WO2006080211A1 - 超純水中の微粒子数測定方法、微粒子数測定用ろ過装置、その製造方法及びその装置に用いる中空糸膜ユニット - Google Patents
超純水中の微粒子数測定方法、微粒子数測定用ろ過装置、その製造方法及びその装置に用いる中空糸膜ユニット Download PDFInfo
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- WO2006080211A1 WO2006080211A1 PCT/JP2006/300586 JP2006300586W WO2006080211A1 WO 2006080211 A1 WO2006080211 A1 WO 2006080211A1 JP 2006300586 W JP2006300586 W JP 2006300586W WO 2006080211 A1 WO2006080211 A1 WO 2006080211A1
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- hollow fiber
- fine particles
- fiber membrane
- ultrapure water
- water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
-
- 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
- G01N15/0272—Investigating particle size or size distribution with screening; with classification by filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/024—Hollow fibre modules with a single potted end
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
- G01N1/2035—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials by deviating part of a fluid stream, e.g. by drawing-off or tapping
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/06—External membrane module supporting or fixing means
-
- 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
- G01N15/10—Investigating individual particles
- G01N2015/1024—Counting particles by non-optical means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49007—Indicating transducer
Definitions
- the present invention relates to a method for measuring the number of fine particles contained in ultra pure water, a filtration device for measuring the number of fine particles, a method for producing the same, and a hollow fiber membrane unit used in the device.
- a sampling pipe is branched from a pipe through which the outlet water of the ultrapure water production apparatus flows, and a part of ultrapure water is finely divided.
- this membrane surface is photographed with a scanning electron microscope, etc., and image processed to determine the number of fine particles.
- a method of counting has been proposed (see, for example, Patent Document 1).
- the filtration membrane has a diameter of about 25 mm, so it is practically difficult to directly observe the entire membrane surface with a scanning electron microscope or the like. Therefore, the field of view is usually moved to actually observe around 0.001 to 0.1% of the effective filtration area, and the number of fine particles in the ultrapure water (number of captured particles) captured by filtration over the entire effective membrane area is calculated. Calculated.
- the required water quality may be high, for example, 1 particle or less with a particle size of 0.05 ⁇ or less than 10 particles with a particle size of 0.0 3 / im per ml of ultrapure water. is there.
- the conventional method for measuring the number of fine particles has the following problems.
- a flat membrane is used as a filtration membrane, the membrane surface is exposed.
- Planck particles (contaminated fine particles) that are not derived from water are inevitably attached and easily deposited.
- the object to be measured is a particle having a particle size of 0.05 / m or more, 10 5 to 10 6 particles / cm 2 and a particle size of 0.03 /
- 10 5 to 10 7 particles / cm 2 of plank particles (contaminated fine particles) adhere to the flat film and are scattered.
- the filtration rate of a flat membrane filter (MF membrane) with a pore size of 0.1 ⁇ m is 4.0 ml / min (25 ° C, 0.75 kgfZcm 2 ), while the pore size is 0.03; ⁇
- MF membrane flat membrane filter
- it is 0.1 ml / min (25 ° C, 0.775 kgf / cm 2), and the filtration rate is greatly reduced.
- a filtration device that uses a centrifugal force as a pressurizing means to shorten the filtration time is commercially available.
- a high rotational centrifugal force S with a standard rotation speed of 12, OOOrpm is generated, so that the device itself is expensive and complicated.
- the number of plank particles (contaminated fine particles) adhering to the membrane surface also varies, the number of plank particles (contaminated fine particles) in the same production lot as the filtration membrane used for sampling is measured and filtered. It was necessary to calculate the average value and standard deviation of the number of Planck particles (contaminated fine particles) in the membrane.
- Non-Patent Document 2 Semiconductor Fundamental Technology Study Group, 2012 Committee, “UCS12—Development of Semiconductor Industry and Achievements of UCS12” Realize, Inc., September 30, 2000, 1, 190—1, 198 pages
- Patent Document 1 Japanese Patent Publication No. 5 9-8 3 0 3 6
- the object of the present invention is to solve these problems.
- the measurable particle size can be minimized, the analysis accuracy can be improved, the filtration time can be shortened and simplified.
- An object of the present invention is to provide a fine particle number measurement method, a fine particle number measurement filtration device, a production method thereof, and a hollow fiber membrane unit used in the device. Means for solving the problem
- the present inventors have determined that a hollow having at least an inner surface capable of capturing finer fine particles when measuring the number of fine particles in ultrapure water. It has been found that by using a thread membrane, the measurable particle size can be minimized, the analysis accuracy can be improved, the filtration time can be shortened and simplified, and the present invention has been made.
- the method for measuring the number of fine particles in ultrapure water uses ultra-pure water with a hollow fiber membrane having at least an inner surface having a skin layer capable of capturing fine particles in ultrapure water.
- the method includes a step of internal pressure filtration, a step of exposing the inner surface of the hollow fiber membrane, and a step of measuring the number of fine particles on the exposed inner surface.
- a hollow fiber membrane having a skin layer capable of capturing fine particles in ultrapure water on the inner surface is sealed.
- a drainage outer cylinder connected inside and connected to the other side of the fixing member with an opening of the hollow fiber membrane connected thereto, and supplied with ultrapure water supplied from the water supply port and the water supply port
- the filtration device for measuring the number of fine particles in ultrapure water comprises A hollow fiber membrane in which at least one end of a hollow fiber membrane having a skin layer capable of capturing fine particles on the inner surface is sealed, and a fixing member is fixed to the outer periphery between the sealing portion and the opening portion via a resin mold portion A yarn membrane unit is provided.
- the manufacturing method of the filtration device for measuring the number of fine particles in ultrapure water includes both ends of a hollow fiber membrane having at least inner skin layers capable of capturing fine particles in ultrapure water. Sealing and fixing a fixing member with a resin mold on the outer periphery of the central part to form a hollow fiber membrane unit sealed at both ends, and a fixing member of the hollow fiber membrane unit sealed at both ends, And a step of reversely passing extruded water having antibacterial effect from the drain outlet side of the drain part outer cylinder and cutting one end of the hollow fiber membrane, and the cut And a step of connecting a water supply outer cylinder to one end of the hollow fiber membrane and filling the inside of the filtration device with water by reversely passing the extruded water having the antibacterial effect.
- the hollow fiber membrane unit according to the first aspect of the present invention is a hollow fiber membrane unit used in a filtration device for measuring fine particles in ultrapure water, and is a skin capable of capturing fine particles in ultrapure water.
- the hollow fiber membrane having at least an inner surface of the layer is sealed at both ends, and a fixing member is fixed to the outer periphery between the sealed portions at both ends via a resin mold portion.
- FIG. 1 is a cross-sectional view showing the configuration of a particulate matter measuring filtration device according to a first embodiment.
- FIG. 2 is a schematic diagram showing an example of a method for measuring the number of fine particles in ultrapure water using the fine particle measurement filtration device shown in FIG.
