EP1261425A1 - Testsystem auf basis von mikrokapillaren - Google Patents
Testsystem auf basis von mikrokapillarenInfo
- Publication number
- EP1261425A1 EP1261425A1 EP01915235A EP01915235A EP1261425A1 EP 1261425 A1 EP1261425 A1 EP 1261425A1 EP 01915235 A EP01915235 A EP 01915235A EP 01915235 A EP01915235 A EP 01915235A EP 1261425 A1 EP1261425 A1 EP 1261425A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microcapillary
- test
- microcapillaries
- columns
- capillary
- 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- Withdrawn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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0809—Geometry, shape and general structure rectangular shaped
- B01L2300/0825—Test strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0832—Geometry, shape and general structure cylindrical, tube shaped
- B01L2300/0838—Capillaries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
- B01L2400/0406—Moving fluids with specific forces or mechanical means specific forces capillary forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N2035/00178—Special arrangements of analysers
- G01N2035/00237—Handling microquantities of analyte, e.g. microvalves, capillary networks
Definitions
- the present invention relates to a test system based on microcapillaries for determining a component in a liquid sample, preferably one
- sample liquid for example whole blood or interstitial tissue fluid
- capillary as used for example in chromatography
- biosensors based on electrochemical detection reactions and test strips based on membranes in which color reactions are evaluated by reflectometry.
- biosensors that suck in the patient's blood via so-called "sip in” mechanisms are particularly favorable.
- the entire electrode compartment in the electrochemical sensors (see, for example, USP 5 759 364) must be covered with blood, for which purpose at least 3 ⁇ l blood or more are generally required for the products known hitherto.
- blood for membrane-based test strips (e.g. USP 5 453 360) that are evaluated by reflectometry, even higher amounts of blood are usually required.
- the electrochemical biosensors involve the application of an enzyme / mediator formulation, for example by screen printing or micropipetting to the sensor electrode compartment.
- microporous membranes are soaked or coated with enzyme / indicator formulations.
- Microcapillaries in numerous variations are already known from chromatography, in particular gas chromatography (GC), see e.g. B. "Making and Manipulating Capillary Columns for Gas Chromatography” by Kurt Grob, Huething Verlag, 1986.
- GC gas chromatography
- Microcapillary columns which are used for example in chromatography, have made significant progress with regard to the above. Target criteria can be achieved.
- the invention therefore relates to the use of microcapillaries in test systems for taking samples by capillary forces.
- the invention also relates to test systems for liquid samples in which the analyte is taken up via a microcapillary. Sampling and detection of the analyte preferably take place in the microcapillary.
- the test systems according to the invention have the advantage that the sample liquid cannot come into contact with binders or adhesives of the test format.
- Suitable microcapillaries are known in particular from gas chromatography.
- Such gas chromatography (GC) microcapillary columns meet both in terms of
- Capillary geometry as well as coating the inside of the capillary with reagents e.g. polyethylene glycols for hydrophilic stationary phases or polysiloxanes for hydrophobic stationary phases, a high standard in terms of reproducibility and precision.
- reagents e.g. polyethylene glycols for hydrophilic stationary phases or polysiloxanes for hydrophobic stationary phases, a high standard in terms of reproducibility and precision.
- Suitable microcapillaries are also known from capillary electrophoresis.
- the dimensions and material properties of the microcapillaries used according to the invention are such that they draw in an essentially aqueous sample liquid by capillary forces.
- the aspirated sample volume is preferably less than 3 ⁇ l, particularly preferably less than 1 ⁇ l, very particularly preferably 0.5 ⁇ l or less.
- the microcapillaries used according to the invention preferably have a round cross section.
- the inner diameter of the micro capillaries is preferably less than 500 ⁇ m, particularly preferably less than 250 ⁇ m, very particularly preferably
- the length of the microcapillary used is preferably up to 2 cm, particularly preferably up to 1 cm, very particularly preferably approximately 0.5 cm.
- microcapillaries When using microcapillaries according to the invention, it is important, depending on the measuring principle used in each case, that the microcapillary contained in the respective test format sucks in a precisely defined sample volume; this applies in particular to determinations of the reaction end point, for example of enzymatic color reactions.
- GC or capillary electrophoresis columns have proven to be suitable for the purposes of the invention, the dimensions of which are usually such that even very small amounts of sample liquid, for example 0.5 ⁇ l blood or interstitial tissue fluid, are sufficient for a functional test with capillary lengths of 1 cm or less.
