturing; the division amplifier is adopted so as to improve system detection sensitivity and remove adverse influence due to instability of light source transmitted power at the same time; a non-invasive detection method is adopted, thus the device has no pollution on the solution; real-time and automatic detection can be realized by adopting the microcomputer processing and drawing display technology; and the technology has a better application prospect in detecting the concentration of the transparent mixed solution with the two solutes.
Description
Technical field
Patent of the present invention relates to a kind of two kinds of solute transparent mixed solution concentration detection apparatus and principle of work thereof, belongs to the technical field of Photoelectric Detection, photoelectric sensing and optical information processing.
Background technology
Magnetic is one of basic physical attribute of material, changes by some parameter that can understand material to the detection research of changing of magnetism, such as the solution of concentration information can understand to(for) the detection of the solution magnetic rotation optic angle that contains the paramagnetic solute.Magnetooptics is an ancient and unfailing subject, and it in the application in optical detection and photoelectric sensing field more and more widely; Wherein using maximum is faraday's magnetic rotation effect, comprises that current sensor, magnetic field sensor, magneto optic isolator, magneto-optic circulators etc. spread all over a plurality of optical fields such as light detection, light sensing, optical communication.
At industrial circles such as chemical industry, food and health cares, usually need the concentration of solution is detected, the concentration of solution physical quantitys many with it are correlate all, therefore as proportion, conductivity, refractive index, the velocity of sound, optical activity, Verdet constant etc., can characterize the variation of solution concentration in principle with the variation of a certain physical quantity wherein.At present the detection method for the solution concentration of single solute composition is a lot, and precision also reaches certain requirement; But usually need in the reality solute concentration of heterogeneity in the mixed solution is detected, it is generally complicated to detect principle and element manufacturing, and generally adopts the detection method of intrusive mood easily solution to be polluted.The natural-optical rotation effect principle that this paper itself has based on Faraday magnetooptical effect and some material
[1,2,3],, two kinds of solutes method of concentration is separately proposed to utilize in this specific blend solution of the disposable detection of magneto-optic technology at two kinds of solute transparent mixed solution of some special component.It is simple that this method detects principle, and element manufacturing is relatively easy; Adopt signal division amplification system to improve the detection sensitivity of system, eliminate the adverse effect that light source luminescent power instability is brought simultaneously; Adopt the detection method of non-intrusion type, pollution-free to solution; Utilize MICROCOMPUTER PROCESSING and drawing display technique to realize in real time, detect automatically; This technology will obtain application promise in clinical practice in two kinds of solute transparent mixed solution concentration detect.
Summary of the invention
Technical matters: the objective of the invention is to propose a kind of two kinds of solute transparent mixed solution concentration detection apparatus, solve the problem that two kinds of solute transparent mixed solution concentration detect.
Technical scheme: two kinds of solute transparent mixed solution concentration detection apparatus of the present invention comprise semiconductor laser, polarization relative photo isolator, film polarization beam splitter prism, sample cell and magneto-optic modulator, polaroid, first photodetector, second photodetector, division amplifier and MICROCOMPUTER PROCESSING and display unit;
The laser output of semiconductor laser is sent into the input end of sample cell and magneto-optic modulator and the input end of second photodetector by polarization relative photo isolator film polarization beam splitter prism, the output terminal of sample cell and magneto-optic modulator is sent into the input end of first photodetector by polaroid, the output termination division amplifier input terminal of first photodetector and second photodetector, the output termination MICROCOMPUTER PROCESSING and the display unit of division amplifier.
In sample cell and the magneto-optic modulator, sample cell adopts transparent column shape glass tube to make, and sample cell is provided with inlet and liquid outlet; Magneto-optic modulator adopts solenoid, thereby produces alternating magnetic field with alternating current for solenoid link; Sample cell places solenoid central axis position, and sample cell and solenoidal axis are parallel with incident ray.
First photodetector, second photodetector adopt model, photodetector that performance is all identical.
MICROCOMPUTER PROCESSING and display unit are used to gather the signal of being exported by the division amplifier and draw the shows signal curve.The solution that two kinds of solutes are formed is transparent, and requires have and have only a kind of solute to possess the natural-optical rotation effect, and another kind of solute or two kinds of solutes all have the magnetic rotation effect.The AC magnetic field that solenoid produces requires to be AC magnetic field.
