WO2017078043A1 - フィルタ付き注出部材 - Google Patents
フィルタ付き注出部材 Download PDFInfo
- Publication number
- WO2017078043A1 WO2017078043A1 PCT/JP2016/082519 JP2016082519W WO2017078043A1 WO 2017078043 A1 WO2017078043 A1 WO 2017078043A1 JP 2016082519 W JP2016082519 W JP 2016082519W WO 2017078043 A1 WO2017078043 A1 WO 2017078043A1
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- WIPO (PCT)
- Prior art keywords
- filter
- container
- prefilter
- dropping
- filtrate
- Prior art date
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- 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
- B01D63/08—Flat membrane modules
- B01D63/089—Modules where the membrane is in the form of a bag, membrane cushion or pad
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1669—Cellular material
- B01D39/1676—Cellular material of synthetic origin
-
- 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
- B01D63/08—Flat membrane modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/04—Deformable containers producing the flow, e.g. squeeze bottles
- B05B11/047—Deformable containers producing the flow, e.g. squeeze bottles characterised by the outlet or venting means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/04—Closures with discharging devices other than pumps
- B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
- B65D47/18—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages for discharging drops; Droppers
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- 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
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
- B01D2239/0421—Rendering the filter material hydrophilic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1208—Porosity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1216—Pore size
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/36—Hydrophilic membranes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M1/00—Apparatus for enzymology or microbiology
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
- G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration
Definitions
- the present invention relates to an extraction member with a filter for dropping a certain amount of filtrate while filtering a suspension.
- the applicant of the present invention is suitably used for such a gene amplification method, and heats a specimen in a treatment solution to inactivate the bacteria so that the genetic test can be performed easily and safely.
- a compound preparation solution (DNA extract) can be prepared while maintaining a state isolated from the external environment by performing a process of eluting nucleic acids from the body and a process of removing contaminants in a single container.
- a container has been proposed (see Patent Document 1), and such a duplex container is widely used, for example, as a tuberculosis diagnostic kit (see Non-Patent Document 2).
- the sample heat treatment liquid and the adsorbent contained in the container main body are stirred and mixed, and impurities in the sample heat treatment liquid are adsorbed.
- the sample preparation liquid is dropped from the spout of the pouring member into the dropping container while filtering the slurry-like suspension through a filter attached to the pouring member. .
- the dripping container into which the sample preparation solution has been injected is set in an amplification device, heated at a predetermined temperature for a predetermined time, and a genetic test is performed by judging the result of the amplification reaction. In order to perform the measurement accurately and in a short time, an appropriate amount of the sample preparation solution must be injected into the dropping container.
- Patent Document 1 the upper liquid level line indicating the upper limit of the appropriate amount of the sample preparation liquid and the lower liquid level line indicating the lower limit are displayed on the dropping container, and the tip of the spout is positioned on the upper side.
- the present invention is suitably used for the gene amplification method described above, for example, and while filtering a suspension containing fine particles such as an adsorbent, the filtrate is dropped into a dropping container and the dropping amount is excessive.
- the suction operation when sucking the excess can be performed satisfactorily without impairing the dropping performance and filtration performance.
- An object is to provide an extraction member with a filter.
- the pouring member with a filter according to the present invention drops the filtrate into the dropping container while filtering the suspension, and when the dropping amount is excessive, the excess can be sucked, and a certain amount of the filtrate is dropped into the dropping container.
- the filter is a pouring member with a filter for injecting into the filter, and the filter for filtering the suspension is a composite in which a prefilter made of a continuous porous foam that is softened at least in a wet state is disposed on the filtration surface side of the membrane filter
- the configuration is a filter.
- a certain amount of filtrate can be injected into the dropping container with good operability without depending on the skill of the operator.
- notch sectional drawing which shows the outline of a compound container provided with the extraction member with a filter which concerns on embodiment of this invention. It is explanatory drawing which shows the process of adding a test substance to the process liquid accommodated in the subcontainer, sealing with a cover body, and heat-processing the whole container. It is explanatory drawing which shows the process which mounts a subcontainer in the mounting part of a container main body, and stirs and mixes the heat processing liquid of the sample which flowed in the container, and the adsorbent accommodated in the container main body. It is explanatory drawing which shows the process of mounting
- FIG. 1 shows an example of a duplex container 1 including a container main body 2 and a sub container 3 together with a filter-equipped extraction member 4 according to the present embodiment.