- FIG. 3 is a sectional view showing a configuration of a filtration device for measuring the number of fine particles in ultrapure water according to a second embodiment.
- FIG. 4 is a cross-sectional view showing a configuration of a hollow fiber membrane unit used in a filtration device for measuring the number of fine particles in ultrapure water according to a third embodiment.
- FIG. 5 is a schematic diagram showing a method for measuring the number of fine particles in ultrapure water according to a fourth embodiment.
- FIG. 6 is a cross-sectional view showing a configuration of a filtration device for measuring the number of fine particles according to a fifth embodiment.
- FIG. 7 is a schematic diagram showing an example of a method for measuring the number of fine particles in ultrapure water using the fine particle number measuring filtration device shown in FIG.
- FIG. 8 is a cross-sectional view showing a configuration of a filtration device for measuring the number of fine particles according to Example 6.
- FIG. 9 is a cross-sectional view showing a configuration of a particulate matter measuring filter according to Example 7.
- the hollow fiber membrane of the embodiment of the present invention has a skin layer on at least the inner surface.
- the skin layer has a structure that captures fine particles of the target particle size on the surface when filtered water is passed in order to measure the number of captured fine particles in a subsequent process.
- the hollow fiber membrane only needs to have a skin layer on at least the inner surface, but either internal pressure filtration or external pressure filtration can be used, it is structurally excellent in bursting strength and compression strength, and a high filtration pressure is set. It is preferable to have skin layers on both the inside and outside surfaces because it is possible and the filtration time can be greatly reduced.
- a hollow fiber membrane that does not have a skin layer and captures fine particles by depth filtration instead of screen filtration that captures fine particles on its surface makes it impossible to count the fine particles captured by observing the membrane surface. And cannot be used in the present invention.
- the skin layer can capture fine particles in ultrapure water having a particle size of 10 nm or more, preferably 5 nm or more.
- the pore diameter is not more than lOnm, preferably not more than 5 nm, if it is less than the particle diameter of the fine particles to be measured.
- Examples of the method for determining the particle size of the fine particles that can be captured include the following methods. First, a sample containing fine particles having a known particle diameter is supplied to a filtration device for measuring the number of fine particles. At this time, connect two filtration devices in series.
- One example is a method of observing and comparing the first-stage trapped particles and the second-stage trapped particles (the first-stage trapped particles) with a scanning electron microscope.
- a sample containing a known concentration of microparticles with a known particle size is supplied to a filtration device for measuring the number of microparticles, and the number of captured particles is measured using a scanning electron microscope (Scann ing Electron Microscope) can be used for observation and measurement.
- the hollow fiber membrane diameter is not particularly limited, but the smaller the effective membrane area the better in order to reduce the required filtration amount and shorten the filtration time, so the inner diameter is 0.8 mm or less, especially 0.5. It is preferably ⁇ 0.8 mm. Also, in order to improve workability during counting of trapped fine particles, the outer diameter is preferably 1. Omm or more, particularly 1.0 to 1.9 mm.
- the skin structure can be a symmetric membrane (homogeneous membrane) or an asymmetric membrane (heterogeneous membrane), whether it is a lobed asymmetric membrane made of the same material. A composite film made of different materials may be used.
- the material of the hollow fiber membrane is not particularly limited, and examples thereof include polyacrylonitrile, polysulfone, polyphenylenesulfone, polyphenylenesulfone sulfone, polyvinylidene fluoride, cellulose acetate, polyethylene, and polypropylene.
- Preferred examples include polyacrylonitrile, polysulfone, polyvinylidene fluoride, cellulose acetate, polyethylene, and polypropylene.
- the material which has property is more preferable. In order to shorten the filtration time, it is preferable to have a filtration capacity of 0.8 ml / min / cm 2 or more (0 ⁇ lMPa, 25 ° C).
- the hollow fiber membrane does not require a support due to its structure, and can be easily handled by modularizing, for example, when it is washed to remove blank particles (contaminated fine particles).
- the hollow fiber membrane since the hollow fiber membrane is hermetically sealed, the fine particles in the atmosphere do not have to be washed in a controlled clean nolem to prevent recontamination after washing.
- a flat membrane requires a support when it is used as thin as several to 10 / m in order to reduce filtration resistance, and handling is complicated.
- it must be cleaned in a clean room to prevent recontamination after cleaning.
- the hollow fiber membrane has a smaller number of blank particles (contaminated fine particles) attached to the inner surface than a conventional flat membrane MF membrane or the like. That is, since both the inner and outer surfaces of the flat film are exposed, fine particles in the atmosphere tend to adhere in the film forming process and the like, and the film surface tends to be contaminated.
- the hollow fiber membrane is exposed on the outer surface side but not on the inner surface side, so that it is possible to prevent fine particles from adhering in the film forming process or the like. For example, when the measurement object is fine particles having a particle size of 0.03 / m or more, blank particles (contaminated fine particles) of 10 5 to: 10 7 particles / cm 2 are adhered to the surface of the flat film.
- the number of blank particles adhering to the outer surface of the hollow fiber membrane having skin layers on both inner and outer surfaces is 10 5 to 10 6 particles / cm 2
- the number of blank particles adhering to the inner surface is 10 4 ⁇ : 10 5 / cm 2
- a filtration water volume of 1/100 is sufficient to ensure the same analysis accuracy as that of a flat membrane, and the filtration time can be greatly shortened. it can.
- the lower detection limit level can be lowered, and 10 ZL, quantitative analysis of fine particles can be performed.
- the filtration direction can be either external pressure filtration or internal pressure filtration.
- the hollow fiber membrane has an inner surface blank particle count (contaminated particulate count) as compared to the outer surface. Since there are few, it is preferable to use the internal pressure filtration which capture
- the filtration method can be either dead-end filtration (total filtration) or cross flow filtration. Dead-end filtration (total filtration) is preferred because it captures all fine particles in the supplied ultrapure water. ,.
- the sample water passed through the filtration membrane is limited to ultrapure water as long as it contains fine particles in the liquid and can count the number of fine particles captured by the hollow fiber membrane by filtration. It is not done.
- FIG. 1 is a cross-sectional view showing the configuration of the particulate matter measuring filter device according to the first embodiment.
- FIG. 2 is a schematic diagram showing an example of a method for measuring the number of fine particles in ultrapure water using the fine particle number measuring filtration device shown in FIG. [0028] As shown in Fig.
- the filtration device 1 for measuring the number of fine particles has a hollow fiber membrane 3 sealed at one end with an adhesive 2 such as an epoxy resin, and the adhesive 2 ( Fix the resin mold part), connect the water supply outer cylinder 6 to one side of the nipple 5 (open end side of the hollow fiber membrane 3), and the drainage part to the other side (sealing side of the hollow fiber membrane 3) It is manufactured by connecting the outer cylinder 4 (holder). A drainage joint 7 is connected to the drainage outer cylinder 4.