Beneficial effect: according to above narration as can be known, the present invention has following characteristics:
The present invention utilizes the natural-optical rotation effect and the magnetic rotation effect of some material, has designed two kinds of solute transparent mixed solution concentration detection apparatus, this device utilize the magneto-optic technology can disposable detection solution in two kinds of solutes concentration separately.This method detection principle is simple, and element manufacturing is relatively easy, adopts signal division amplification system to improve the detection sensitivity of system, eliminates the adverse effect that light source luminescent power instability is brought simultaneously; Adopt the detection method of non-intrusion type, pollution-free to solution; Utilize MICROCOMPUTER PROCESSING and drawing display technique to realize in real time, detect automatically; Has very important using value in the solution concentration context of detection.
The innovation part is: two kinds of solute transparent mixed solution concentration detection apparatus of the present invention's design, can disposablely finish and detect two kinds of solutes concentration separately in the solution, adopt the work light intensity and the amplifying technique of being divided by with reference to light intensity simultaneously, improve the detection sensitivity of system, eliminated the adverse effect that light source luminescent power instability is brought; Utilize microcomputer technology to realize automatic reading of data, calculate testing result automatically, can realize in real time, detect automatically.
Description of drawings
Two kinds of solute transparent mixed solution of Fig. 1 concentration detection apparatus synoptic diagram.Semiconductor laser 1, polarization relationship type optoisolator 2, film polarization beam splitter prism 3, sample cell and magneto-optic modulator 4, polaroid 5, first photodetector 6, second photodetector 7, division amplifier 8, MICROCOMPUTER PROCESSING and display unit 9 are arranged among the figure.
Embodiment
Two kinds of solute transparent mixed solution concentration detection apparatus of patent of the present invention as shown in Figure 1.Light source adopts semiconductor laser light resource 1 among the figure, the laser that sends reenters and is divided into the mutually perpendicular two-beam in polarization direction after being incident upon polarization beam splitter prism 3 through becoming linearly polarized light behind the optoisolator 2, be reflected the polarized light of the s component that enters second photodetector 7 as the reference light signal, and direction of vibration is perpendicular to paper; As the work light signal, direction of vibration is parallel to paper by the polarized light of the p component of transmission process film polarization beam splitter prism 3; Finally receive by first photodetector 6.The laser beam that sends with laser instrument is a central shaft rotation optoisolator, promptly changes the angle (being made as α) between direction and the p light components of shaking thoroughly of optoisolator 2, can change the size of relative intensity between this two-beam (s component and p component).Usually need make the α value less so that the work light signal is stronger, reference optical signal a little less than, thereby can improve the detection sensitivity of system by the amplification that is divided by of division amplifier 8.
The effect of optoisolator 2 is to stop reflected light that light source is impacted, and the light that light source is sent becomes linearly polarized light.
The direction of shaking thoroughly of polaroid 5 is vertical with the transmitted light polarization direction of film polarization beam splitter prism 3.
MICROCOMPUTER PROCESSING and display unit 9 are used to gather the signal of division amplifier 8 outputs, and be that transverse axis is drawn among same the figure with time automatically with the signal that collects and the excitation AC signal of modulator 4, according to the curve of drawing, automatically read the light intensity value of correlative measurement pilot and finish correlation computations, final display density test result.
Pass to ac signal i=i for magneto-optic modulator 4
0Sin ω t, thus alternating magnetic field B=B produced
0Sin ω t makes solution produce the magnetic rotation optic angle, and then has light signal to enter first photodetector 6, can detect the concentration of solution by the intensity signal that receives.
Two kinds of solute transparent mixed solution optical detecting methods that the present invention proposes require have and have only a kind of solute to have the natural-optical rotation effect in two kinds of solutes, have carbohydrate, Aminosteril KE, enzyme, part medicine etc. to have the material of helical molecular structures such as the common material with natural-optical rotation effect
[2,3]Another kind of solute or two kinds of solutes all obviously have the magnetic rotation effect; Material of forming such as the common material that obviously has the magnetic rotation effect such as salt, alcohols, alkanes and some macromolecular structures etc.
[1,3]More common in scientific research and commercial production by the mixed solution that above two class materials are constituted, just meet this testing conditions such as mensuration sugared in the physiological saline and salt.Now all have the magnetic rotation effect and suppose that two kinds of solute magnetic rotation directions are all example analysis mutually with two kinds of solutes, magnetic rotation direction reverse situation analysis classes seemingly, if having only another kind of solute to have Faraday effect then to analyze situation simpler.