- a duplex container 1 is collected from a subject when diagnosing whether or not the subject is infected with an infection such as tuberculosis based on the LAMP method (see Non-Patent Document 1) developed by the present applicant, for example. It is suitably used as a container for preparing a sample preparation solution by processing a sample such as sputum (see Non-Patent Document 2).
- the sub-container 3 has a cylindrical body 31 whose upper end is an opening and whose lower end is closed by a partition wall 30, and a lid 32 attached to the opening of the body 31. And have.
- the sub-container 3 contains a treatment liquid S 1 for heat-treating the specimen, and the inside of the container is sealed by attaching a lid 32 to the body 31.
- the container body 2 has a barrel portion 21 formed in a cylindrical shape.
- the sub container 3 is mounted on the upper end side of the barrel portion 21, and at that time, the partition 30 is cut to cut the partition wall 30.
- a mounting portion 22 in which a portion 221 is formed is provided.
- a content take-out port 23 closed by the partition wall 20 is provided on the lower end side of the body portion 21, and the extraction member 4 with a filter is attached to the content take-out port 23.
- the container body 2 contains an adsorbent S 3 such as activated alumina, silica gel, or zeolite, and the inside of the container is sealed by attaching the sealing member 5 to the mounting portion 22.
- the filter-equipped pouring member 4 is attached to the inside of the outer cylinder part 41 as an attachment part when the container body 2 is attached, and the partition wall of the container body 2 when attached to the container body 2 And a cutting portion 42 for cutting 20. Further, a spout 411 is formed at the center of the bottom plate portion 410 of the outer cylinder portion 41, and the base of the spout 411 is inserted when the spout 411 is inserted into the dropping container 7 described later. A positioning projection 415 for positioning the tip of the spout 411 in the direction is formed.
- the cylindrical base portion 421 of the cutting portion 42 is engaged with the annular engagement protrusion 412 that protrudes toward the inner surface side of the bottom plate portion 410 of the outer cylinder portion 41, whereby the cutting portion 42. Is attached to the inside of the outer cylinder portion 41.
- the membrane filter MF is held between the outer cylinder part 41 and the cutting part 42, and the prefilter PF is held in the cylinder of the cutting part 42.
- the extraction member 4 with a filter is equipped with the filter F made into the composite filter by arrange
- the detail of the filter F with which the extraction member 4 with a filter which concerns on this embodiment is provided is mentioned later.
- a sample preparation liquid by treating a sample collected from a subject is first specimen S 0 was added to the treatment liquid S 1 accommodated in the sub-container 3 (Fig. 2 (Refer to (a)), the lid 32 is sealed, and the whole container is heated (see FIG. 2B). If it contains bacteria such as Mycobacterium tuberculosis in the specimen S 0, the bacteria were inactivated nucleic acid is eluted from the cells by this heat treatment.
- the sealing member 5 is removed from the container body 2 (see FIG. 3A), and the sub-container 3 that has been subjected to the heat treatment is mounted on the mounting portion 22 of the container body 2 (see FIG. 3B).
- the partition 30 that closes the lower end side of the sub-container 3 is cut by the cutting part 221 formed in the mounting part 22.
- the container main body 2 contains the adsorbent S 3 , and the sample heat treatment liquid S 2 and the adsorbent S 3 that have flowed into the container main body 2 are agitated by shaking or kneading the container main body 2. and mixed to obtain a slurry of suspension S 4, the contaminants heat-treated solution S 2 of the sample is adsorbed to the adsorbent S 3 is removed (see Figure 3 (c)).
- an upper liquid level line 71 indicating an upper limit of an appropriate amount of the sample preparation liquid and a lower liquid level line 72 indicating the lower limit are displayed. For example, if the appropriate volume is 25 to 35 ⁇ L, the liquid volume indicated by the upper liquid level line 71 is 35 ⁇ L, and the liquid volume indicated by the lower liquid level line 72 is 25 ⁇ L.
