DE10322893A1 - Equipment for microtechnological structuring of fluids used in analytical or combinatorial biology or chemistry, has dosing, splitting and fusion devices in fluid pathway - Google Patents
Equipment for microtechnological structuring of fluids used in analytical or combinatorial biology or chemistry, has dosing, splitting and fusion devices in fluid pathway Download PDFInfo
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- DE10322893A1 DE10322893A1 DE2003122893 DE10322893A DE10322893A1 DE 10322893 A1 DE10322893 A1 DE 10322893A1 DE 2003122893 DE2003122893 DE 2003122893 DE 10322893 A DE10322893 A DE 10322893A DE 10322893 A1 DE10322893 A1 DE 10322893A1
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Classifications
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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
- B01L3/50273—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 characterised by the means or forces applied to move the fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7174—Feed mechanisms characterised by the means for feeding the components to the mixer using pistons, plungers or syringes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/30—Micromixers
- B01F33/302—Micromixers the materials to be mixed flowing in the form of droplets
- B01F33/3021—Micromixers the materials to be mixed flowing in the form of droplets the components to be mixed being combined in a single independent droplet, e.g. these droplets being divided by a non-miscible fluid or consisting of independent droplets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/712—Feed mechanisms for feeding fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B01L3/502738—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 characterised by integrated valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B01L3/502769—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 characterised by multiphase flow arrangements
- B01L3/502784—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 characterised by multiphase flow arrangements specially adapted for droplet or plug flow, e.g. digital microfluidics
-
- 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
- G01N35/08—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a stream of discrete samples flowing along a tube system, e.g. flow injection analysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/06—Fluid handling related problems
- B01L2200/0605—Metering of fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
- B01L2300/0864—Configuration of multiple channels and/or chambers in a single devices comprising only one inlet and multiple receiving wells, e.g. for separation, splitting
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- B01L2300/08—Geometry, shape and general structure
- B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
- B01L2300/0867—Multiple inlets and one sample wells, e.g. mixing, dilution
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01L2300/161—Control and use of surface tension forces, e.g. hydrophobic, hydrophilic
- B01L2300/165—Specific details about hydrophobic, oleophobic surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B01L3/502715—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 characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
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- 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
- B01L3/502761—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 specially adapted for handling suspended solids or molecules independently from the bulk fluid flow, e.g. for trapping or sorting beads, for physically stretching molecules
Abstract
Description
Gegenstand der Erfindung ist eine Vorrichtung und ein Verfahren zum Zudosieren von Flüssigkeiten zu einem oder einer Mehrzahl von in ein Separationsmedium eingebetteten Flüssigkeitskompartimenten mit dem Ziel der Analyse von Inhaltskomponenten in den eingebetteten Testflüssigkeitskompartimenten bzw. deren zeitlicher Änderung in Folge des Zudosierens der Prozessflüssigkeiten.object the invention is an apparatus and a method for metering of liquids too one or a plurality of embedded in a separation medium fluid compartments with the aim of analyzing content components in the embedded Testflüssigkeitskompartimenten or their change over time as a result of the process fluids being added.
Im Rahmen von Hochdurchsatzverfahren ist es erforderlich, eine Vielzahl von Proben unter vergleichbaren und reproduzierbaren Bedingungnen mit A) einer Vielzahl von Testsubstanzen und B) einer relativ begrenzten Anzahl unterschiedlicher Prozessflüssigkeiten nach einem definierten Zeitprotokoll zu versetzen und der analytischen Bewertung zuzuführen.in the Under high throughput processes, there is a need for a variety samples under comparable and reproducible conditions with A) a large number of test substances and B) a relatively limited one Number of different process liquids according to a defined one Moving the time record and adding it to the analytical evaluation.
Klassischer Ansatz zur Bewältigung dieser Vielfalt ist die Anordnung der Proben in Arrayform und die Nutzung automatisierter Verfahren zum parallelen Prozessieren der Proben, wie z. B. paralleler Flüssigkeitsübertrag unter Verwendung von hochparallelen Pipettierköpfen, Nadel- oder Spritzenarrays, zeitsynchrones Auslesen aller Proben mit Hilfe von Kamera-basierten Detektoranordnungen und parallele programmierte Inkubation unter Verwendung von Stacker-Systemen.classic Approach to coping This diversity is the arrangement of the samples in array form and the use automated process for parallel processing of samples, such as B. parallel liquid transfer using highly parallel pipetting heads, needle or syringe arrays, time-synchronous reading of all samples with the help of camera-based Detector arrays and parallel programmed incubation under Use of stacker systems.