- This filtration device for measuring the number of fine particles 1 has a structure that allows water to pass in the direction opposite to the filtration direction (internal pressure filtration) (backwashable) in order to wash and remove the blank particles (contaminated fine particles) adhering to the membrane surface. Have.
- the hollow fiber membrane 3 may be backwashed in advance.
- blank particles (contaminated fine particles) adhering to the inner surface of the hollow fiber membrane can be washed and removed, further reducing the amount of water flow and shortening the filtration time. Is possible.
- Ultrapure water is a filtration device for measuring the number of microparticles in which a hollow fiber membrane is loaded from a supply pipe 21 through which outlet water of an ultrapure water production facility flows, via a sample introduction tube 22 provided with a sampling valve 23 1 To be passed through. Filter the particulates in ultrapure water at room temperature (25 ° C) to high temperature (80 ° C or less) with filtration device 1 and pass water until a certain amount of water is stored in the filtrate measuring tank 24.
- the filtrate measuring tank 24 is a measuring tank as a measuring means. Any measuring means can be used as long as it can measure a certain amount of filtration. For example, in addition to the measuring tank, a flow accumulator can be used.
- a pressurizing means such as a pump gas may be provided between the sampnore introduction tube 22 and the filtration device 1.
- a pressurizing means such as a pump gas
- the filtration rate can be increased and the filtration time can be shortened.
- heating means such as a heater may be installed in the sample introduction tube 22 in front of the filtration device 1, and the sample introduction tube 22 may be heated and filtered.
- the hollow fiber membrane 3 is cut in the longitudinal direction with a razor or the like to expose the inner surface where the fine particles in the ultrapure water are captured.
- the fine particles on the membrane are stained with fuchsin-methylene blue stain.
- a sputtering process is performed. After such pre-processing, the inner surface is enlarged and counted with an optical microscope or scanning electron microscope. Count the number of fine particles in the field. Using the microscope described above, move the field of view and actually observe around 0.01% of the effective filtration area to count the number of trapped fine particles, and calculate the number of trapped fine particles using the following formula (particle number concentration calculation formula). The number of fine particles is calculated.
- n ⁇ ⁇ a V s -V b
- N Number of fine particles per 1 m 1 of ultrapure water (pieces / m 1)
- V b Blank test filtration volume (ml)
- the filtration device for measuring the number of fine particles is a hollow fiber membrane module having a hollow fiber membrane unit in which a hollow fiber membrane is liquid-tightly bonded and fixed to an easily removable joint (fixing member) with an adhesive (resin mold part). is there.
- joints (fixing members) that can be easily removed include commercially available threaded joints such as doubles, sockets, unions, and bushings.
- Examples of the material of the joint (fixing member) include plastics such as stainless steel, polyvinyl chloride vinyl resin, polyvinylidene fluoride resin, polyethylene resin, and polypropylene resin, depending on the sampling point.
- plastics such as stainless steel, polyvinyl chloride vinyl resin, polyvinylidene fluoride resin, polyethylene resin, and polypropylene resin, depending on the sampling point.
- stainless steel and polyvinylidene fluoride resin are preferred because of their good pressure resistance and heat resistance.
- Examples of the adhesive that fixes the hollow fiber membrane to the joint (fixing member) include, for example, epoxy resin, urethane resin, and silicone resin from the viewpoint of pressure resistance and heat resistance.
- the structure of the hollow fiber membrane module (filtration device for measuring the number of fine particles) is a single-end opening structure in which the end opening on one side of the hollow fiber membrane bundle is sealed with an adhesive, but the both-end opening structure is open on both sides. But min. However, in the case of the double-end open structure, all of the ultrapure water is filtered, so that the force S, flushing, and rinsing required to provide a valve or the like on one side of the hollow fiber membrane module can be easily performed.
- Examples of a method for liquid-tightly bonding and fixing a hollow fiber membrane to a joint include, for example, a method in which a required number of linear hollow fiber membranes are inserted into a joint (fixing member) and fixed with an adhesive, There is a method of making a hole larger than the membrane diameter of the hollow fiber membrane in the joint (fixing member), inserting the hollow fiber membrane there, and fixing with an adhesive.
- a long linear hollow fiber membrane it may be fixed to a joint (fixing member) by the following method to produce a particulate number measuring filtration device 31 as shown in FIG. it can.
- cut the side where ultrapure water is introduced the upper side in Fig. 3
- the ring is made twice, when the ultrapure water introduction side of the hollow fiber membrane 32 is cut during use, six ends of the opened hollow fiber membrane 32 are converged.
- the hollow fiber membrane 32 can be easily fixed, and furthermore, since there are only two open portions at both ends until just before use, there is little adhesion of contaminating fine particles to the inner surface. It should be noted that both ends of the hollow fiber membrane 32 are preferably sealed with an adhesive until immediately before use in order to more effectively prevent the adhesion of contaminating fine particles to the inner surface thereof.
- FIG. 4 is a cross-sectional view showing a configuration of a hollow fiber membrane unit used in the filtration device for measuring the number of fine particles according to the third embodiment.
- the hollow fiber membrane unit 201 has a hollow fiber membrane 203 having both ends sealed with a sealing resin 202 (adhesive). Further, the hollow fiber membrane unit 201 is bonded and fixed to a fixing member such as a nipple 204 with an adhesive 205 (resin mold portion) such as an epoxy resin in a state where the sealing portions at both ends are exposed.
- a fixing member such as a nipple 204 with an adhesive 205 (resin mold portion) such as an epoxy resin in a state where the sealing portions at both ends are exposed.
- the hollow fiber membrane unit 201 is loaded into a holder (outer cylinder), and either one of the sealing portions at both ends (the side on which ultrapure water is introduced into the hollow fiber membrane) is cut and hollow.
- the thread membrane 203 is opened to produce a filtration device.
- FIG. 5 is a schematic diagram showing a method for measuring the number of fine particles in ultrapure water according to the fourth embodiment.
- a connecting jig 301 connected to the sampling port of the ultrapure water production apparatus, ultrapure water branched from a pipe through which the ultrapure water flows from the ultrapure water production apparatus toward the use point
- Supply water line 302 supply valve 303, hollow fiber membrane 304, housing 305 (outer cylinder), adhesive 306, concentrated water line 307, concentration valve 308, filtrate water line 309, filtration valve 310 ,
- the number of hollow fiber membranes 304 loaded in the filtration device 316 may be one or more, but is preferably 5 or more in order to improve analysis accuracy.
- the sampling port of the ultrapure water production apparatus is sufficiently blown and connected to the sampling port by the connecting jig 301.
- the concentration valve 308 and the professional water discharge valve 314 are opened, the blow water supply valve 312 is slowly opened, and a certain amount of substitution is performed in the filtration device 316.
- the blow water supply valve 312 is slowly closed, and the concentration valve 308 and the blow water discharge valve 314 are closed.