- the positioning protrusion 415 formed at the base of the spout 411 is brought into contact with the opening edge of the dropping container 7, so that the tip of the spout 411 is Then, positioning in the insertion direction is performed so as to overlap the upper liquid level line 71.
- the sample preparation liquid injected into the dripping container 7 can always be in an appropriate amount.
- the adsorbent fine particles captured by the filter F when the suspension is filtered are aspirated. If the liquid flow at the time is obstructed, it takes time for the suction operation, and in a remarkable case, there is a possibility that an excessive amount of the sample preparation liquid dropped in the dropping container 7 cannot be sucked.
- a composite in which the filter F included in the extraction member 4 with a filter is disposed on the filtration surface side of the membrane filter MF is at least a prefilter PF made of a continuous porous foam that is softened in a wet state.
- a prefilter PF made of a continuous porous foam that is softened in a wet state.
- the prefilter PF has a certain degree of rigidity in the dry state in consideration of ease of attachment to the filter-equipped extraction member 4 and attachment accuracy, and absorbs moisture in the suspension during operation. It is preferably softened in the wet state, but may be softened in the dry state as well as in the wet state. The phrase “softens at least in a wet state” means to include both.
- the pre-filter PF is disposed apart from the filtration surface of the membrane filter MF, but may be disposed over the membrane filter MF.
- the prefilter PF has an average pore diameter of 130 to 180 ⁇ m and a porosity of a pre-filter PF in a wet state assumed during operation so that the above-described effects can be more satisfactorily performed without impairing dropping performance and filtration performance. It is preferably 89 to 91%. If it is less than the above range, the filtration flow rate tends to decrease, and the dropping performance tends to be impaired. When the above range is exceeded, there is a tendency that the fine particles that pass through the prefilter PF increase and the suction performance is impaired due to clogging of the membrane filter MF.
- the prefilter PF preferably has a compressive stress of 2.9 to 6.3 kPa in a wet state assumed during operation. If it is less than the above range, it will be too soft, and there is a concern that it will fall off the filter-equipped extraction member 4. When the above range is exceeded, the flexibility is inferior, and the fine particles trapped in the pores are difficult to be released, and the suction performance tends to be impaired.
- the compressive stress is a compressive stress in the range of 20-30% compressive deformation.
- the prefilter PF preferably has a dry thickness of 1 to 3 mm. If the amount is less than the above range, the suction performance tends to decrease. When it exceeds the above range, the dropping performance tends to be impaired.
- the prefilter PF when a prefilter PF that softens in a wet state is used, the prefilter PF preferably has a water retention rate of 850% or more so that the prefilter PF can be sufficiently wet in a short time.
- the material of the prefilter PF a material that does not detach from the material and satisfies the above-mentioned conditions is preferably used.
- a material that does not detach from the material and satisfies the above-mentioned conditions is preferably used.
- the shape processing when attaching to the extraction member 4 with a filter is easy.
- a sponge made of polyvinyl alcohol (PVA sponge) is particularly preferable.
- the membrane filter MF various types characterized by the material such as a membrane filter made of hydrophilic polyvinylidene fluoride, a membrane filter made of hydrophilic polyethylene terephthalate, a membrane filter made of hydrophilic polyethersulfone are known. .
- the membrane filter MF used in the present embodiment is preferably hydrophilic, and it is particularly preferable to use a hydrophilic polyethersulfone membrane filter having a large filtration flow rate among the above-described ones.