- the capillary columns according to the invention also meet the requirements for so-called “minimally invasive” test kits, which should be particularly advantageous for the patient, in particular painless.
- microcapillaries consist of a suitable material which is inert under the respective conditions.
- suitable material examples include quartz glass, normal glass and metal, such as Steel.
- the microcapillaries have an inner coating, which is also called the stationary phase in chromatography. Numerous materials are possible for this coating, which are known in principle from the GC columns. Suitable hydrophilic materials such as polyethylene glycols of various molecular weights (Carbowax ®), polyethylene glycol derivatives, for example. Carbowax monostearate 4000th Further hydrophilic stationary phases can be produced from
- Polyethyleneimine, polypropylene glycol or cyclodextrins Polyethyleneimine, polypropylene glycol or cyclodextrins.
- Hydrophobic materials are also suitable for the internal coating with regard to lipophilic stationary phases, with siloxane polymers or siloxane copolymers being the most common.
- siloxane polymers or siloxane copolymers being the most common. Examples are dimethylpolysiloxanes, (50% cyanopropyl) methylpolysiloxanes, (50% trifluoropropyl) methylpolysiloxanes or 5% phenylpolycarborane polysiloxanes
- PLOT columns Physical Layer Open Tubular
- microcapillaries in the sense of this invention.
- PLOT columns for example, aluminum oxide, silica gel, molecular sieve or porous polymers are used as stationary phases.
- microcapillary columns that are suitable for the test elements according to the invention are capillary electrophoresis columns, which are also available with very small inner diameters of, for example, 25 ⁇ m.
- the conventional capillary columns usually consist of the aforementioned quartz (fused silica).
- the glass columns previously used have lost much of their importance in chromatography, but are of great importance for the test elements according to the invention because of their excellent transparency.
- the quartz columns are usually provided with a yellow / brown high-temperature-resistant polymide layer on the outside. This removes the brittleness of the quartz capillary and creates flexible systems that are easy to handle.
- test elements according to the invention is more particularly with colorimetric
- microcapillaries as an essential component for the test kits according to the invention is their ability to suck in whole blood or other test liquids with the help of capillary forces.
- Suitable surfactants are ionic, for example SDS, zwitterionic, for example phospholipids and non-ionic, for example Pluronic R or fluorosurfactants (for example Bayowet
- the sample liquid is usually an essentially aqueous liquid, in particular a body liquid.
- a sample liquid is usually an essentially aqueous liquid, in particular a body liquid. Examples are urine, interstitial tissue fluid and blood.
- Typical analytes that can be determined are, for example, glucose, bilirubin, ketones, pH, proteins and cholesterol.
- the detection reagents are preferably in the inner coating of the
- Microcapillary (stationary phase) included.
- the measurement is usually made through the microcapillary wall, e.g. colorimetry.
- the systems established in diagnostics can be used, e.g. Detection via enzymatic or non-enzymatic color reactions or by electrochemical means, where
- Color reactions in particular enzymatic color reactions, are preferred. So for example, there are various enzymatically controlled color reactions for the quantitative detection of blood sugar to choose from, with oxygen-independent enzyme reactions being preferred for the capillary test kits described here.
- glucose detection for example, the glucose dehydrogenase system or the hexokinase system with tetrazolium indicators can be used.
- the appropriate reagents can be incorporated either via the recipes for the stationary phases, by subsequent coating on the stationary phases, or by combining these variants.
- test reaction can either be heterogeneous, i.e. in the stationary phase, or the detection reagents incorporated in the stationary phase can dissolve in the sample liquid, a homogeneous reaction then taking place in the liquid phase, which can be monitored colorimetrically.
- the color reaction can be evaluated, in particular when using PLOT columns, for example with aluminum oxide as the stationary phase, via refiection or with a transparent capillary system, for example GC columns with Polywax as the stationary phase, in transmission, with either the reaction kinetics or the reaction end point being determined can be.
- PLOT columns for example with aluminum oxide as the stationary phase
- a transparent capillary system for example GC columns with Polywax as the stationary phase
- the transmission measurement of the color reaction can also be carried out in the
- test formats are in principle familiar to the person skilled in the art. Those are preferred Formats that allow an optical evaluation of an enzymatic color reaction taking place in the microcapillary.
- test strip format was produced with the help of polymer films and double-sided adhesive tapes, which also applies to the following
- Fig. 1 shows the cross section of a microcapillary test format with cover film (1), spacer film (2), double-sided adhesive tape (3), microcapillary (4) and base film (5).