- the ultrapure water containing fine particles is supplied to the connecting jig 301, the supply water of the ultrapure water by the water pressure at the sampling port of the ultrapure water production device. It is supplied to the hollow fiber membrane 304 in the filtration device 316 via the line 302 and the supply valve 303.
- the ultrapure water is screen-filtered onto the hollow fiber membrane 304 by water pressure, and fine particles in the ultrapure water are captured by the skin layer on the inner surface.
- the ultrapure water from which the fine particles have been removed is supplied to the means 315 for measuring the accumulated filtered water volume (filtered volume) via the filtered water line 309 and the filtered filter valve 310, and the accumulated filtered water volume (filtered volume) is measured.
- supply valve 303 is closed, and the filtration valve 310 is closed to finish sampling.
- the filtration device 316 is sealed by closing the valves 303, 308, 310, 312, and 314 at the five power stations, so that the contaminated fine particles adhere to the hollow fiber membrane 304 from the atmosphere (fine particle contamination) completely. Is prevented.
- the monored up liquid remaining in the hollow fiber membrane 304 contains high-concentration fine particles.
- the filtration valve 310 is opened and dried at room temperature or high temperature (below the upper limit use temperature of various members), the method of extruding to the filtration side with clean N gas, etc. that has passed through an air filter and is free of particulate contamination, Or these
- the hollow fiber membrane 304 is taken out from the filtration device 316 in a clean environment such as a clean bench (clean nolem). Then, in order to prevent the adhesion of contaminating fine particles (fine particle contamination), consider the equipment used, create a sample according to the device that counts the captured fine particles, and count the number of fine particles on the surface of the skin layer of the hollow fiber membrane with a measuring device. . Next, calculate the total filtered water volume (filtration volume), skin layer area (effective filtration area), observation field area (area of 1 field of view), number of observation fields (count field of view), etc. Calculate the number of fine particles in ultrapure water To do.
- a clean bench clean nolem
- each component device used in the filtration device 316 must have a structure, material, and grade that do not have contaminated fine particles attached (fine particle contamination).
- a member marketed exclusively for ultrapure water is preferred.
- As a method of counting the number of fine particles on the surface of the skin layer depending on the particle size to be measured, for example, an optical microscope, a scanning electron microscope, a surface inspection apparatus using a laser single light scattering method, or these Measure together. In particular, a method capable of high magnification, wide field of view, and automatic counting is preferable. Further, since the amount of hold-up liquid remaining in the apparatus 316 after the completion of sampling is very small of the total amount of filtered water, it may be excluded from the accumulated filtered water amount.
- FIG. 6 is a cross-sectional view showing the configuration of the particulate matter measuring filter device according to the present embodiment.
- FIG. 7 is a schematic diagram showing an example of a method for measuring the number of fine particles in ultrapure water using the fine particle number measuring filtration device shown in FIG.
- the fine particle number measuring filtration device 41 has a hollow fiber membrane unit 43.
- Hollow fiber membrane 43 has a hollow fiber membrane 51. One end of the hollow fiber membrane 51 is sealed with a sealing resin 52 (adhesive), and the other end is in an open state.
- the hollow fiber membrane unit 43 has a fixing member such as a nip nozzle 44 via a resin mold part 42 (adhesive) such as an epoxy resin provided between the sealing portion and the opening portion of the hollow fiber membrane 51. Is fixed.
- the nipple 44 is connected with a drain tube 45.
- the drain part outer cylinder 45 functions as a cover for the hollow fiber membrane 51, and a drain part joint 49 having a drain port 48 is connected to the drain part outer cylinder 45.
- a water supply unit outer cylinder 47 having a water supply port 46 is connected to the other side of the nip nozzle 44, and when the ultrapure water is supplied to the water supply unit outer tube 47 from the water supply port 46 side, the ultrapure water is supplied to the water supply unit outer cylinder 47.
- Equipment 41 Blow water outlet 50 for draining outside is provided.
- the hollow fiber membrane unit 43, the drainage portion outer cylinder 45, the water supply portion outer cylinder 47, and the drainage portion joint 49 can be detachably attached. These members are fitted by, for example, a screw structure fitting method, and the inside of the apparatus 41 is sealed at a portion other than the water supply port 46 of the water supply unit outer tube 47 and the blow water drain port 50 and the drain port 48 of the drainage unit joint 49. Sex is to be secured.
- the material of the drain cylinder 45, the water supply cylinder 47 and the drain joint 49 should not generate dust or elute.
- PVDF polyvinylidene fluoride
- PFA tetrafluoroethylene perfluoroethylene
- PEEK polyetheretherketone
- the filtration device 41 for measuring the number of fine particles includes a primary side 53 that communicates with the inner surface side of the hollow fiber membrane 5 : L through the opening end of the hollow fiber membrane 51 by a nipple 44 or the like, and a hollow fiber membrane 51 It is divided into the secondary side 54 that contacts the outer surface side. Movement of fine particles and the like in the ultrapure water between the primary side 53 and the secondary side 54 is performed only through the membrane surface of the hollow fiber membrane 51.
- the hollow fiber membrane 51 is fixed with one end sealed and the other end opened, but the fixing method of the hollow fiber membrane 51 is not limited to this,
- the hollow fiber membrane 51 may be fixed with an adhesive such as a resin in a U-shaped state.
- the hollow fiber membrane unit 43 is provided at one end edge of the drain part outer cylinder 45, but may be installed in a state of being in close contact with the inner wall of the outer cylinder 45, for example.
- the water supply outer cylinder 47 is provided with a water supply port 46 and a blow water drain port 50.
- the drain tube 45 has a drain port 48. It is preferable that at least one such ultrapure water supply / drain port is provided.
- both ends of the hollow fiber membrane 51 are sealed with an epoxy resin or the like in order to prevent the inner surface side of the hollow fiber membrane 51 capturing the fine particles in the ultrapure water from being contaminated from the outside.
- the number of the hollow fiber membranes 51 is preferably 1 to 10 and the length of the hollow fiber membranes 51 is preferably 30 to 100 mm when the filter device 41 is assembled.
- the hollow fiber membrane 51 with both ends sealed is passed through a SUS (Steel Use Stainless) or PEEK nip no. 44, etc., and the hollow fiber membrane 51 and the nipple 44 are bonded with an epoxy resin or the like.
- the hollow fiber membrane unit 43 is produced by fixing.
- the fixing member such as the nipple 44 is likely to be contaminated with fine particles, which causes a measurement error during sampling.
- the cleaning method include, for example, ethanol immersion, surfactant cleaning, and ultrapure water cleaning, in addition to ultrasonic irradiation.
- the produced hollow fiber membrane unit 43 is hydrophilized.
- the hydrophilization treatment it is possible to recover permeation water that decreases as the hollow fiber membrane 51 is dried. Further, the hollow fiber membrane 51 has innumerable pores, and the membrane surface is very uneven when viewed microscopically. Blank particles (contaminated fine particles) are often adsorbed inside pores, uneven gaps, and pores that are difficult to get wet with water, so these parts can be infiltrated with a hydrophilic agent or hot pure water. It is preferable to remove the adsorbed blank particles (contaminated fine particles).