- Example 1 In the double container 1 shown in FIG. 1, 480 mg of zeolite having an average particle diameter of 5 ⁇ m was accommodated in the container body 2, and 0.94 mL of the treatment liquid (main component: sodium hydroxide solution) was accommodated in the sub container 3. Moreover, the composite filter which has arrange
- Prefilter PF “Belle eta E (D)” manufactured by Aion Co., Ltd. (PVA sponge, wet average pore diameter 130 ⁇ m, same porosity 90%, same compression stress 4.7 kPa, water retention 1100%, thickness 2 mm)
- duplex containers 1 Ten sets of such duplex containers 1 are prepared, and in each of the duplex containers 1, the sub container 3 is mounted on the mounting portion 22 of the container body 2, and the processing liquid in the sub container 3 is caused to flow into the container body 2. Sufficient stirring and mixing with the zeolite contained in the main body 2 gave a slurry suspension. Of these, 5 groups were subjected to a drop performance evaluation test, and the remaining 5 groups were subjected to a suction performance evaluation test.
- Example 2 Example 1 except that PVA sponge manufactured by Eagle Kasei Co., Ltd. (average pore diameter when wet: 130 ⁇ m, porosity: 2.9 kPa, compression stress: 2.9 kPa, water retention: 950%, thickness: 2 mm) was used for the prefilter PF.
- evaluation tests for dropping performance and suction performance were performed. About dripping performance and suction performance, eight sets of compound containers 1 were prepared, respectively, and an evaluation test was performed. The results are shown in Table 1.
- Example 3 Example except that “AC Sponge P” manufactured by AC Chemical Co., Ltd. (PVA sponge, wet average pore diameter 130 ⁇ m, same porosity 90%, water retention 1100%, thickness 2 mm) was used for the prefilter PF.
- evaluation tests for dropping performance and suction performance were performed. About dripping performance and suction performance, eight sets of compound containers 1 were prepared, respectively, and an evaluation test was performed. The results are shown in Table 1.
- Example 4 Except for using “Piolus EVA” (ethylene-vinyl acetate copolymer sponge, average pore diameter when wet, 25 ⁇ m, porosity of 77%, water retention of 340%, thickness of 1 mm) manufactured by Aion Co., Ltd. for the prefilter PF
- evaluation tests for dropping performance and suction performance were performed. About dripping performance and suction performance, three sets of compound containers 1 were prepared, respectively, and an evaluation test was performed. The results are shown in Table 1.
- Example 1 An evaluation test of dropping performance, suction performance, and filtration performance was conducted in the same manner as in Example 1 except that the membrane filter MF was used alone without using the prefilter PF.
- the partition 20 that closes the content outlet 23 of the container main body 2 is cut, and the content outlet 23 is cut.
- the specific structure of the filter-equipped extraction member according to the present invention is not limited to this.
- the pouring member with a filter according to the present invention drops the filtrate into the dropping container while filtering the suspension, and when the dropping amount is excessive, the excess can be sucked, and a certain amount of the filtrate is dropped into the dropping container.
- a pouring member with a filter for injecting into water it can be widely used in various fields.
- the prefilter PF made of a continuous porous foam in which the filter F for filtering the suspension is softened at least in a wet state is disposed on the filtration surface side of the membrane filter MF.
- a composite filter may be used, and other matters can be appropriately changed without being limited to the above-described embodiment. The matters described in the above-described embodiments can be appropriately selected and combined.