If the concentration of A material and B material is respectively C in the solution
AAnd C
B, establishing A is the material with natural-optical rotation effect, and the specific rotation rate is a, and then concentration is C
AThe angle of rotation that produces of A substance solution can be expressed as: θ
A1=ac
AD, d are the distances that light passes through in solution
[2], as seen can be by measuring solution angle of rotation θ
A1Size obtain the concentration C of solution
A
If the Verdet constant of A substance solution and B substance solution is respectively V
AAnd V
B, then under the effect in magnetic field, faraday's rotation angle of two kinds of solution is respectively θ
A=V
ABd and θ
B=V
BBd, d are the distance that light passes through in solution, and B is a magnetic induction density
[4]Because the Verdet constant of solution becomes certain dull corresponding relation with its concentration, be generally V
Solution=u+kC, V are Verdet constant, and k is a scale-up factor, and u is a constant, and C is the concentration of solution
[1,3]For certain solution to be measured, the measurement that experimentizes of standard solution that can the configured in advance variable concentrations obtains this calibration relation formula by the match to experimental data.Because B and d can measure in faraday's formula, so measure the Verdet constant V that deflection angle theta can obtain solution in the actual detected, promptly known the concentration information of solution again according to the calibration relation between this solution Verdet constant and the concentration.
Pick-up unit of the present invention is as shown in Figure 1: the light that semiconductor laser 1 sends is linearly polarized light I through optoisolator 2 backs
0, be incident to film polarization beam splitter prism 3 after, be decomposed into the light I that the polarization direction is parallel to the p component of paper
01With light I perpendicular to the s component of paper
02, the angle that shakes thoroughly between direction and the p light components of optoisolator 2 is α, then I
01=I
0Cos
2α, I
02=I
0Sin
2α deposits solution to be measured in the modulator, establishing alternating magnetic field is B=B
0Sin ω t, linearly polarized light rotates through solution rear polarizer face to be measured, thereby has produced the light vibration component parallel with the direction of shaking thoroughly of analyzer, and the light of this component carries total rotary angle information and is received by photodetector (6).
The A material itself has the natural-optical rotation effect, and angle of rotation is θ
A1, B does not have the natural-optical rotation effect; If the total magnetic rotation angle of this solution is θ
AB, then polarized light is (θ through total optically-active angle behind the solution
A1+ θ
AB).
Wherein:
θ
A1＝a·c·d (1)
θ
AB＝(V
A+V
B)dB
0sinωt＝(θ
A0+θ
B0)sinωt＝(θ
A+θ
B) (2)
Under the situation of not considering various absorptions and surface reflection, the receiving light power of photodetector (6) is:
I＝I
01sin
2(θ
A1+θ
AB)＝I
01sin
2[θ
A1+(θ
A0+θ
B0)sinωt] (3)
If the enlargement factor of division amplifier (8) is m, then the relative detection light intensity of division amplifier output is:
I′＝m·(I/I
02)＝m·[I
01/I
02·sin
2(θ
A1+θ
AB)]＝m·cot
2α·sin
2[θ
A1+(θ
A0+θ
B0)sinωt] (4)
Wherein, definition s=mcot
2α is a signal amplification factor in this detection system; Relative detection light intensity in the formula (4) is gathered and curve plotting by MICROCOMPUTER PROCESSING and display unit 9.
For a particular system, m and a are known.Since be ac modulation, therefore, no matter θ
A1With (θ
A+ θ
B) direction consistent still be opposite, the largest light intensity point is always arranged as can be known corresponding to (θ by (4) formula
A1+ θ
A+ θ
B), therefore reading the largest light intensity value by MICROCOMPUTER PROCESSING and display unit 9 can obtain (θ
A1+ θ
A+ θ
B) size.And when the modulating signal phase angle was 0, promptly during sin ω t=0, the light intensity value that obtains was corresponding to θ
A1Thereby, can obtain θ
A1Size, thereby determine the concentration C of A solute
A, can determine the magnetic rotation angle θ of A material again by the concentration of A material
A, draw θ at last
BSize, thereby obtain the concentration of B material.So far, the concentration of A, two kinds of solutes of B is promptly detected respectively.
Specific embodiment 1:
The present invention proposes a kind of two kinds of solute transparent mixed solution concentration detection apparatus.Device is by semiconductor laser
1, polarization relationship type optoisolator 2, film polarization beam splitter prism 3, sample cell and magneto-optic modulator 4, polaroid 5, first photodetector 6, second photodetector 7, division amplifier 8 and MICROCOMPUTER PROCESSING and display unit 9 are formed.
The A material itself has the natural-optical rotation effect, and angle of rotation is θ
A1, B does not have the natural-optical rotation effect; Two kinds of solutes all obviously have faraday's magnetic rotation effect and the magnetic rotation direction is identical, and then polarized light is (θ through total optically-active angle behind the solution
A1+ θ
A+ θ
B).
