CN112525788A - Probe for detecting particle concentration and particle size in high-concentration particle solution - Google Patents
Probe for detecting particle concentration and particle size in high-concentration particle solution Download PDFInfo
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- CN112525788A CN112525788A CN202011385674.XA CN202011385674A CN112525788A CN 112525788 A CN112525788 A CN 112525788A CN 202011385674 A CN202011385674 A CN 202011385674A CN 112525788 A CN112525788 A CN 112525788A
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- 239000002245 particle Substances 0.000 title claims abstract description 83
- 239000000523 sample Substances 0.000 title claims abstract description 49
- 238000005070 sampling Methods 0.000 claims abstract description 84
- 239000000243 solution Substances 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000005086 pumping Methods 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 230000008595 infiltration Effects 0.000 claims abstract description 4
- 238000001764 infiltration Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 17
- 238000000034 method Methods 0.000 description 16
- 239000011259 mixed solution Substances 0.000 description 8
- 238000003113 dilution method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000012488 sample solution Substances 0.000 description 4
- 239000012895 dilution Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 244000007853 Sarothamnus scoparius Species 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N2015/0675—Comparing suspension before/after dilution
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N2015/0687—Investigating concentration of particle suspensions in solutions, e.g. non volatile residue
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention relates to the technical field of particle detection, in particular to a probe for detecting particle concentration and particle size in a high-concentration particle solution. Including container one, container two, pump machine and probe, built-in diluted solution in the container one, built-in high concentration solution in the container two, the submergence has the probe in the container two, the probe includes the sampling mechanism based on the coulter principle, and a sampling tube is equipped with to this sampling mechanism's outside cover, the sampling tube keeps apart sampling mechanism and high concentration solution, and this sampling tube adopts macromolecular material to make, and under inside negative pressure state, high concentration solution can be by the sampling mechanism of sampling tube infiltration probe, the sampling tube inside of probe still includes the water injection pipe, water pumping pipe one and water pumping pipe two, and wherein the water injection pipe switches on through pump machine and container one, and water pumping pipe one and water pumping pipe two are led to with the side of drawing water of outside pump machine respectively.
Description
Technical Field
The invention relates to the technical field of particle detection, in particular to a probe for detecting particle concentration and particle size in a high-concentration particle solution.
Background
Coulter, a technique developed in late 1940 for approximate counting and measurement of particles uniformly distributed in an electrolyte, and the coulter principle, also known as the Electrical Sensitive Zone (ESZ) method, is a reference for many national and international standards, and this analytical method, i.e., an analytical instrument based on the coulter principle, is often used as a reference for evaluating measurement techniques for other instrument for measuring particles.
In the ESZ method, the suspension is passed through a small cylindrical open (i.e., small hole) aperture with separate electrodes on either side, and current flows between them. Although the current is of small amplitude (typically 1mA), the impedance created by the confinement of the separate electrodes creates a considerable current density in the pores, and as each particle passes through a pore (the sensor strip), it displaces a volume of conductive fluid equivalent to its own volume, momentarily increasing the resistance of the pore.
The change in resistance produces a small but proportional change in voltage, which is translated by the amplifier into a sufficient voltage pulse to enable accurate measurement. The coulter principle holds that the amplitude of the pulse is directly proportional to the volume of the particle from which the pulse is generated. By measuring the height of these pulses in voltage units, a particle size distribution map can be obtained and displayed. Also, if a known amount of suspension is drawn through an orifice using a quantifier, the statistics of the number of pulses reflect the concentration of particles per unit volume in the suspension.
The ESZ method is used for detecting a low-concentration particle solution, and when a high-concentration particle solution is detected, a large number of particles can pass through small holes at the same time, so that the small holes are blocked, and the measurement accuracy is influenced. To address this hole blockage, researchers have attempted to develop inspection probe configurations to improve this situation. At present, the principle is not used for measuring the concentration and the particle size at home, and Beckmann Coulter company created by Wallace H.Coulter and brothers of Walsh R.Coulter who proposes the Coulter principle at abroad has a method for solving the problem of small hole blockage. The method of injecting electrolyte solution into the test tube is adopted to reduce the concentration of sample solution and particles, thereby reducing the phenomenon of hole blockage.