- Hydrophilic methods include, for example, immersion in pure water or chemicals of 40 ° C or higher for 0.5 to 12 hours, preferably:!
- ultrasonic waves or heating may be further combined.
- the frequency of the ultrasonic wave it is possible to obtain a higher blank particle (contaminated fine particle) removal effect than the ultrasonic wave with a frequency of 0.8 to 3 MHz is preferred.
- 40 to 80 ° C. is preferable for enhancing the effect of removing blank particles (contaminated fine particles).
- the agent has a hydrophilic effect on the hollow fiber membrane 51 without affecting the membrane performance, such as deterioration or deterioration.
- alcohols and surfactants may be used as long as they can be exhibited.
- alcohol its type is not particularly limited, but methanol, ethanol, isopropanol, or a mixture thereof can be suitably used.
- a surfactant the type thereof is not particularly limited, but an anionic surfactant, a cationic surfactant, a nonionic surfactant, and an amphoteric surfactant can be suitably used.
- the concentration is preferably 0.1 to 5%, more preferably 0.1 to 1%.
- ultrapure water whose content of fine particles is equal to or less than that of the ultrapure water to be measured is used.
- the secondary side 54 of the filtration device 41 fitted with the drainage outer cylinder 45 and the drainage joint 49 is filled with extrusion water, and the hollow fiber membrane unit 43 that has been hydrophilized is attached.
- secondary particles such as the drainage outer cylinder 45 and the drainage joint 49 are cleaned in advance by contaminating fine particles by ultrasonic irradiation or the like.
- the extruded water at least a bactericidal effect, a bactericidal agent having a bactericidal effect, that is, a drug that suppresses the growth of the fungus can be used. .
- the antibacterial agent examples include alcohols and reducing agents as long as the antibacterial action is not exerted on the hollow fiber membrane 51 without affecting the membrane performance such as deterioration and deterioration.
- alcohol the type is not particularly limited, but for example, methanol, ethanol, isopropanol, or a mixed solution thereof can be preferably used.
- a reducing agent the type of the reducing agent is not particularly limited.
- sodium sulfite, sodium hydrogen sulfite and the like can be used.
- the concentration is preferably 0.1 to 10%, more preferably 0.1 to 1%.
- one end of the hollow fiber membrane 51 is cut and opened with a clean razor, Install the water supply outer cylinder 47 from which contaminated fine particles have been removed in a state where the water is continuously passed through.
- the backwash pressure by the antibacterial agent 0.5 to 3 kgfZ cm 2 is preferable:! To 2 kgf / cm 2 is more preferable.
- it is performed until the antibacterial agent overflows from the water supply port 46 of the water supply unit outer cylinder 47.
- the particulate trapping device 41 in a state where the antibacterial agent is reversely passed through the hollow fiber membrane 51, thus, it is possible to avoid the adhesion of contaminating fine particles and the growth of microorganisms on the inner surface side of the hollow fiber membrane 51 and in the device 41, and to maintain high cleanliness.
- the hollow fiber membrane 51 may be contaminated from the outside, but the device 41 is stored with the antibacterial agent attached to the surface of the hollow fiber membrane 51. Therefore, it is possible to avoid the adhesion of contaminating fine particles to the hollow fiber membrane 51. Therefore, backwashing the hollow fiber membrane 51 with an antibacterial agent prevents contamination of the hollow fiber membrane 51 and the growth of microorganisms, which can only remove the blank particles (contaminated fine particles) effectively. It becomes possible to do.
- FIG. 7 is a schematic diagram showing a method for measuring the number of fine particles in ultrapure water according to this embodiment using the filtration device shown in FIG.
- ultrapure water is passed through the sample introduction tube 63 from the sampling valve 62 attached to the supply pipe 61 of the ultrapure water production apparatus to be inspected, and the filtration apparatus 41 in which the antibacterial agent is sealed.
- Reverse water is passed from drain joint 49 using supply pipe 61 pressure.
- the backwash time is preferably 1 to 60 minutes, more preferably 5 to 20 minutes.
- the flow control valve 64 is preferably 200 mlZmin or more, especially 300 to 600 ml / min.
- the water flow time is preferably 5 minutes or longer.
- the measuring tank 65 is a measuring tank as a measuring means. However, as long as it can measure a certain amount of filtration, the measuring tank 65 can be used. Etc. If necessary, the supply pipe 61 may be provided with a pump, gas pressurizing means, etc. By using the pressurizing means, the filtration rate can be increased and the filtration time can be further shortened. Furthermore, a heating means such as a heater may be installed in the supply pipe 21, the supply pipe 61 may be heated, and ultrapure water may be filtered at a maximum temperature of 80 ° C or lower.
- the hollow fiber membrane 51 is cut in the longitudinal direction with a razor or the like to expose the inner surface side where the fine particles in the ultrapure water are captured.
- fine particles on the membrane are stained with fuchsine-methylene blue staining solution, and when observing with a scanning electron microscope, a sputtering process is performed. Apply.
- the inner surface side is enlarged and the number of fine particles in the counting field is counted with an optical microscope or a scanning electron microscope. Using the microscope described above, the field of view is moved to actually observe around 0.01% of the effective filtration area, and the number of captured fine particles is counted. Using the above formula (1), the number of fine particles in ultrapure water per unit volume is calculated. calculate.
- the number of fine particles in ultrapure water was measured using the filtration device 1 for measuring the number of fine particles shown in FIG.
- it was stored in the drainage section outer cylinder 4 (holder), and the water supply section outer cylinder 6 and the drainage section joint 7 were respectively connected to produce the filtration device 1 shown in FIG.
- ultrapure water was directly introduced into the filtration device 1 from a sampling valve attached to the sample introduction tube of the ultrapure water production device, and was subjected to internal pressure filtration under conditions of a filtration pressure of 0.2 MPa and 25 ° C.
- the hollow fiber membrane 3 was taken out, cut with a razor in the longitudinal direction to expose the inner surface, and sputtering was performed.
- the number of fine particles on the inner surface of the hollow fiber membrane 3 Observation was performed at a magnification of 20,000 with a scanning electron microscope, and the number of fine particles adhering to the inner surface of the hollow fiber membrane 3 was counted within the counting field.
- the measurement target is fine particles with a particle size of 0.02 / im or more, the number of filtration days is 10 days, the number of counting fields is 1000 fields, the number of blank particles (contaminated particulates), the particle count value, the number of counting fields, the counting field area and filtration
- the amount is shown in Table 1.
- the number of fine particles (particle number concentration) in 1 ml of ultrapure water was 5 / ml.
- a flat membrane MF membrane (Comparative Example 1) made of polycarbonate having a pore size of 0.03 ⁇ m and a flat membrane UF membrane (Comparative Example 2) made of regenerated cellulose were used.
