EP1255987A1 - Vorrichtung zur stoffanalyse mittels dünnschichtchromatographie - Google Patents
Vorrichtung zur stoffanalyse mittels dünnschichtchromatographieInfo
- Publication number
- EP1255987A1 EP1255987A1 EP01901104A EP01901104A EP1255987A1 EP 1255987 A1 EP1255987 A1 EP 1255987A1 EP 01901104 A EP01901104 A EP 01901104A EP 01901104 A EP01901104 A EP 01901104A EP 1255987 A1 EP1255987 A1 EP 1255987A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- solvent
- thin
- plates
- analyzed
- substance
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/90—Plate chromatography, e.g. thin layer or paper chromatography
- G01N30/94—Development
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/90—Plate chromatography, e.g. thin layer or paper chromatography
- G01N30/91—Application of the sample
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/90—Plate chromatography, e.g. thin layer or paper chromatography
- G01N30/94—Development
- G01N2030/945—Application of reagents to undeveloped plate
Definitions
- the present invention relates to a device for substance analysis by means of thin layer chromatography, as defined in the preamble of independent claim 1.
- the substance to be analyzed is dripped or applied onto a thin layer plate, a support plate and a thin layer of a functional substance arranged thereon, for example silica gel, C 13 , C 8 , C 4 , C 2 , C S H 5 , NH 2 , A1 2 0 3 , paper (cellulose), starch, etc., has.
- a functional substance for example silica gel, C 13 , C 8 , C 4 , C 2 , C S H 5 , NH 2 , A1 2 0 3 , paper (cellulose), starch, etc.
- the thin-layer plate is then placed in a suitable solvent or generally a mixture of solvents, for example hexane, hexane and ethyl acetate in a ratio of 1: 2, cyclohexane and dichloroethane in a ratio of 2: 1, etc., which, owing to the Capillarity of the thin layer migrates upwards and takes the dripped or applied substance to be analyzed or, if necessary, various components thereof upwards. Since different substances or components migrate upwards at different distances, the substance or components can be inferred from this, in particular if a reference substance has also been applied.
- a suitable solvent or generally a mixture of solvents for example hexane, hexane and ethyl acetate in a ratio of 1: 2, cyclohexane and dichloroethane in a ratio of 2: 1, etc.
- the hand analysis of thin-layer chromatography has the disadvantage that it is relatively complex and requires the presence of a chemist or laboratory technician, which can be particularly problematic in that the upward migration of the solvent can take several hours and therefore the thin-layer plate may be in the middle of the Must be removed from the solvent tray at night so that the result image does not become blurred.
- the invention is based on the following object.
- a device for substance analysis by means of thin-layer chromatography of the type mentioned at the beginning is to be created, which enables the substance analysis to be carried out in a simplified, automated manner.
- the essence of the invention is that a device for substance analysis by means of thin-layer chromatography, with a solvent trough that has at least one solvent channel, has means that make it possible to arrange a thin-layer plate at an angle to the horizontal in the solvent channel, so that the substance to be analyzed by can be dripped on or applied to the thin-layer plate from above and the solvent channel attached to a solvent.
- telzu Switzerlandstelle solvent can be supplied so that the upward migration of components of the substance to be analyzed can be started without having to change the position of the thin-layer plate.
- the thin-layer plate is arranged obliquely to the horizontal, its position does not have to be changed during the entire time, which simplifies the entire process sequence and allows it to be automated without great effort. Automation is also facilitated by the fact that the material to be analyzed can be supplied from above and can therefore be operated by commercial robots that can be moved in one or two horizontal and vertical directions. Since these robots generally also carry out steps for the upstream and downstream processes, it is of great advantage to also use them for substance analysis using thin-layer chromatography, which can also be carried out on-line.
- the solvent can also be supplied from above.
- the optimal angle ⁇ between the thin-film plate and the horizontal is between 40 ° and 50 °, preferably 45 °.
- the substance to be analyzed can simply be dripped on or applied from above and, on the other hand, the thin-layer plate can be suitably wetted in the lower part with solvent, which can migrate well upwards together with the substance or components to be analyzed.
- an angle ⁇ between 20 ° and 80 ° and even between 5 ° and 85 ° is suitable net, while an angle ⁇ less than 5 ° and greater than 1 ° or greater than 85 ° and less than 89 ° is less suitable, but is still possible.
- the solvent trough advantageously has two or more independent solvent channels, at least two thin-layer plates preferably being able to be arranged in a solvent channel. Ten or more solvent channels can also be implemented, each feeding a thin-layer plate with solvent. A variety of substances can then be analyzed with two or more different solvents.