- the extraction member with a filter according to the present invention can be widely used in various fields as a member for dropping a certain amount of filtrate while filtering a suspension.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Sampling And Sample Adjustment (AREA)
- External Artificial Organs (AREA)
- Closures For Containers (AREA)
- Filtering Materials (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
遺伝子検査では、検体に含まれているわずかな量の目的の遺伝子を検出するために、かかる遺伝子を増幅する必要があるが、従来の遺伝子増幅法は、工程が多く操作が煩雑であり、コストも高くなってしまうなどの問題があった。このため、本出願人は、増幅したい標的遺伝子を含むサンプルを所定の試薬とともに、所定の温度でインキュベートすることで、標的遺伝子のみを効率良く増幅することができ、増幅した標的遺伝子の検出も容易な遺伝子増幅法(LAMP法)を開発している(非特許文献1参照)。
かかる複式容器1は、例えば、本出願人が開発したLAMP法(非特許文献1参照)に基づいて、被験者が結核などの感染症に感染しているか否かを診断するに際し、被験者から採取した喀痰などの検体を処理して検体調製液を調製するための容器として好適に用いられる(非特許文献2参照)。
また、副容器3には、検体を加熱処理する処理液S1が収容され、胴部31に蓋体32を取り付けることによって容器内を密封するようにしてある。
また、容器本体2には、活性アルミナ、シリカゲル、又はゼオライトなどの吸着剤S3が収容され、封止部材5を装着部22に取り付けることによって容器内を密封するようにしてある。
また、外筒部41の底板部410の中央には、注出口411が形成されているとともに、注出口411の基部には、後述する滴下容器7に注出口411を挿入する際に、その挿入方向における注出口411の先端の位置決めをするための位置決め突部415が形成されている。
なお、本実施形態に係るフィルタ付き注出部材4が備えるフィルタFの詳細については後述する。
容器本体2には吸着剤S3が収容されており、容器本体2を振ったり、揉んだりなどすることによって、容器本体2に流入した検体の加熱処理液S2と吸着剤S3とを撹拌、混合してスラリー状の懸濁液S4とし、検体の加熱処理液S2中の夾雑物を吸着剤S3に吸着させて除去する(図3(c)参照)。
滴下容器7には、検体調製液の適正な量の上限を示す上位の液位線71と、その下限を示す下位の液位線72とを表示しておく。例えば、適正な量が25~35μLであれば、上位の液位線71が示す液量を35μLとし、下位の液位線72が示す液量を25μLとする。
そして、注出口411を滴下容器7に挿入したときに、注出口411の基部に形成された位置決め突部415を滴下容器7の開口部端縁に当接させることで、注出口411の先端が、上位の液位線71に重なるように挿入方向の位置決めをする。
メンブレンフィルタMFを単独で用いると、ろ過面に捕捉された吸着剤の微粒子がメンブレンフィルタMFの気孔を塞いで目詰まりが生じてしまい易い。メンブレンフィルタMFに目詰まりが生じると、ろ過とは逆向きになる過剰分を吸引する際の液流を妨げてしまうが、プレフィルタPFを介することで、メンブレンフィルタMFに捕捉される微粒子を少なくして、メンブレンフィルタMFの目詰まりを生じ難くすることができる。そして、少なくとも湿潤状態で軟化するプレフィルタPFを用いることで、プレフィルタPFに捕捉された微粒子が、その気孔を塞いでしまっても、過剰分を吸引する際の液流に押されてプレフィルタPFが弾性変形し、捕捉された微粒子が解放され易く、その液流が妨げられないようにすることが可能なためであると考えられる。
また、図示する例において、プレフィルタPFは、メンブレンフィルタMFのろ過面側に離間して配置されているが、メンブレンフィルタMFに重ねて配置してもよい。
上記範囲に満たないと、ろ過流量が少なくなってしまい滴下性能を損ねてしまう傾向がみられる。上記範囲を超えると、プレフィルタPFを透過する微粒子が多くなってしまい、メンブレンフィルタMFの目詰まりによって吸引性能が損なわれてしまう傾向がみられる。
なお、圧縮応力は、圧縮変形率20~30%の範囲での圧縮応力とする。