The existing methods for solving the problem of pore blocking phenomenon in measurement in high-concentration particle solution mostly have one or more of the following defects: 1. the cost is high 2, the concentration of the solution to be detected is influenced, the detection result is inaccurate 3, the problem of hole blockage cannot be completely solved 4, the structure is complex, and the method is difficult to apply to a small space environment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a device for detecting the concentration and the particle diameter of particles in a high-concentration particle solution, which adopts an integrated structure and solves the problems that the existing equipment has a complex structure, occupies a large space and is inaccurate to detect the concentration and the particle diameter of the particles in the high-concentration particle solution by a dilution method.
The technical scheme adopted by the invention is as follows:
a probe for detecting particle concentration and particle size in a high concentration particle solution, characterized by: including container one, container two, pump machine and probe, built-in diluted solution in the container one, built-in high concentration solution in the container two, the submergence has the probe in the container two, the probe includes the sampling mechanism based on the coulter principle, and a sampling tube is equipped with to this sampling mechanism's outside cover, the sampling tube keeps apart sampling mechanism and high concentration solution, and this sampling tube adopts macromolecular material to make, and under inside negative pressure state, high concentration solution can be by the sampling mechanism of sampling tube infiltration probe, the sampling tube inside of probe still includes the water injection pipe, water pumping pipe one and water pumping pipe two, and wherein the water injection pipe switches on through pump machine and container one, and water pumping pipe one and water pumping pipe two are led to with the side of drawing water of outside pump machine respectively.
Furthermore, the sampling mechanism comprises a flange, a small hole pipe is arranged at the axial end part of the flange facing the sampling pipe, an inner electrode is arranged in the small hole pipe, an outer electrode is oppositely arranged outside the small hole pipe, and a small hole for leading in solvent particles is formed in the side wall of the lower end of the small hole pipe.
Furthermore, a stirrer is arranged below the probe, and a stirrer of the stirrer is positioned in the sampling pipe.
Furthermore, the second pumping pipe is communicated with the upper end part of the small-hole pipe.
Furthermore, the flange is embedded with a rubber plug towards the inner edge of the end part of the sampling tube, a plurality of mounting holes are uniformly formed in the rubber plug at intervals and are respectively used for penetrating a water injection tube, a water pumping tube I, a water pumping tube II, an inner electrode, an outer electrode, a small-hole tube and related components.
Furthermore, the axial end part of the flange provided with the small hole pipe and a lower sheath are integrally installed, and the other end part of the flange is integrally installed with an upper sheath.
Further, go up the sheath suit and be used for leading and fixing the tip of each pipeline and the cable of inside and outside electrode outside flange and rubber buffer.
Furthermore, the lower sheath is sleeved outside the sampling tube, and the position of the lower sheath, which is located on the radial side of the small-bore tube, is hollowed out.
The invention has the advantages and positive effects that:
according to the invention, a set of complete detection system is formed by matching a container I, a container II, a pump and a probe, wherein the container II is used for placing a high-concentration solution to be detected, the container I is used for placing a low-concentration solution with a known concentration, the pump is used for pumping the corresponding solution, and the probe is used for detecting the concentration of the mixed solution.
According to the invention, the flow speed and the flow of the pumped solution are adjusted by the pump speeds of different pumps, when the first pumping pipe works, air in the sampling pipe is pumped away, and high-concentration particle solution is squeezed by atmospheric pressure to enter the sampling pipe through the small hole of the sampling pipe. Meanwhile, the water injection pipe extracts the diluted solution, and the diluted solution is injected into the sampling pipe to be mixed with the high-concentration particle solution carrying a large number of particles, so that the purpose of dilution is achieved. In the dilution process, the stirrer continuously stirs the fully mixed solution, so that the particle precipitation is prevented from influencing the precision of the detection result. The mixed solution passes through the small holes of the small hole pipe to cause the change of the resistance, so that the change is detected, and the particle distribution condition in the original sample solution can be calculated by calculating the ratio of the water injection quantity of the water injection pipe to the water inflow quantity of the high-concentration particle solution in the sampling pipe. By matching the detection system and the method, the accurate detection process can be realized for the high-concentration solution on the premise of ensuring the normal operation of the system.