- the or each solvent channel is inclined toward a solvent suction point, which preferably corresponds to the solvent supply point. This makes it possible not only to supply solvents at a single point, but also to suck them off again at a single, preferably the same point.
- the feeding process starts with the addition of the solvent, while it is ended with the removal of the solvent.
- the device according to the invention also has a tub cover which largely closes off the solvent channel or channels and the thin-layer plate or plates from the outside. In this way, a saturated atmosphere can be generated which prevents the solvent (s) from evaporating too quickly, in particular at a high vapor pressure at the analysis temperature.
- the trough cover advantageously has holes, slots or an open surface at the top, which allow the supply of solvent and the dripping or application of substances to be analyzed onto the thin-layer plate or plates through the trough cover, the holes, slots or the open area is preferably closed with septa or a septa plate. The substances and solvents to be analyzed can thus be supplied from above with the solvent pan covered, the septa or septa plates, if any, ensuring a tight cover.
- the device according to the invention also includes an addition device, which preferably comprises a hollow needle that can be moved vertically and in at least one horizontal direction, with which substances to be analyzed can be automatically dripped or applied onto the thin-layer plate or plates, and solvents can be supplied automatically at the solvent supply point or positions and can be suctioned off at the solvent suction point or points.
- the addition device enables automatic substance and solvent handling, so that after programming the control of the addition device, the entire process can be carried out without the intervention of a chemist or laboratory technician.
- the device according to the invention has a reagent matrix, which comprises receiving holes for reagent containers and through-holes between them, through which an addition and removal tool for adding and removing add analyzing substances and solvents is feasible.
- Reagent containers with substances to be analyzed can then simply be arranged in the receiving holes and for analysis a substance to be analyzed can be removed from the reagent container and applied through an addition hole to a thin-layer plate arranged underneath.
- Solvent is normally removed from separate, larger containers, but could also be added differently instead of using the addition and removal tool mentioned, for example by plucking, opening a valve, etc.
- means are provided for visualizing components of the substance to be analyzed which have migrated upward and which preferably comprise a UV lamp and / or means for spraying with chemical reagents.
- the analysis result can thus be made directly visible.
- the device according to the invention is also provided with means for determining the point in time at which existing solvent is to be removed from the solvent channel or channels, which preferably comprise a CCD camera.
- the optimum time for removing the solvent can thus be determined automatically and the solvent can then be removed automatically without the need for a chemist or laboratory technician to be present.
- the time for removing the solvent does not have to be preprogrammed, that is, estimated.
- FIG. 1 shows a sectional view of a first exemplary embodiment of the device according to the invention for substance analysis by means of thin-layer chromatography with two solvent channels;
- Figure 2 is a top view of the solvent pan of the device of Figure 1;
- Fig. 3 is a sectional view of the solvent pan along the line A-A in Fig. 2;
- FIG. 4 shows a sectional view of the solvent trough according to line B-B in FIG. 2 with wall plates mounted therein and thin-film plates arranged therein;
- Figure 5 is a top plan view of the tub cover of the device of Figure 1;
- Figure 6 is a side view of a wall plate of the device of Figure 1;
- Fig. 7 - a perspective view of the inventive
- Device with reagent matrix, reagent container and hollow needle shows a sectional view of a second exemplary embodiment of the device according to the invention for substance analysis by means of thin-layer chromatography with a single solvent channel;
- FIG. 9 shows a sectional view of a third exemplary embodiment of the device according to the invention for substance analysis by means of thin layer chromatography with two solvent channels;
- FIG. 10 shows a sectional view of a fourth exemplary embodiment of the device according to the invention for substance analysis by means of thin-layer chromatography with a solvent channel;
- FIG. 11 is a plan view of the solvent pan of the fourth embodiment.
- FIG. 13 shows a plan view of the tub cover of a sixth exemplary embodiment of the device according to the invention for substance analysis by means of thin-layer chromatography with two solvent channels and
- the illustrated first exemplary embodiment of a device according to the invention for substance analysis by means of thin-layer chromatography comprises a solvent trough 1 in which two wall plates 4 and 5 are mounted vertically by means of four setscrews 40 and 50 arranged in thread counters 41, 42, 51 and 52.
- the solvent v / anne 1 has for receiving the wall plates 4, 5 grooves 15 into which the wall plates 4, 5 are inserted.
- the wall plates 4, 5 each have a recess 41 into which the groove-free central area of the solvent trough 1 projects.
- the two wall plates 4, 5 are spaced apart from one another, so that an addition and removal tool, here a hollow needle 7, can be guided between them to solvent supply points 111 and 121.