図1に示す複式容器1において、容器本体2に平均粒径5μmのゼオライト480mgを収容し、副容器3に処理液(主成分:水酸化ナトリウム溶液)0.94mLを収容した。
また、フィルタ付き注出部材4が備えるフィルタFとして、下記メンブレンフィルタMFのろ過面側に、下記プレフィルタPFを配置した複合フィルタを用いた。
・メンブレンフィルタMF:メルク株式会社製「ミリポアエクスプレスプラス」(親水性PES製メンブレンフィルタ、平均孔径0.45μm)
・プレフィルタPF:アイオン株式会社製「ベルイータE(D)」(PVAスポンジ、湿潤時の平均気孔径130μm、同気孔率90%、同圧縮応力4.7kPa、保水率1100%、厚み2mm)
フィルタ付き注出部材4を装着して、容器本体2の内容物取り出し口23を開封した後に、注出口411を滴下容器7に挿入してろ液を滴下し、滴下開始から注入されたろ液の液位が滴下容器に表示した上位の液位線71(液量35μL)に達するまでの時間を測定した。五組の複式容器1について測定した平均値を表1に示す。
フィルタ付き注出部材4を装着して、容器本体2の内容物取り出し口23を開封した後に、注出口411を滴下容器7に挿入してろ液を滴下し、注入されたろ液が90μLになった時点で吸引操作を開始し、その時点から、ろ液の液位が滴下容器に表示した上位の液位線71(液量35μL)に達するまでの時間を測定した。五組の複式容器1について測定した平均値を表1に示す。
上記評価試験において、ろ液が注入された滴下容器7から任意に五つ選んで、それぞれのろ液について、波長596nmの吸光度を5mmセルで測定し、ろ過性能の評価試験を行った。その平均値を表1に示す。
プレフィルタPFに、有限会社イーグル化成製PVAスポンジ(湿潤時の平均気孔径130μm、同気孔率90%、同圧縮応力2.9kPa、保水率950%、厚み2mm)を用いた以外は実施例1と同様にして、滴下性能、吸引性能の評価試験を行った。
滴下性能、吸引性能については、それぞれ八組の複式容器1を用意して評価試験を行った。その結果を表1に示す。
プレフィルタPFに、株式会社エー・シーケミカル製「ACスポンジP」(PVAスポンジ、湿潤時の平均気孔径130μm、同気孔率90%、保水率1100%、厚み2mm)を用いた以外は実施例1と同様にして、滴下性能、吸引性能の評価試験を行った。
滴下性能、吸引性能については、それぞれ八組の複式容器1を用意して評価試験を行った。その結果を表1に示す。
プレフィルタPFに、アイオン株式会社製「ピオラスEVA」(エチレン-酢酸ビニル共重合体スポンジ、湿潤時の平均気孔径25μm、同気孔率77%、保水率340%、厚み1mm)を用いた以外は実施例1と同様にして、滴下性能、吸引性能の評価試験を行った。
滴下性能、吸引性能については、それぞれ三組の複式容器1を用意して評価試験を行った。その結果を表1に示す。
プレフィルタPFを用いずに、メンブレンフィルタMF単独とした以外は実施例1と同様にして、滴下性能、吸引性能、ろ過性能の評価試験を行った。
また、本発明に係るフィルタ付き注出部材は、懸濁液をろ過するフィルタFが、メンブレンフィルタMFのろ過面側に、少なくとも湿潤状態で軟化する連続多孔質フォームからなるプレフィルタPFを配置した複合フィルタであればよく、これ以外の事項は、前述した実施形態に限定されることなく適宜変更することができる。前述した実施形態で説明した事項を適宜取捨選択して組み合わせることもできる。
7 滴下容器
F フィルタ
MF メンブレンフィルタ
PF プレフィルタ
Claims (7)
- 懸濁液をろ過しつつ、ろ液を滴下容器に滴下し、滴下量が過剰なときには過剰分を吸引可能として、一定量のろ液を前記滴下容器に注入するためのフィルタ付き注出部材であって、
前記懸濁液をろ過するフィルタが、メンブレンフィルタのろ過面側に、少なくとも湿潤状態で軟化する連続多孔質フォームからなるプレフィルタを配置した複合フィルタであることを特徴とするフィルタ付き注出部材。 - 前記プレフィルタが、湿潤状態において、平均気孔径が130~180μmである請求項1に記載のフィルタ付き注出部材。
- 前記プレフィルタが、湿潤状態において、気孔率が89~91%である請求項1又は2に記載のフィルタ付き注出部材。
- 前記プレフィルタが、湿潤状態において、圧縮応力が2.9~6.3kPaである請求項1~3のいずれか一項に記載のフィルタ付き注出部材。
- 前記プレフィルタの保水率が、850%以上である請求項1~4のいずれか一項に記載のフィルタ付き注出部材。
- 前記プレフィルタが、PVAスポンジである請求項1~5のいずれか一項に記載のフィルタ付き注出部材。
- 前記メンブレンフィルタが、親水性メンブレンフィルタである請求項1~6のいずれか一項に記載のフィルタ付き注出部材。
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