In the invention, a water injection pipe, a water pumping pipe, an inner electrode, an outer electrode (a positive platinum wire electrode and a negative platinum wire electrode), a small hole pipe and a stirrer are arranged in a sampling pipe, the upper part of the small hole pipe is closed, and the lower part of the small hole pipe is externally connected with a diluted solution to form a detection probe. The pumping speed of the pump connected with the pumping pipe 1 and the water injection pipe can be adjusted quantitatively according to the acquisition requirement.
In the invention, the upper shield, the flange, the rubber broom, the lower sheath, the sampling tube and the small hole tube are matched to form a novel integrated sampling probe, and the integrated sampling probe has a reasonable structure and compact layout and is suitable for being used in a small-space application environment. The upper shield isolates one axial end of the flange, and guides and seals the inner electrode, the cable of the outer electrode and the leading-in part of the liquid suction pipe. The lower shield covers the sampling tube and the sampling mechanism at the inner side to prevent the sampling tube and the sampling mechanism from colliding with an external structure to realize effective protection.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is an exploded view of a part of the probe portion of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
A probe for detecting particle concentration and particle size in a high concentration particle solution, characterized by: including container one 9, container two 8, pump 11 and probe, built-in dilute solution in the container one, built-in high concentration solution in the container two, the submergence has the probe in the container two, the probe includes the sampling mechanism based on the coulter principle, and a sampling tube 5 is equipped with to this sampling mechanism's outside cover, the sampling tube is kept apart sampling mechanism and high concentration solution, and this sampling tube adopts macromolecular material to make, and under inside negative pressure state, high concentration solution can be by the sampling mechanism of sampling tube infiltration probe, the inside water injection pipe 10 that still includes of sampling tube of probe, water pumping pipe one 12 and water pumping pipe two 1, wherein the water injection pipe switches on through pump and container one, and water pumping pipe one and water pumping pipe two are led to with the side of drawing water of outside pump respectively.
In this embodiment, the sampling mechanism includes a flange 15, a small hole tube 4 is installed at the axial end of the flange facing the sampling tube, an inner electrode 3 is installed inside the small hole tube, an outer electrode 2 is installed opposite to the outside of the small hole tube, and a small hole for containing particles to be introduced is formed in the side wall of the lower end of the small hole tube.
In this embodiment, a stirrer 7 is installed below the probe, and a stirrer 6 of the stirrer is located inside the sampling pipe.
In this embodiment, the second pumping pipe is communicated with the upper end of the small hole pipe.
In this embodiment, a rubber plug is embedded in the inner edge of the end portion of the flange, which faces away from the sampling tube, and a plurality of mounting holes are uniformly formed in the rubber plug at intervals and are respectively used for mounting a water injection tube, a water pumping tube I, a water pumping tube II, an inner electrode, an outer electrode, a small-hole tube and related components.
In this embodiment, the flange is integrally attached to the lower sheath 16 at the axial end to which the small-bore pipe is attached, and integrally attached to the upper sheath 13 at the other end.
In this embodiment, the upper sheath is sleeved outside the flange and the rubber plug 14 and is used for guiding and fixing the end of each pipeline and the cables of the inner and outer electrodes.
In this embodiment, the lower sheath is sleeved outside the sampling tube, and the position of the lower sheath located on the radial side of the small-bore tube is hollowed out. The upper sheath can be immersed in the high-concentration solution during the detection process, or can be detached to only partially immerse the sampling tube.
The working process of the invention is as follows:
when the sampling tube is used, the flow speed and the flow rate of the extracted solution are adjusted through the pump speeds of different pumps, when the water pumping tube works, air in the sampling tube is pumped away, and high-concentration particle solution is squeezed by atmospheric pressure to enter the sampling tube through the small hole of the sampling tube. Meanwhile, the water injection pipe extracts the diluted solution, and the diluted solution is injected into the sampling pipe to be mixed with the high-concentration particle solution carrying a large number of particles, so that the purpose of dilution is achieved. In the dilution process, the stirrer continuously stirs the fully mixed solution, so that the particle precipitation is prevented from influencing the precision of the detection result. The mixed solution passes through the small holes of the small hole pipe to cause the change of the resistance, so that the change is detected, and the particle distribution condition in the original sample solution can be calculated by calculating the ratio of the water injection quantity of the water injection pipe to the water inflow quantity of the high-concentration particle solution in the sampling pipe. By matching the detection system and the method, the accurate detection process can be realized for the high-concentration solution on the premise of ensuring the normal operation of the system.