- the solvent front 1 has two separate solvent channels 11 and 12, each of which is divided into two halves by a separating nose 13 and 14, respectively, and in which the solvent supply points 111, 121 are arranged.
- the solvent channels 11, 12 are supplied with solvent via these solvent supply points 111, 121, wherein different solvents can be supplied to the two solvent channels 11, 12. In the present exemplary embodiment, they also serve as solvent suction points. So that the solvent can be extracted as completely as possible, the solvent Tel channels 11, 12 inclined on the one hand at an angle ⁇ to the longitudinal central axis of the solvent trough 1 and on the other hand also to the transverse central axis, so that the solvent is fed to the solvent and suction points 111, 121 flows to.
- the angle of inclination of the thin-layer plates 2, 3, i.e. the angle ⁇ between the thin-layer plates 2, 3 and the horizontal is about 55 ° in the present case, which is a simple drop or application from above of the substance to be analyzed and a suitable wetting with solvent and good upward migration of the solvent together with the substance or components to be analyzed.
- a trough cover 6 which provides a seal to the outside, so that saturated atmospheres can arise on both sides of the two wall plates 4, 5, which evaporate the solvent too quickly on the thin-layer plates Prevent 2, 3.
- Two longitudinal ribs 64, 65 of the tub cover 6 engage between the two wall plates 4, 5 and thus fix the tub cover 6 in the lateral direction.
- the tub cover 6 has holes 62 and 63, which allow the insertion of the hollow needle 7, an addition device for adding solvent to the solvent supply points 111, 121, and holes 61, which insert the hollow needle 7 for dropping or applying Allow substances to be analyzed on thin-layer plates 2, 3.
- the holes 61, 62, 63 are preferably closed with septa or a septa plate.
- the solvent trough 1 with the thin-layer plates 2, 3 and the trough cover 6 can, for example, as shown in FIG. 7, be arranged in a frame 80 under a reagent matrix 8 which includes receiving holes 81 for reagent containers 9 and through-holes 82 between them. through which the hollow needle 7 for adding and removing substances and solvents to be analyzed can be guided.
- a commercially available robot which can be moved in one or two horizontal and vertical directions can be used as the feed device for guiding the hollow needle 7.
- a device according to the invention has, in addition to a tub cover 206, a solvent tub 201 with only one solvent channel 212, only one wall plate 205 fastened with grub screws 250 and normally only two thin-layer plates 203. Otherwise, what has been said about the first embodiment applies accordingly.
- a tub cover 306 and a solvent tub 301 are formed in this way and two wall plates 304, 305 are formed in pins 340, 350 in the solvent tank 301 so that the normally four thin-layer plates 302, 303 are parallel to one another. Otherwise, what has been said about the first embodiment applies accordingly.
- a device according to the invention in addition to a tub cover 406, a device according to the invention has a solvent tub 401 with a solvent channel 412, a wall plate 405 fastened with grub screws 450 and normally two thin-layer plates 403.
- a solvent supply and suction point 421 is arranged here in front of instead of behind the wall plate 405. Otherwise, what has been said about the first embodiment applies accordingly.
- a device according to the invention has a tub cover 506 with side walls which run approximately parallel to the thin-layer plates. Otherwise, what has been said about the first embodiment applies accordingly.
