EP0969917A1 - Procede et dispositif de mise en suspension de particules d'un solide dans un liquide - Google Patents
Procede et dispositif de mise en suspension de particules d'un solide dans un liquideInfo
- Publication number
- EP0969917A1 EP0969917A1 EP98917266A EP98917266A EP0969917A1 EP 0969917 A1 EP0969917 A1 EP 0969917A1 EP 98917266 A EP98917266 A EP 98917266A EP 98917266 A EP98917266 A EP 98917266A EP 0969917 A1 EP0969917 A1 EP 0969917A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- particles
- container
- volume
- deposit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
- B01F33/451—Magnetic mixers; Mixers with magnetically driven stirrers wherein the mixture is directly exposed to an electromagnetic field without use of a stirrer, e.g. for material comprising ferromagnetic particles or for molten metal
Definitions
- the present invention relates to the suspension of particles of a solid, in a predetermined volume of liquid, the particles and the volume of liquid being contained together inside a container itself delimited by a wall.
- the invention is concerned with the suspension, or resuspension of particles, forming a deposit adhering to the internal face of the wall of the container, in the form of a continuous film or of aggregates, and bringing together at least a portion of these particles in the agglomerated state, and this in a predetermined volume of the liquid, contained inside said container.
- particles / liquid defined above is encountered in particular during certain biological analyzes, using particles, of size at most equal to 10 ⁇ m, and preferably between 0.01 ⁇ m and 10 / / m, and for example between 1 and 5 // m, these particles comprising a magnetic substrate on which is fixed at least one analyte, or at least one reagent, and being dispersed in a continuous liquid phase, for example an aqueous phase .
- these particles under the effect of a magnetic field, from the liquid phase, leads in part to their accumulation and agglomeration in the form of a deposit, continuous or discontinuous, adhering to the internal face of the container wall.
- the method described above is specific to magnetic particles, and can only be implemented with such particles, because it is the conjunction of the rotational movement of said particles, generated by the rotating magnetic field, and the translational movement relative, alternative, between said field and the container, which detaches and disperses any deposit of magnetic particles liable to agglomerate on the internal face of the container.
- the present invention therefore relates to a process for suspending particles, from the physical state described or defined above, independent of the nature of the particles, and purely mechanical or hydrodynamic, without introducing into the container an additional quantity of liquid.
- the solution according to the invention also provides another advantage.
- the maximum height of the reflux flow obtained according to the present invention mechanically makes it possible to lick and loosen agglomerated particles on the internal face of the container, above the normal level.
- FIG. 1 shows schematically a container, in the physical state of its different phases before the application of the method according to the invention
- FIG. 3 shows schematically particles as used by the invention.
- - Figures 4, 5 and 6 respectively represent the influence of agitation on the signal values obtained for different types of particles (Fig. 4: Estapor particles, Fig. 5: Dynal particles, Fig. 6: Seradyn particles) .
- the measurement of the light signal is expressed in RLU ("Relative Light Unit").
- RLU Relative Light Unit
- the implementation of the present invention is independent of the magnetic nature or not of the particles.
- a treatment which consists in applying a magnetic field for example at the level of the lateral walls of the container 1 2 the particles are found, either completely gathered and agglomerated in the form of a deposit 4 adhering to the internal face 3a of the wall 3, that is to say partly dispersed within the volume of liquid and partly gathered and agglomerated in the form of a deposit 4 as described below. above.
- the particles 1 are, partly dispersed within the volume of liquid, and remain partly gathered and agglomerated in the form of a deposit 4 (continuous film or aggregates) adhering to the internal face 3a of the wall 3.
- a means 9 for securing the container and a means 10 for alternately moving the securing means 5, in a reference direction 6, for example vertical.
- This alternative displacement means can consist of a simple eccentric cooperating with the means 9 for securing the container.
- the container 1 2 is subjected to an alternating movement 5 in the reference direction 6, with a relatively large frequency, at least equal to 10 Hz, and one obtains or observes, within the predetermined volume of liquid, a flow / reflux 7 against the wall 3 of the container, on either side of the reference direction 6, breaking the deposit 4, and dispersing the particles 1 towards the center volume of liquid.
- a relatively large frequency at least equal to 10 Hz
- the predetermined volume 2 of liquid contains, homogeneously and completely dispersed, the particles 1, so that the analysis process can be continued.
- its amplitude is between 1 mm and 15 mm, preferably between 1 mm and 8 mm, and for example between 3 mm and 6 mm,
- the reciprocating movement has a frequency preferably between 1 5 Hz and 60 Hz, for example between 1 5 Hz and 30 Hz, for example, the preferred frequency is 1 6 Hz,
- the direction of the reciprocating movement is preferably vertical, that is to say perpendicular to the horizontal interface 2a of the predetermined volume of liquid; but the direction of the reciprocating movement optionally includes a vertical main component and a horizontal secondary component.