- Fig. 2 shows a microcapillary test format in a top view.
- test strip can also be constructed in such a way that there is no film or film at the point where it is photometrically evaluated
- Adhesive tapes are present.
- the top cover film can be transparent so that the filling process of the capillary can be observed.
- the same goal namely the registration of the complete filling of the capillary with sample liquid, can also be achieved by using filler-containing (white) cover films which have a cutout at the end of the capillary column as a viewing window.
- test arrays can be arranged vertically parallel to the geometry of microtiter plates, which, when immersed, sample liquids from the Aspirate individual microtiter plate compartments and trigger corresponding detection reactions.
- Example 1 Preparation of an enzyme / indicator formulation
- Methylthiazolyldiphenyl-tetrazolium bromide (Fluka 88415) Enzymes: glucose dehydrogenase (GDH 35U / mg)
- Phospholipon 90G Rhone Poulenc
- Microcapillary column HP-PLOT Al 2 O 3 "KCl” - deactivation 0.32 mm
- a 1 cm long, coated microcapillary piece (Polywax coated GC column from Macherey-Nagel 320 ⁇ m inner diameter) sucked whole blood in without any problems ( ⁇ 1 sec.)
- Each 1 cm long prepared capillary column was watered with the following
- the brown polyimide coating was flamed to evaluate the color reaction.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Dispersion Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Hematology (AREA)
- Clinical Laboratory Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Sampling And Sample Adjustment (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10008906 | 2000-02-25 | ||
DE10008906A DE10008906A1 (de) | 2000-02-25 | 2000-02-25 | Testsystem auf Basis von Mikrokapillaren |
PCT/EP2001/001566 WO2001062385A1 (de) | 2000-02-25 | 2001-02-13 | Testsystem auf basis von mikrokapillaren |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1261425A1 true EP1261425A1 (de) | 2002-12-04 |
Family
ID=7632404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01915235A Withdrawn EP1261425A1 (de) | 2000-02-25 | 2001-02-13 | Testsystem auf basis von mikrokapillaren |
Country Status (7)
Country | Link |
---|---|
US (1) | US20030013147A1 (de) |
EP (1) | EP1261425A1 (de) |
JP (1) | JP2003524164A (de) |
CN (1) | CN1411395A (de) |
AU (1) | AU2001242389A1 (de) |
DE (1) | DE10008906A1 (de) |
WO (1) | WO2001062385A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7776608B2 (en) | 2001-07-09 | 2010-08-17 | Bayer Healthcare Llc | Volume meter testing device and method of use |
DE10140680A1 (de) * | 2001-08-24 | 2003-03-06 | Bayer Ag | Spektroskopisches Testsystem auf Basis von Mikrokapillaren |
US7922883B2 (en) | 2005-06-08 | 2011-04-12 | Abbott Laboratories | Biosensors and methods of using the same |
US7905999B2 (en) * | 2005-06-08 | 2011-03-15 | Abbott Laboratories | Biosensor strips and methods of preparing same |
US7811430B2 (en) | 2006-02-28 | 2010-10-12 | Abbott Diabetes Care Inc. | Biosensors and methods of making |
KR100874221B1 (ko) | 2007-03-20 | 2008-12-15 | 주식회사 지니메디 | 체액 성분 측정 장치 |
EP2011630A1 (de) * | 2007-07-03 | 2009-01-07 | F. Hoffmann-La Roche AG | Verfahren zur Herstellung eines Analyseelementes |
EP2011629A1 (de) * | 2007-07-03 | 2009-01-07 | F. Hoffman-la Roche AG | Verfahren zur Herstellung eines mikrofluiden Systems auf einer Polymeroberfläche |
WO2014014587A2 (en) | 2012-07-16 | 2014-01-23 | Schlumberger Canada Limited | Capillary electrophoresis for reservoir fluid analysis at wellsite and laboratory |
US10767259B2 (en) | 2013-07-19 | 2020-09-08 | Agilent Technologies, Inc. | Components with an atomic layer deposition coating and methods of producing the same |
US20150024152A1 (en) * | 2013-07-19 | 2015-01-22 | Agilent Technologies, Inc. | Metal components with inert vapor phase coating on internal surfaces |