- a tub cover 606 has three slots 661, 662 instead of holes for the addition and removal tool, which are preferably closed with septa or septa plates. Otherwise, what has been said about the first embodiment applies accordingly. Seventh embodiment - FIG. 14
- a tub cover 706 has an open area 761 instead of holes for the addition and removal tool, which is preferably closed with a septa plate. Otherwise, what has been said about the first embodiment applies accordingly.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH294002000 | 2000-02-14 | ||
CH2942000 | 2000-02-14 | ||
PCT/CH2001/000066 WO2001059445A1 (de) | 2000-02-14 | 2001-01-29 | Vorrichtung zur stoffanalyse mittels dünnschichtchromatographie |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1255987A1 true EP1255987A1 (de) | 2002-11-13 |
Family
ID=4488433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01901104A Withdrawn EP1255987A1 (de) | 2000-02-14 | 2001-01-29 | Vorrichtung zur stoffanalyse mittels dünnschichtchromatographie |
Country Status (4)
Country | Link |
---|---|
US (1) | US6709584B2 (de) |
EP (1) | EP1255987A1 (de) |
AU (1) | AU2001226613A1 (de) |
WO (1) | WO2001059445A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200312122Y1 (ko) * | 2003-01-17 | 2003-05-09 | 카라반인터내셔날 주식회사 | 천막의 지주 |
CH715116A1 (de) * | 2018-06-21 | 2019-12-30 | Camag Chemie Erzeugnisse Und Adsorptionstechnik Ag | Verfahren und Vorrichtung zur automatischen Chromatographie von Dünnschichtplatten. |
US11221317B2 (en) * | 2018-10-29 | 2022-01-11 | Sorbent Technologies, Inc. | Development chambers for thin layer chromatography and methods of making and using the same |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1873800U (de) * | 1963-01-11 | 1963-06-12 | Euratom | Geraet zur kontrollierten befeuchtung und trocknung von duennschichtchromatographie-platten mittels eines trockenmittels, vorzugsweise schwefelsaeure verschiedener konzentrationen. |
US3327857A (en) * | 1966-10-12 | 1967-06-27 | Brinkmann Instr Inc | Chromatography apparatus |
FR1508183A (fr) * | 1966-11-14 | 1968-01-05 | Kodak Pathe | Nouveaux appareils d'analyse chromatographique et nouveau procédé d'analyse |
CH505636A (de) | 1968-03-13 | 1971-04-15 | Akad Wissenschaften Ddr | Trennkammer mit rundem Querschnitt für die aufsteigende, absteigende, horizontale und durchlaufende Dünnschicht-Chromatographie |
DE1810216B2 (de) * | 1968-11-21 | 1971-12-09 | Boehnnger Mannheim GmbH, 6800 Mannheim | Duennschichtchromatographiegeraet |
US3516546A (en) * | 1969-04-02 | 1970-06-23 | George W Clark | Chromatography apparatus |
US3919082A (en) * | 1971-05-13 | 1975-11-11 | Sandoz Ltd | Elution apparatus and method |
US3752316A (en) * | 1971-06-25 | 1973-08-14 | R Takeshita | Device for development in thin-layer chromatography |
US3738493A (en) * | 1971-09-24 | 1973-06-12 | Analytical Instr Spec | Apparatus for simultaneous application of samples to thin layer chromatography plates |
DE2327449A1 (de) | 1973-05-25 | 1974-12-12 | Weber Alfred | Beheizbare handauftrageeinrichtung fuer die duennschichtchromatographie |
US4272381A (en) * | 1979-10-22 | 1981-06-09 | Schleicher & Schuell, Inc. | Thin-layer chromatography spotting |
US4348286A (en) * | 1981-07-17 | 1982-09-07 | Analtech, Incorporated | Large sample thin layer chromatography |
JPS58113858A (ja) * | 1981-12-28 | 1983-07-06 | Shimadzu Corp | 薄層クロマトグラフイ−用自動展開装置 |
US4781892A (en) * | 1985-04-15 | 1988-11-01 | Exxon Chemicals Patents Inc. | Apparatus and method for determining fouling tendency of liquid hydrocarbons |
US4827780A (en) * | 1986-04-17 | 1989-05-09 | Helena Laboratories Corporation | Automatic pipetting apparatus |
DE4408172A1 (de) | 1994-03-11 | 1995-09-14 | Joerg Dipl Chem Redeker | UV-transparente Chromatographie-Entwicklungskammer |
US6264893B1 (en) * | 1998-04-13 | 2001-07-24 | Larry J. Markoski | Method and apparatus for developing thin layer chromatography plates for maximizing mobile phase conditions in column chromatography |
US6096205A (en) * | 1998-05-13 | 2000-08-01 | The Regents Of The University Of California | Hand portable thin-layer chromatography system |
US6303029B1 (en) * | 1999-10-25 | 2001-10-16 | Advanced Research And Technology | Arrangement and method for performing chromatography |
-
2001
- 2001-01-29 US US10/182,551 patent/US6709584B2/en not_active Expired - Lifetime
- 2001-01-29 AU AU2001226613A patent/AU2001226613A1/en not_active Abandoned
- 2001-01-29 EP EP01901104A patent/EP1255987A1/de not_active Withdrawn
- 2001-01-29 WO PCT/CH2001/000066 patent/WO2001059445A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO0159445A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2001226613A1 (en) | 2001-08-20 |
US20030013187A1 (en) | 2003-01-16 |
WO2001059445A1 (de) | 2001-08-16 |
US6709584B2 (en) | 2004-03-23 |
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Legal Events
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: JABLONSKI, PHILIPPE Inventor name: MUNCH, SERAPHIN Inventor name: SCHROEER, JOSEF Inventor name: GUELLER, ROLF |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CHEMSPEED TECHNOLOGIES AG |
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Effective date: 20081016 |