- the flat membrane UF membrane used as Comparative Example 2 is the measurement result of Example 1, and the amount of filtered water and the number of filtration days required for the concentration of fine particles of 0.02 ⁇ m or more to be 5 particles / ml. This is inappropriate for the present invention.
- the number was the same 300 fields.
- the number of particles required to calculate the particle number concentration is the same as the number of blank particles (contaminated particles).
- the fine particle count (including blank particles) on the filtration membrane is twice the number of blank particles (contaminated fine particles).
- N 5
- N N X 2 s b
- the filtration volume V was 3150L. Whether this filtration volume is filtered flux, effective filtration area, etc.
- the filtration days were about 280 days.
- Example 2 was carried out in the same manner as Example 1 except that the measurement object was fine particles having a particle size of 0.03 ⁇ m or more, the number of filtration days was 10 days, and the number of counting fields was 1000 fields. Table 2 shows the number of blank particles (contaminated fine particles), fine particle count, counting field number, counting field area, filtration amount, and the like. As a result of calculating the number of fine particles contained in 1 ml of ultrapure water, the number of fine particles (particle number concentration) in 1 ml of ultrapure water was 3 / ml. For the same hollow fiber membrane, Although the number of fields of view was set to 300, the number of trapped particles was less than the number of particles necessary for calculating the particle number concentration. Therefore, the number of fine particles necessary for calculating the particle number concentration was substituted into formula (1), and ultrapure water was used. The number of fine particles in lml (concentration of fine particles) was calculated.
- a method for calculating the fine particle number concentration will be described below.
- the minimum number of particles required for calculating the concentration of fine particles is at least 20, and the number of captured particles with blank particle correction is less than this.
- Fine particle count (including blank particles) 7
- Example 2 since this hollow fiber membrane has a small number of blank particles (contaminated fine particles), the required number of fine particles 20 can be counted by 1000 field counting, and a measurement result of 3 particles / ml can be obtained. did it.
- Comparative Example 3 a flat membrane MF membrane was used and the filtration days were set to 10 days and the counting field number was set to 300 fields in the same manner as in Example 2. The number of particles required for calculation was not reached. Therefore, the number of fine particles necessary for calculating the particle number concentration was substituted into the above formula (1) to calculate the number of fine particles in 1 ml of ultrapure water, and the result is shown in Table 2 as less than that value. As shown in Table 2, since the number of blank particles (contaminated fine particles) adhering to the film surface is larger than that in Example 2, the merit of increasing the number of counting fields cannot be expected.
- Example 3 was performed in the same manner as in Example 1 except that the measurement target was fine particles having a particle size of 0.03 ⁇ m or more, the number of filtration days was 3, and the number of counting fields was 300. Table 3 shows the number of blank particles (contaminated fine particles), fine particle count, counting field number, counting field area, filtration amount, and the like. As a result of calculating the number of fine particles contained in 1 ml of ultrapure water, the number of fine particles in 1 ml of ultrapure water was 25 Zml.
- a flat membrane MF membrane (Comparative Example 5) made of polycarbonate having a pore size of 0.03 ⁇ m and a flat membrane UF membrane (Comparative Example 6) made of regenerated cellulose were used.
- Example 5 As Comparative Example 5, a flat MF membrane was used, the number of filtration days was 28 days, the number of counting fields was 300, and the same procedure as in Example 3 was performed. Table 3 shows the number of blank particles (contaminated fine particles), fine particle count, counting field number, counting field area, filtration amount, and the like. As a result of calculating the number of fine particles contained in lm 1 of ultrapure water, the number of fine particles in 1 ml of ultrapure water was 28 / ml.
- Comparative Example 6 a flat membrane UF membrane was used, the number of filtration days was 22 days, the number of counting fields was 300, and the same procedure as in Example 3 was performed. Table 3 shows the number of blank particles (contaminated fine particles), fine particle count, counting field number, counting field area, filtration amount, and the like. As a result of calculating the number of fine particles contained in lm 1 of ultrapure water, the number of fine particles in 1 ml of ultrapure water was 27 / ml.
- the number of fine particles in ultrapure water was measured using a filtration device 41 for measuring the number of fine particles shown in FIG.
- a filtration device 41 for measuring the number of fine particles shown in FIG.
- resin mold part 42 epoxy resin
- both ends of the hollow fiber membrane were sealed with epoxy resin to produce a hollow fiber membrane unit sealed at both ends.
- the hollow fiber membrane unit sealed at both ends was immersed in a surfactant to make it hydrophilic.
- the secondary side member formed by connecting the drain part outer cylinder 45 and the drain part joint 49 was filled with sodium sulfite and the hydrophilic hollow fiber membrane unit sealed at both ends was inserted. .
- Sodium bisulfite was supplied from drainage joint 49. After confirming that sodium bisulfite oozes from the upper part of the hollow fiber membrane, the upper part of the hollow fiber membrane (5 to 10 mm above the nipple 44) was cut with a clean razor. Further, the sodium bisulfite was reversely passed, and the air in the hollow fiber membrane was removed. Subsequently, the water supply outer cylinder 47 was attached while water was flowing backward while the sodium bisulfite was pressurized. After confirming that sodium bisulfite overflowed from the water supply port 46 of the water supply outer cylinder 47, the cap was closed on the water supply port 46. The cap was closed at the drain outlet 48 of the drain joint 49 and the filtration device 41 was sealed.
- ultrapure water was introduced into the filtration device 41 shown in Fig. 6 from a sampling valve attached to the pipe of the ultrapure water production device to be detected through a clean sample introduction tube.
- the sampling valve used here is sterilized with hot pure water just before installation and blown for 12 hours or more.
- Ultrapure water was supplied to the drain outlet 48 of the drainage joint 49, and the sodium hydrogen sulfite sealed in the device 41 was discharged by reverse flow and replaced with ultrapure water. Thereafter, the drain port 48 of the drainage joint 49 was capped, and ultrapure water was supplied to the feed port 46 of the water supply unit outer cylinder 47.
- a flow control valve was installed at the blow water drain port 50 of the water supply outer cylinder 47, and blowing started at 600ml / min. After blowing for 5 minutes, the flow rate was adjusted to 100 ml / min with the flow rate adjustment valve. After adjustment, the cap of the drain outlet 48 of the drain joint 49 was removed.
- the filtration flow rate was 4 ml / min.
- the ratio of the blow water drainage blow rate and filtration flow rate of the water supply outer cylinder was 25: 1.
- the filtration period was 30 days. After 30 days, the cap was closed at the drainage port 48 of the drainage joint 49. After that, the flow control valve was removed, the cap was closed at the blow water drain port 50, the cap was plugged from the sampling valve to the water supply port 46 of the water supply outer cylinder 47, and the filtration device 41 was transported to the clean room in a sealed state.