- Example: The present invention has been implemented in the context of a quantitative analysis of a pathogenic microorganism, namely Toxoplasma M (analyte), with magnetic particles coated with a ligand (antibody) specific for said microorganism.
- the particles are incubated in an analysis cuvette (container), with a sample or inoculum containing said microorganism. Then the particles which have reacted with said microorganism are separated by means of a magnetic field, bringing them together and fixing them against the wall of the bowl. The bowl is then emptied, then washed. A predetermined volume of a reagent (antibody labeled, for example by an enzyme such as alkaline phosphatase, directed against the analyte is then introduced and incubated in the cuvette, after removal of the magnetic field. After incubation and separation of the elements n ' having not reacted, a luminescent detection reagent is introduced into the cuvette and the light signal corresponding to the reagent having reacted with the particles is measured.
- a reagent antibody labeled, for example by an enzyme such as alkaline phosphatase
- the resuspension of the particles according to the method and the device of the invention facilitates the contact of the particles with the reactive entities (analyte and / or detection reagent), which results in an increase in the measured signal, for example the signal luminous.
- the implementation of the resuspension or resuspension according to the invention makes it possible to increase the measurement light signal by at least 60%, or even in certain cases of the order of 100%, according to the magnetic particles used, for example under the commercial references Estapor NH2-gluta, Dynal M280, and Seradyn. The results with and without stirring are presented below, respectively with each type of particles.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9704017 | 1997-03-27 | ||
FR9704017A FR2761277B1 (fr) | 1997-03-27 | 1997-03-27 | Procede et dispositif de mise en suspension de particules d'un solide dans un liquide |
PCT/FR1998/000639 WO1998043730A1 (fr) | 1997-03-27 | 1998-03-27 | Procede et dispositif de mise en suspension de particules d'un solide dans un liquide |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0969917A1 true EP0969917A1 (fr) | 2000-01-12 |
EP0969917B1 EP0969917B1 (fr) | 2002-01-16 |
Family
ID=9505443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98917266A Expired - Lifetime EP0969917B1 (fr) | 1997-03-27 | 1998-03-27 | Procede et dispositif de mise en suspension de particules d'un solide dans un liquide |
Country Status (10)
Country | Link |
---|---|
US (1) | US6390660B1 (fr) |
EP (1) | EP0969917B1 (fr) |
JP (1) | JP2001517149A (fr) |
AT (1) | ATE211946T1 (fr) |
AU (1) | AU7053198A (fr) |
CA (1) | CA2283687A1 (fr) |
DE (1) | DE69803166T2 (fr) |
ES (1) | ES2171017T3 (fr) |
FR (1) | FR2761277B1 (fr) |
WO (1) | WO1998043730A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6808304B2 (en) * | 2002-08-27 | 2004-10-26 | Dade Behring Inc. | Method for mixing liquid samples using a linear oscillation stroke |
US7258480B2 (en) * | 2005-01-10 | 2007-08-21 | Dade Behring Inc. | Apparatus for mixing liquid samples using a two dimensional stirring pattern |
EP2033715B1 (fr) * | 2007-08-14 | 2010-06-23 | Qiagen GmbH | Procédé destiné à suspendre ou resuspendre des particules dans une solution et dispositif adapté |
WO2018161204A1 (fr) * | 2017-03-06 | 2018-09-13 | 东北大学 | Agitateur de mélange fermé utilisant la résonance intermittente et procédé |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1417219A (en) * | 1921-08-22 | 1922-05-23 | Thomas H Warren | Autohemic therapy potentizer |
DE560885C (de) * | 1929-02-23 | 1932-10-08 | Martin Stuehler | Verfahren und Vorrichtung zum Herstellen von Betonkoerpern o. dgl. durch Ruetteln |
US1999671A (en) * | 1934-06-30 | 1935-04-30 | Hubert Van Bree | Amalgam mixer |
US2198637A (en) * | 1938-12-24 | 1940-04-30 | Submarine Signal Co | Apparatus for treating metals |