US10018590B2 (en) * | 2013-08-15 | 2018-07-10 | Schlumberger Technology Corporation | Capillary electrophoresis for subterranean applications |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5460996A (en) * | 1977-10-22 | 1979-05-16 | Mitsubishi Chem Ind | Method of measuring amount of sugar |
US4634679A (en) * | 1982-11-10 | 1987-01-06 | Becton Dickinson And Company | Method of determining adhesion of a liquid sample |
AU642444B2 (en) * | 1989-11-30 | 1993-10-21 | Mochida Pharmaceutical Co., Ltd. | Reaction vessel |
WO1996010170A1 (en) * | 1994-09-29 | 1996-04-04 | The Board Of Trustees Of The Leland Stanford Junior University | Capillary-based separation methods for identifying bioactive analytes in a mixture |
-
2000
- 2000-02-25 DE DE10008906A patent/DE10008906A1/de not_active Withdrawn
-
2001
- 2001-02-13 EP EP01915235A patent/EP1261425A1/de not_active Withdrawn
- 2001-02-13 CN CN01805399A patent/CN1411395A/zh active Pending
- 2001-02-13 AU AU2001242389A patent/AU2001242389A1/en not_active Abandoned
- 2001-02-13 WO PCT/EP2001/001566 patent/WO2001062385A1/de not_active Application Discontinuation
- 2001-02-13 US US10/203,369 patent/US20030013147A1/en not_active Abandoned
- 2001-02-13 JP JP2001561440A patent/JP2003524164A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO0162385A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10008906A1 (de) | 2001-08-30 |
JP2003524164A (ja) | 2003-08-12 |
WO2001062385A1 (de) | 2001-08-30 |
US20030013147A1 (en) | 2003-01-16 |
CN1411395A (zh) | 2003-04-16 |
AU2001242389A1 (en) | 2001-09-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2004200506B2 (en) | Method for Reducing Effect of Hematocrit on Measurement of an Analyte in Whole Blood, and Test Kit and Test Article Useful in the Method | |
JP3088789B2 (ja) | イオンのアッセイ法とその装置 | |
EP1254365B1 (de) | Elektrochemischer teststreifen zur verwendung bei der analyten-bestimmung | |
DE69727579T2 (de) | Trockenreagenz-Teststreifen mit einem Benzindinfarbstoff-Vorläufer und einer Antipyrinverbindung | |
AT407303B (de) | Verfahren zur qualitätskontrolle eines portablen analysensystems sowie flüssigkeit zur durchführung des verfahrens | |
CN105021596B (zh) | 基于浓度梯度的多层膜干化学检测试条 | |
JP2002510392A (ja) | 体液内分析物測定装置 | |
DE102006051448A1 (de) | Elektrochemischer Teststreifen für einen Biosensor mit mehreren Funktionen | |
JP2001518622A (ja) | 毛細管試薬キャリアーを用いた分析装置 | |
DE29924971U1 (de) | System zur Bestimmung eines Analyt | |
EP1989556A2 (de) | Ischämie-testverfahren | |
EP1261425A1 (de) | Testsystem auf basis von mikrokapillaren | |
EP1288647A2 (de) | Spektroskopisches Testsystem auf Basis von Mikrokapillaren | |
EP1259800B1 (de) | Enzymatisch-elektrochemische messeinrichtung | |
US20180355402A1 (en) | Diagnostic strip for determining the amount of sarcosine, creatinine and hydrogen peroxide in a biological or environmental sample | |
EP2243024B1 (de) | Einrichtung und verfahren zum nachweis von flüssigkeiten oder substanzen aus flüssigkeiten | |
WO1988009824A1 (en) | Improvements in diagnostic test strips | |
EP3404418A2 (de) | Diagnostischer streifen zur bestimmung der menge an sarkosin, kreatinin und wasserstoffperoxid in einer biologischen oder umweltprobe | |
EP0903410B1 (de) | Verfahren zum Nachweis und zur Bestimmung enzymatischer Reaktionen in Urin | |
RU2194278C2 (ru) | Тест-полоска для определения глюкозы | |
DE60316685T2 (de) | Behälter zur aufnahme von proben, der eine hydrophile membran zur abtrennung von partikeln enthält | |
AU2007231819B8 (en) | Electrochemical test strip for use in analyte determination | |
AU1802888A (en) | Improvements in diagnostic test strips | |
DD150508B1 (de) | Verfahren und enzymelektrode zur konzentrationsbestimmung von stoffwechselprodukten |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20020925 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17Q | First examination report despatched |
Effective date: 20031008 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BAYER TECHNOLOGY SERVICES GMBH |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB IT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20051101 |