Wherein: θ
A1=acd, θ
A=V
ADB
0Sin ω t, θ
B=V
BDB
0Sin ω t,
Under the situation of not considering various absorptions and surface reflection, the receiving light power of first photodetector 6 is:
I=I
01Sin
2(θ
A1+ θ
A+ θ
B), the enlargement factor of establishing division amplifier 8 is m, then the relative detection light intensity of division amplifier output is: I '=m (I/I
02)=mcot
2α sin
2(θ
A1+ θ
A+ θ
B) (5)
For a particular system, m and a are known.Since be ac modulation, therefore, no matter θ
A1With (θ
A+ θ
B) direction consistent still be opposite, the largest light intensity point is always arranged as can be known corresponding to (θ by (5) formula
A1+ θ
A+ θ
B), therefore reading the largest light intensity value by MICROCOMPUTER PROCESSING and display unit 9 can obtain (θ
A1+ θ
A+ θ
B) size.And when the modulating signal phase angle was 0, promptly during sin ω t=0, the light intensity value that obtains was corresponding to θ
A1Thereby, can obtain θ
A1Size, thereby determine the concentration C of A solute
A, can determine the magnetic rotation angle θ of A material again by the concentration of A material
A, draw θ at last
BSize, thereby obtain the concentration of B material.So far, the concentration of A, two kinds of solutes of B is promptly detected respectively.
Specific embodiment 2:
The present invention proposes a kind of two kinds of solute transparent mixed solution concentration detection apparatus.Device is made up of semiconductor laser 1, polarization relationship type optoisolator 2, film polarization beam splitter prism 3, sample cell and magneto-optic modulator 4, polaroid 5, first photodetector 6, second photodetector 7, division amplifier 8 and MICROCOMPUTER PROCESSING and display unit 9.
The A material itself has the natural-optical rotation effect, and angle of rotation is θ
A1, B does not have the natural-optical rotation effect and obviously has faraday's magnetic rotation effect, and then polarized light is (θ through total optically-active angle behind the solution
A1+ θ
B).
Wherein: θ
A1=acd, θ
B=V
BDB
0Sin ω t,
Under the situation of not considering various absorptions and surface reflection, the receiving light power of first photodetector 6 is: I=I
01Sin
2(θ
A1+ θ
B), the enlargement factor of establishing division amplifier 8 is m, then the relative detection light intensity of division amplifier output is: I '=m (I/I
02)=mcot
2α sin
2(θ
A1+ θ
B) (6)
For a particular system, m and a are known.Since be ac modulation, therefore, no matter θ
A1With θ
BDirection consistent still be opposite, the largest light intensity point is always arranged as can be known corresponding to (θ by (6) formula
A1+ θ
B), therefore reading the largest light intensity value by MICROCOMPUTER PROCESSING and display unit 9 can obtain (θ
A1+ θ
B) size.And when the modulating signal phase angle was 0, promptly during sin ω t=0, the light intensity value that obtains was corresponding to θ
A1Thereby, can obtain θ
A1Size, thereby determine the concentration C of A solute
A, then draw θ
BSize, thereby obtain the concentration of B material.So far, the concentration of A, two kinds of solutes of B is promptly detected respectively.
Specific embodiment 3:
The present invention proposes a kind of two kinds of solute transparent mixed solution concentration detection apparatus.Device is made up of semiconductor laser 1, polarization relationship type optoisolator 2, film polarization beam splitter prism 3, sample cell and magneto-optic modulator 4, polaroid 5, first photodetector 6, second photodetector 7, division amplifier 8 and MICROCOMPUTER PROCESSING and display unit 9.
The A material itself has the natural-optical rotation effect, and angle of rotation is θ
A1, the B material does not have the natural-optical rotation effect; Two kinds of solutes all obviously have faraday's magnetic rotation effect and the magnetic rotation direction is opposite, and then polarized light is (θ through total optically-active angle behind the solution
A1+ | θ
A-θ
B|).