According to the invention, a set of complete detection system is formed by matching a container I, a container II, a pump and a probe, wherein the container II is used for placing a high-concentration solution to be detected, the container I is used for placing a low-concentration solution with a known concentration, the pump is used for pumping the corresponding solution, and the probe is used for detecting the concentration of the mixed solution.
According to the invention, the flow speed and the flow of the pumped solution are adjusted by the pump speeds of different pumps, when the first pumping pipe works, air in the sampling pipe is pumped away, and high-concentration particle solution is squeezed by atmospheric pressure to enter the sampling pipe through the small hole of the sampling pipe. Meanwhile, the water injection pipe extracts the diluted solution, and the diluted solution is injected into the sampling pipe to be mixed with the high-concentration particle solution carrying a large number of particles, so that the purpose of dilution is achieved. In the dilution process, the stirrer continuously stirs the fully mixed solution, so that the particle precipitation is prevented from influencing the precision of the detection result. The mixed solution passes through the small holes of the small hole pipe to cause the change of the resistance, so that the change is detected, and the particle distribution condition in the original sample solution can be calculated by calculating the ratio of the water injection quantity of the water injection pipe to the water inflow quantity of the high-concentration particle solution in the sampling pipe. By matching the detection system and the method, the accurate detection process can be realized for the high-concentration solution on the premise of ensuring the normal operation of the system.
In the invention, a water injection pipe, a water pumping pipe, an inner electrode, an outer electrode (a positive platinum wire electrode and a negative platinum wire electrode), a small hole pipe and a stirrer are arranged in a sampling pipe, the upper part of the small hole pipe is closed, and the lower part of the small hole pipe is externally connected with a diluted solution to form a detection probe. The pumping speed of the pump connected with the pumping pipe 1 and the water injection pipe can be adjusted quantitatively according to the acquisition requirement.
In the invention, the upper shield, the flange, the rubber broom, the lower sheath, the sampling tube and the small hole tube are matched to form a novel integrated sampling probe, and the integrated sampling probe has a reasonable structure and compact layout and is suitable for being used in a small-space application environment. The upper shield isolates one axial end of the flange, and guides and seals the inner electrode, the cable of the outer electrode and the leading-in part of the liquid suction pipe. The lower shield covers the sampling tube and the sampling mechanism at the inner side to prevent the sampling tube and the sampling mechanism from colliding with an external structure to realize effective protection.
Claims (8)
1. A probe for detecting particle concentration and particle size in a high concentration particle solution, characterized by: including container one, container two, pump machine and probe, built-in diluted solution in the container one, built-in high concentration solution in the container two, the submergence has the probe in the container two, the probe includes the sampling mechanism based on the coulter principle, and a sampling tube is equipped with to this sampling mechanism's outside cover, the sampling tube keeps apart sampling mechanism and high concentration solution, and this sampling tube adopts macromolecular material to make, and under inside negative pressure state, high concentration solution can be by the sampling mechanism of sampling tube infiltration probe, the sampling tube inside of probe still includes the water injection pipe, water pumping pipe one and water pumping pipe two, and wherein the water injection pipe switches on through pump machine and container one, and water pumping pipe one and water pumping pipe two are led to with the side of drawing water of outside pump machine respectively.
2. The probe for detecting particle concentration and particle size in a high concentration particle solution according to claim 1, wherein: the sampling mechanism comprises a flange, a small hole pipe is arranged at the axial end part of the flange facing the sampling pipe, an inner electrode is arranged in the small hole pipe, an outer electrode is oppositely arranged at the outer part of the small hole pipe, and a small hole for accommodating particles to be led in is formed in the side wall of the lower end of the small hole pipe.
3. The probe for detecting particle concentration and particle size in a high concentration particle solution according to claim 1, wherein: and a stirrer is arranged below the probe, and a stirrer of the stirrer is positioned in the sampling pipe.