- the hollow fiber membrane unit 43 was taken out from the device 41, the hollow fiber membrane 51 was cut in the longitudinal direction with a razor to expose the inner surface, and sputtering was performed. Next, inside The inner surface of the hollow fiber membrane 51 was observed with a scanning electron microscope at a magnification of 40,000, and the number of fine particles adhering to the inner surface was counted within the counting field.
- the measurement target is fine particles with a particle size of 0 ⁇ ⁇ ⁇ or more, the filtration period is 30 days, the number of counting fields is 1200, the number of blank particles (contaminated fine particles), the number of fine particles, the number of counting fields, the filtration amount, etc.
- Table 4 As a result of calculating the number of fine particles contained in 1 ml of ultrapure water, the concentration of fine particles in 1 ml of ultrapure water was 1 ⁇ ml.
- ultrapure water was sampled using a regenerated cellulose flat membrane UF membrane with a filtration day of 30 days and a total field of view of 1200. Specifically, ultrapure water was used for filtration from a sampling valve attached to the sample introduction tube of the same ultrapure water production apparatus as in Example 4. After filtering the required filtration volume, it was transported to a clean noreme in a sealed state. In a clean noreme, a flat film was sputtered, the number of fine particles on the film surface was observed with a scanning electron microscope 40,000 times, and the number of fine particles adhering to the film surface was counted within the counting field.
- the number of trapped particles with a large number of blank particles (contaminated fine particles) was less than the number of particles necessary for calculating the particle number concentration. Therefore, assuming that the number of particles necessary for calculating the particle number concentration is the number of trapped particles, the above equation (1) is substituted, and the number of particles in lml of ultrapure water (particle number concentration) is calculated.
- the notation is shown in Table 4 as less than that value. As shown in Table 4, the particle number concentration was less than 20 particles / ml, but the particle number concentration could not be specified.
- the amount of filtered water and the number of filtration days required to achieve the measurement target particle number concentration force / ml, which is the measurement result of Example 4, are expressed by the above formula (1). It calculated using. As a result, the required amount of filtered water was 12600L (however, ⁇ ), and the number of filtration days was 580 ⁇ .
- Example 9 As Comparative Example 9, the same procedure as in Example 4 was performed, except that reverse filtration without an antibacterial effect was performed when the filtration device 41 was produced. As a result of observing fine particles on the inner surface of the hollow fiber membrane 51 with a scanning electron microscope, it was impossible to count due to propagation of viable bacteria.
- Example 4 using a UF hollow fiber membrane has a smaller number of blank particles (contaminated particulates) than that of Comparative Example 7 using a flat membrane.
- the amount of ultrapure water flowing through the membrane was reduced, and the filtration time was greatly shortened.
- ultrapure water was blown from the water supply port 46 of the water supply unit outer tube 47 toward the blow water drain port 50, so that the filtration device 41 including the sampling valve was compared with Comparative Examples 8 to 9. It was possible to suppress particulate contamination from the introduction system.
- the number of fine particles of 0.03 zm or more in ultrapure water was measured using the filtration device 316 for measuring the number of fine particles shown in FIG.
- the filtration device 316 for measuring the number of fine particles shown in Fig. 5 was installed at the sampling point of the ultrapure water production apparatus (not shown), and the following sampling was performed.
- a filtration device 316 for measuring the number of fine particles is attached to the sampling point, and ultrapure water is supplied from the surface opposite to the surface that captures the fine particles (in this embodiment, the outer surface side). The inside water was replaced, and the flow path space in the hollow fiber membrane 304 and the device 316 were blown up about 100 times the hold-up amount (about 100 ml).
- the standard of the filtration amount is obtained by using the blank particles (contaminated fine particles) of the hollow fiber membrane to be used and the target measurement lower limit force.
- the filtration amount is determined so that this value is significantly higher than the number of blank fibers (contaminated fine particles) in the hollow fiber membrane.
- the amount of filtered water of about 10 L is required to measure the number of fine particles in ultrapure water containing fine particles of 1000 particles / L. Required.
- the total amount of filtration required to pass water through 10 hollow fiber membranes was determined to be 100 L.
- the amount of time required for the accumulated filtered water to reach the above-mentioned predetermined filtered water amount was about 40 hours, and the ultrafine particle capture was completed in a very short time.
- Table 6 shows the number of fine particles observed on the inner surface of the hollow fiber membrane.
- the average value N of the number of fine particles trapped on the inner surface of the hollow fiber membrane is obtained as follows.
- Fine particle concentration C in ultrapure water is calculated by the following formula.
- V s Filtration volume of ultrapure water per L hollow fiber membrane (L)
- N s Average value of the number of blank particles [number of contaminating particles]
- the fine particle concentration in the ultrapure water in this example is the fine particle concentration in the ultrapure water in this example.
- the number of fine particles in ultrapure water was measured using a filtration device 601 for measuring the number of fine particles shown in FIG.
- a polysulfone UF hollow fiber membrane 602 having a skin layer on both the inner and outer surfaces of Asahi Kasei Chemicals Corporation shown in Fig. 8 nominal fractional molecular weight 10,000
- One end of the hollow fiber membrane 602 is sealed with an adhesive 604 (urethane resin) and bonded and fixed to a polyvinylidene fluoride nipple (PT1 / 2) 6 03 with an adhesive 604 (urethane resin).
- the nipple 603 has a screw A portion 6 05 and a screw B portion 606.
- the screw A portion 605 is a normal 1/2 inch size PT screw and can be easily attached to the sampling point.
- the screw B part 606 may be used as an outer cylinder that collects the filtrate after capturing the fine particles.
- the number of fine particles in ultrapure water was measured using a filtration device 701 for measuring the number of fine particles shown in FIG.
- the sampling point of the ultrapure water production system is a polysulfone UF hollow fiber membrane 702 (nominal component) made by Asahi Kasei Chemicals Co., Ltd. with skin layers on both the inside and outside surfaces.
- One end of the hollow fiber membrane 702 is sealed with an adhesive 705 (epoxy resin), and is bonded and fixed to the 1S stainless steel ferrule joint 704 with an adhesive 705 (epoxy resin).
- the hollow fiber membrane 702 adhered and fixed to the ferrule joint 704 is fixed to a 1S stainless steel ferrule joint 706 (PTl / 4, with screws) for attachment to a sampling point via a 1S ferrule packing 703. .
- the device 701 can be attached to the sampling point via the 1S ferrule packing 703 with a single touch, which is further simplified.
- the number of particles required for calculating the number of particles [20], [the same number as the number of blank particles], [standard deviation X 3 of the number of blank particles] is the maximum number. In this example and Comparative Example 3, 20 particles were required, and in Comparative Example 4, blank particles were required.
- the number of particles required for calculating the particle number degree: [20], [the same number as the number of blank particles], [the percentage deviation X 3 of the number of blank particles] is the maximum number.
- 20 particles were required, and in Comparative Example 6, the number of blank particles was the required number of particles.