US2561027A (en) * | 1949-06-11 | 1951-07-17 | Velsicol Corp | Variable frequency vibrating device |
US2766881A (en) * | 1951-03-26 | 1956-10-16 | Research Corp | Acoustic separatory methods and apparatus |
DE1457328A1 (de) * | 1965-11-22 | 1969-10-23 | Abe Hershler | Verfahren und Vorrichtung zum Ruehren und Bewegen von stroemungsfaehigen Medien |
US3498384A (en) * | 1966-11-08 | 1970-03-03 | Chyugoku Kogyo Kk | Vibratory impact device |
US3587193A (en) * | 1968-12-04 | 1971-06-28 | E R Lewis | Rock polisher |
GB1330975A (en) * | 1971-11-05 | 1973-09-19 | N I Kt I Eamliro Vannogi Khim | Apparatus for carrying out physical and chamical processes in a vortex bed of ferromagnetic particles |
US3764116A (en) * | 1972-02-28 | 1973-10-09 | Branson Instr | Ultrasonic treatment apparatus |
US4085955A (en) * | 1976-11-22 | 1978-04-25 | Salle Donald A | Pen shaking device |
DE7817065U1 (de) * | 1978-06-07 | 1978-09-28 | Kerscher, Wolfgang, Ing.(Grad.), 8400 Regensburg | Schuettelmaschine, insbesondere fuer tuscheschreibgeraete |
DE3046157A1 (de) * | 1980-12-06 | 1982-07-22 | Deutsche Wurlitzer GmbH, 4971 Hüllhorst | Getraenke-selbstverkaufs-automat |
DE3233926A1 (de) * | 1981-09-14 | 1983-04-28 | Fuji Electric Corporate Research and Development, Ltd., Yokosuka, Kanagawa | Zerkleinerungs-, misch- oder ruehrvorrichtung |
JPS58158182A (ja) * | 1982-03-15 | 1983-09-20 | Olympus Optical Co Ltd | 培養細胞の剥離方法およびその装置 |
JPS6058235A (ja) * | 1983-09-07 | 1985-04-04 | Toshiba Corp | 撹拌方法および撹拌装置 |
US4610546A (en) * | 1984-12-31 | 1986-09-09 | Technicon Instruments Corporation | Apparatus and method for self-resonant vibrational mixing |
FR2600137B1 (fr) * | 1986-06-16 | 1990-06-22 | Pechiney Aluminium | Suspension pneumatique des vibrotasseuses utilisees en particulier pour la production de blocs carbones |
US4841848A (en) * | 1987-02-17 | 1989-06-27 | F. Korbel And Bros. | Method and apparatus for riddling wine in bottles |
US5272092A (en) * | 1987-11-12 | 1993-12-21 | Hitachi, Ltd. | Method for analyzing a reaction solution |
US4895453A (en) * | 1988-08-24 | 1990-01-23 | E. I. Du Pont De Nemours And Company | Vortex mixer drive |
JPH02256434A (ja) * | 1989-03-29 | 1990-10-17 | Nachi Fujikoshi Corp | 振動テーブル装置 |
US5203385A (en) * | 1992-03-31 | 1993-04-20 | Donald Waber | Apparatus and process for automatically reconstituting dry materials, especially pharmaceuticals |
JPH07111167B2 (ja) | 1992-04-22 | 1995-11-29 | 日産自動車株式会社 | 内燃機関の吸・排気弁リフト制御装置 |
US5273357A (en) * | 1992-11-27 | 1993-12-28 | Currie Susan M | Nail polish shaker apparatus |
US5833362A (en) * | 1997-05-06 | 1998-11-10 | Shepard; James | Beverage blender |
-
1997
- 1997-03-27 FR FR9704017A patent/FR2761277B1/fr not_active Expired - Fee Related
-
1998
- 1998-03-27 CA CA002283687A patent/CA2283687A1/fr not_active Abandoned
- 1998-03-27 EP EP98917266A patent/EP0969917B1/fr not_active Expired - Lifetime
- 1998-03-27 WO PCT/FR1998/000639 patent/WO1998043730A1/fr active IP Right Grant
- 1998-03-27 ES ES98917266T patent/ES2171017T3/es not_active Expired - Lifetime
- 1998-03-27 AT AT98917266T patent/ATE211946T1/de not_active IP Right Cessation
- 1998-03-27 DE DE69803166T patent/DE69803166T2/de not_active Expired - Fee Related
- 1998-03-27 AU AU70531/98A patent/AU7053198A/en not_active Abandoned
- 1998-03-27 US US09/381,796 patent/US6390660B1/en not_active Expired - Fee Related
- 1998-03-27 JP JP54124798A patent/JP2001517149A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9843730A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6390660B1 (en) | 2002-05-21 |
FR2761277A1 (fr) | 1998-10-02 |
ES2171017T3 (es) | 2002-08-16 |
FR2761277B1 (fr) | 2000-01-28 |
AU7053198A (en) | 1998-10-22 |
CA2283687A1 (fr) | 1998-10-08 |
WO1998043730A1 (fr) | 1998-10-08 |
DE69803166D1 (de) | 2002-02-21 |
ATE211946T1 (de) | 2002-02-15 |
DE69803166T2 (de) | 2002-08-29 |
JP2001517149A (ja) | 2001-10-02 |
EP0969917B1 (fr) | 2002-01-16 |
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