4. The probe for detecting particle concentration and particle size in a high concentration particle solution according to claim 1, wherein: and the second pumping pipe is communicated with the upper end part of the small hole pipe.
5. The probe for detecting particle concentration and particle size in a high concentration particle solution according to claim 1, wherein: the flange is embedded with a rubber plug at the inner edge of the end part of the sampling tube back to the flange, and a plurality of mounting holes are uniformly formed in the rubber plug at intervals and are respectively used for penetrating and installing a water injection tube, a water pumping tube I, a water pumping tube II, an inner electrode, an outer electrode, a small hole tube and related components.
6. The probe for detecting particle concentration and particle diameter in a high concentration particle solution according to any one of claims 1 to 5, wherein: the axial end part of the flange provided with the small-hole pipe and the lower sheath are integrally installed, and the other end part of the flange is integrally installed with the upper sheath.
7. The probe for detecting particle concentration and particle size in a high concentration particle solution according to claim 6, wherein: go up the sheath suit and be used for leading and fixing the tip of each pipeline and the cable of inside and outside electrode outside flange and rubber buffer.
8. The probe for detecting particle concentration and particle size in a high concentration particle solution according to claim 6, wherein: the lower sheath is sleeved outside the sampling tube, and the position of the lower sheath, which is located on the radial side of the small hole tube, is hollowed out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011385674.XA CN112525788A (en) | 2020-12-01 | 2020-12-01 | Probe for detecting particle concentration and particle size in high-concentration particle solution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011385674.XA CN112525788A (en) | 2020-12-01 | 2020-12-01 | Probe for detecting particle concentration and particle size in high-concentration particle solution |
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| CN112525788A true CN112525788A (en) | 2021-03-19 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979669A (en) * | 1973-09-26 | 1976-09-07 | Coulter Electronics, Inc. | Particle analyzing system |
| GB1471527A (en) * | 1973-06-14 | 1977-04-27 | Coulter Electronics Ld | On-line system for monitoring particles in fluids |
| US20080314130A1 (en) * | 2005-09-22 | 2008-12-25 | Chempaq A/S | Detection and Subsequent Removal of an Aperture Blockage |
| JP2009128048A (en) * | 2007-11-20 | 2009-06-11 | Yamaguchi Univ | Particle analyzer and method based on coulter theory and on simultaneous measurement of light scattering |
| CN101957301A (en) * | 2010-08-18 | 2011-01-26 | 上海化工研究院 | Dissolving-out analog device and method for measuring sustained-release fertilizer nutrients |
| CN104007239A (en) * | 2014-06-12 | 2014-08-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Automatic online measurement system and method for high-concentration ions |
| CN104990848A (en) * | 2015-07-14 | 2015-10-21 | 中国科学院大学 | Device and method for detecting micro-particles compatible with process |
-
2020
- 2020-12-01 CN CN202011385674.XA patent/CN112525788A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1471527A (en) * | 1973-06-14 | 1977-04-27 | Coulter Electronics Ld | On-line system for monitoring particles in fluids |
| US3979669A (en) * | 1973-09-26 | 1976-09-07 | Coulter Electronics, Inc. | Particle analyzing system |
| US20080314130A1 (en) * | 2005-09-22 | 2008-12-25 | Chempaq A/S | Detection and Subsequent Removal of an Aperture Blockage |
| JP2009128048A (en) * | 2007-11-20 | 2009-06-11 | Yamaguchi Univ | Particle analyzer and method based on coulter theory and on simultaneous measurement of light scattering |
| CN101957301A (en) * | 2010-08-18 | 2011-01-26 | 上海化工研究院 | Dissolving-out analog device and method for measuring sustained-release fertilizer nutrients |
| CN104007239A (en) * | 2014-06-12 | 2014-08-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Automatic online measurement system and method for high-concentration ions |
| CN104990848A (en) * | 2015-07-14 | 2015-10-21 | 中国科学院大学 | Device and method for detecting micro-particles compatible with process |
Non-Patent Citations (1)
| Title |
|---|
| 李勇 等: "微颗粒实时在线监测仪在固液体系测量中的应用", 《化工学报》 * |
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Application publication date: 20210319 |
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