Wherein: θ
A1=acd, θ
A=V
ADB
0Sin ω t, θ
B=V
BDB
0Sin ω t,
Under the situation of not considering various absorptions and surface reflection, the receiving light power of photodetector 6 is: I=I
01Sin
2(θ
A1+ | θ
A-θ
B|), the enlargement factor of establishing division amplifier 8 is m, then the relative detection light intensity of division amplifier output is: I '=m (I/I
02)=mcot
2α sin
2(θ
A1+ | θ
A-θ
B|) (7)
For a particular system, m and a are known.Since be ac modulation, therefore, no matter θ
A1With | θ
A-θ
B| direction consistent still be opposite, the largest light intensity point is always arranged as can be known corresponding to (θ by (7) formula
A1+ | θ
A-θ
B|), therefore reading the largest light intensity value by MICROCOMPUTER PROCESSING and display unit 9 can obtain (θ
A1+ | θ
A-θ
B|) size.And when the modulating signal phase angle was 0, promptly during sin ω t=0, the light intensity value that obtains was corresponding to θ
A1, can determine the concentration C of A solute this moment
A, know by calculating simultaneously | θ
A-θ
B| size.Because θ
AWith θ
BAnti-phase, for absolute value sign is removed so that calculate θ
B, remove magnetic field this moment, and rotatory polarization sheet 5 is to the extinction position, and then apply D.C. magnetic field, because the magnetic rotation of A, B material is reverse and the magnetic rotation direction can be known in advance, therefore rotatory polarization sheet 5 can be judged θ to the extinction position by the moving direction of twice extinction position, front and back again
AWith θ
BRelative size, thereby absolute value sign can be removed.Can determine the magnetic rotation angle θ of A material by the concentration of A material
A, draw θ at last
BSize, thereby obtain the concentration of B material.So far, the concentration of A, two kinds of solutes of B is promptly detected respectively.
Claims (3)
1. one kind two kinds solute transparent mixed solution concentration detection apparatus is characterized in that this pick-up unit comprises semiconductor laser (1), polarization relative photo isolator (2), film polarization beam splitter prism (3), sample cell and magneto-optic modulator (4), polaroid (5), first photodetector (6), second photodetector (7), division amplifier (8) and MICROCOMPUTER PROCESSING and display unit (9);
The laser output of semiconductor laser (1) is sent into the input end of sample cell and magneto-optic modulator (4) and the input end of second photodetector (7) by polarization relative photo isolator (2) film polarization beam splitter prism (3), the output terminal of sample cell and magneto-optic modulator (4) is sent into the input end of first photodetector (6) by polaroid (5), the input end of the output termination division amplifier (8) of first photodetector (6) and second photodetector (7), the output termination MICROCOMPUTER PROCESSING of division amplifier (8) and display unit (9).
2. two kinds of solute transparent mixed solution concentration detection apparatus according to claim 1 is characterized in that in sample cell and the magneto-optic modulator (4), and sample cell adopts transparent column shape glass tube to make, and sample cell is provided with inlet and liquid outlet; Magneto-optic modulator adopts solenoid, thereby produces alternating magnetic field with alternating current for solenoid link; Sample cell places solenoid central axis position, and sample cell and solenoidal axis are parallel with incident ray.
3. two kinds of solute transparent mixed solution concentration detection apparatus according to claim 1 is characterized in that first photodetector (6), second photodetector (7) adopt model, photodetector that performance is all identical.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101995379A (en) * | 2010-10-12 | 2011-03-30 | 南京邮电大学 | Magneto-optic detector for transparent solution concentration |
| TWI596459B (en) * | 2012-11-16 | 2017-08-21 | 恩特葛瑞斯 捷特隆解決方案公司 | Methods, systems, and apparatuses for controlling substance mixing concentration |
| CN108919844A (en) * | 2018-05-15 | 2018-11-30 | 电子科技大学 | A kind of real-time solution concentration automatic control system of chemical reaction rate |
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| 《光学学报》 20090831 梁忠诚等 磁致旋光增强效应与微量样品旋光检测方法 2221-2224 1-3 第29卷, 第8期 2 * |
| 《光电子·激光》 20100731 沈骁等 基于磁光调制的二元溶液浓度检测技术研究 1044-1047 1-3 第21卷, 第7期 2 * |
| 《激光杂志》 20060228 王洪等 基于光学旋光法的血糖浓度测量 80-81，83 1-3 第27卷, 第1期 2 * |
| 《辽宁师范大学学报（自然科学版）》 19960930 李成仁等 用法拉第效应测液体浓度 259-262 1-3 第19卷, 第3期 2 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995379A (en) * | 2010-10-12 | 2011-03-30 | 南京邮电大学 | Magneto-optic detector for transparent solution concentration |
| TWI596459B (en) * | 2012-11-16 | 2017-08-21 | 恩特葛瑞斯 捷特隆解決方案公司 | Methods, systems, and apparatuses for controlling substance mixing concentration |
| US10081000B2 (en) | 2012-11-16 | 2018-09-25 | Entegris, Inc. | Methods, systems, and apparatuses for controlling substance mixing concentration |
| CN108919844A (en) * | 2018-05-15 | 2018-11-30 | 电子科技大学 | A kind of real-time solution concentration automatic control system of chemical reaction rate |
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| Publication number | Publication date |
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| CN101852721B (en) | 2012-06-27 |
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