- Example 4 Comparative Example F Comparative Example 8 Comparative Example 9 Filtration Membrane Condition Blank Particle Count [M 2 ] 5.E + 04 1.E + 07 5.E + 04 5.E + 04 Filtration Flux [ml / cm 2 / mi (VO.5MPa / 25 ° C) 4.2 4.7 4.2 4,2 Effective filtration area [cm 2 ] 0.94 3.1 0.94 0.94 Pore size (molecular weight cut off) 0.01 (10000) 0.01 C100000) 0.01 (10000) 0.01 (10000) Filtration test results Filtration volume [L] 173 643 173 173 Filtration volume [ ⁇ ] 30 30 30 30 30 30 Blow flow rate [ml / min] 100 0 0 100 Counting view i number 1200 1200 1200 1200 Counting field area [mm 2 ] 0.01 0.01 0.01 0.01 Fine particle needle value (including blank particles) [pieces] 25 420 105 Uncountable number of blank particles [pieces] 5 400 5 5 Number of trapped particles [
- Average value (fine particle count: 100mm 2 )
- the method for measuring the number of fine particles in ultrapure water of the present invention, the filtration device for measuring the number of fine particles, the method for producing the same, and the hollow fiber membrane unit used in the device have a minimum measurable particle size and improved analysis accuracy.
- the filtration time can be shortened and simplified. Therefore, it is suitable as a method for measuring the number of fine particles of ultrapure water containing finer particles, a filtration device for measuring the number of fine particles, and a hollow fiber membrane unit used in the device.
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Abstract
Description
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007500467A JP4745326B2 (ja) | 2005-01-31 | 2006-01-18 | 超純水中の微粒子数測定方法、微粒子数測定用ろ過装置、その製造方法及びその装置に用いる中空糸膜ユニット |
| CN2006800036115A CN101111755B (zh) | 2005-01-31 | 2006-01-18 | 超纯水中的微粒数测定方法、微粒数测定用过滤装置、其制造方法以及用于该装置的中空纤维膜单元 |
| US11/883,305 US7805983B2 (en) | 2005-01-31 | 2006-01-18 | Method for measuring the number of fine particles in ultrapure water and method for manufacturing a filtration device for measuring the number of fine particles in ultrapure water |
| KR1020077017235A KR101177154B1 (ko) | 2005-01-31 | 2006-01-18 | 초순수 중의 미립자수 측정 방법, 미립자수 측정용 여과장치, 그 제조 방법 및 그 장치에 사용되는 중공사막 유닛 |
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| JP2005023706 | 2005-01-31 | ||
| JP2005-023706 | 2005-01-31 | ||
| JP2005036462 | 2005-02-14 | ||
| JP2005-036462 | 2005-02-14 | ||
| JP2005-058221 | 2005-03-02 | ||
| JP2005058221 | 2005-03-02 | ||
| JP2005-336252 | 2005-11-21 | ||
| JP2005336252 | 2005-11-21 |
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| WO2006080211A1 true WO2006080211A1 (ja) | 2006-08-03 |
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| PCT/JP2006/300586 Ceased WO2006080211A1 (ja) | 2005-01-31 | 2006-01-18 | 超純水中の微粒子数測定方法、微粒子数測定用ろ過装置、その製造方法及びその装置に用いる中空糸膜ユニット |
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| US (1) | US7805983B2 (ja) |
| JP (1) | JP4745326B2 (ja) |
| KR (1) | KR101177154B1 (ja) |
| CN (1) | CN101111755B (ja) |
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| JP2012154648A (ja) * | 2011-01-21 | 2012-08-16 | Nomura Micro Sci Co Ltd | 超純水中の微粒子数測定方法及び測定装置 |
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| JP7774174B1 (ja) * | 2025-05-07 | 2025-11-20 | 野村マイクロ・サイエンス株式会社 | 超純水中の微粒子測定システム及び測定方法 |
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| FR2946432B1 (fr) * | 2009-06-04 | 2011-06-24 | Otv Sa | Procede d'analyse d'une eau en vue d'en determiner la teneur en polluants dissous, et installation correspondante |
| CN201470322U (zh) * | 2009-08-11 | 2010-05-19 | 林衍良 | 可更换式中空纤维膜过滤装置 |
| JP2012115810A (ja) * | 2010-12-03 | 2012-06-21 | Kurita Water Ind Ltd | 超純水中の微粒子捕捉システム及び微粒子濃度測定方法 |
| WO2012112545A2 (en) * | 2011-02-14 | 2012-08-23 | The Administrators Of The Tulane Educational Fund | A device and method for monitoring the presence, onset and evolution of particulates in chemically or physically reacting systems |
| US9498753B2 (en) * | 2012-03-15 | 2016-11-22 | Koch Membrane Systems, Inc. | Method for sealing hollow fiber membranes |
| CN105517960A (zh) * | 2013-10-04 | 2016-04-20 | 栗田工业株式会社 | 超纯水制造装置 |
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| CN102175632A (zh) * | 2010-12-31 | 2011-09-07 | 聚光科技(杭州)股份有限公司 | 一种细菌检测方法及装置 |
| JP2012154648A (ja) * | 2011-01-21 | 2012-08-16 | Nomura Micro Sci Co Ltd | 超純水中の微粒子数測定方法及び測定装置 |
| CN108226344A (zh) * | 2018-01-09 | 2018-06-29 | 湖北中烟工业有限责任公司 | 一种卷烟烟用水基胶挥发性成分检测方法 |
| JP2019150761A (ja) * | 2018-03-02 | 2019-09-12 | 株式会社コンタミネーション・コントロール・サービス | 金属汚染物質除去装置 |
| WO2021199623A1 (ja) * | 2020-04-03 | 2021-10-07 | オルガノ株式会社 | 水質管理方法、情報処理装置および情報処理システム |
| JP2021162564A (ja) * | 2020-04-03 | 2021-10-11 | オルガノ株式会社 | 水質管理方法、情報処理装置および情報処理システム |
| JP7766999B2 (ja) | 2020-04-03 | 2025-11-11 | オルガノ株式会社 | 水質管理方法、情報処理装置および情報処理システム |
| TWI912290B (zh) * | 2020-04-03 | 2026-01-21 | 日商奧璐佳瑙股份有限公司 | 水質管理方法 |
| JP7774174B1 (ja) * | 2025-05-07 | 2025-11-20 | 野村マイクロ・サイエンス株式会社 | 超純水中の微粒子測定システム及び測定方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080168828A1 (en) | 2008-07-17 |
| JPWO2006080211A1 (ja) | 2008-06-19 |
| CN101111755B (zh) | 2012-01-25 |
| JP4745326B2 (ja) | 2011-08-10 |
| KR101177154B1 (ko) | 2012-08-24 |
| US7805983B2 (en) | 2010-10-05 |
| TW200700712A (en) | 2007-01-01 |
| KR20070112114A (ko) | 2007-11-22 |
| CN101111755A (zh) | 2008-01-23 |
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