Als alternativer Ansatz rückt in zunehmenden Maße die Nutzung serieller Probenströme in fluidischen Leitbahnen in den Blickpunkt des Interesses.As alternative approach is coming increasingly the use of serial sample streams in fluidic channels in the focus of interest.
Die zugrundeliegende Strategie, welche seit den 20er Jahren des vergangenen Jahrhunderts mit der Einführung des Fließbandes in Fertigungsprozesse ihre Leistungsfähigkeit in produktiven Umgebungen demonstriert, ermöglicht das kontinuierliche Prozessieren einer als Probenstrom organisierten Vielzahl von Proben in seriellen Verfahren. Neben dem Managment von Flüssigkeitstropfen auf Oberflächen oder zwischen Glasplatten unter Verwendung von Gasen oder nicht mit Probenflüssigkeit mischbaren Separationsmedien werden Ansätze zu Führung derartiger Probenströme in Mikrokapillaren unter Trennung der Probenkompartimente durch ein mit der Probenflüssigkeit nicht mischbares Separationsmedium diskutiert, welche gleichzeitig die Förderung des Probenstromes durch das Kanalsystem mit Hilfe von Pumpen ermöglicht.The underlying strategy, which has been used since the 1920s Century with the introduction of the assembly line in manufacturing processes their performance in productive environments demonstrates, enables the continuous processing of one organized as a sample stream Large number of samples in serial processes. In addition to management of liquid drops on surfaces or between glass plates using gases or not with sample liquid Miscible separation media are approaches for guiding such sample streams in microcapillaries with the sample compartments separated by a sample liquid immiscible separation medium discussed, which simultaneously the advancement of the sample flow through the channel system using pumps.
Erste
Ansätze
und systematische Untersuchungen zur Erzeugung und Einbettung derartiger Probenströme in Kapillarsysteme
unter kontrollierten Bedingungen sind publiziert – jedoch
ist das Problem des Zudosierens von Reagenzien zu den die Probenflüssigkeit
enthaltenden, in Kapillaren geführten
Kompartimenten (
Der erfindungsgemäßen Vorrichtung und dem Verfahren kommt die Aufgabe zu, das kontrollierte Zudosieren von Inhaltsstoffe enthaltenden Flüssigkeiten zu individuellen Kompartimenten oder Kompartimentfolgen zu ermöglichen und damit für die oben beschriebenen seriellen Verfahren für Hochdurchsatzverfahren zu erschließen.The device according to the invention and the process has the task of controlled dosing from ingredient-containing liquids to individual To enable compartments or compartment sequences and thus for the above to develop described serial methods for high-throughput methods.
Die
Lösung
dieser Aufgabenstellung eröffnet
einerseits den Zugang zur Erzeugung von Probenströmen mit
einer Vielzahl von in unterschiedlichen Kompartimenten (
Neben zellulären Objekten ist auch die Einbettung von Festkörperpartikeln mit speziellen Funktionseigenschaften als Inhaltsstoffe in die Kompartimente möglich.Next cellular Objects are also the embedding of solid particles with special Functional properties possible as ingredients in the compartments.
Auf der anderen Seite ermöglicht die Einbettung von Inhaltsstoffen, bestehend aus oberflächenfunktionalisierten Funktionspartikeln auf der Basis organischer Polymere, Komposite oder anorganischer Feststoffe bzw. funktionalisierter Hydrogel-Partikel die Übertragung der auf diesen Partikeln lokalisierten chemischen, biochemischen oder biologischen Vielfalt auf die Flüssigkeitskompartimente.On the other hand, the embedding of ingredients, consisting of surface-functionalized functional particles based on organic polymers, composites or inorganic solids or functionalized hydrogel particles, enables the transfer of the chemical, bi ochemical or biological diversity on the liquid compartments.
Durch Einbettung magnetischer Mikropartikel in die Kompartimente werden eine magnetkraft-basierte Förderung der Kompartimente im Kanal sowie magnetkraft-vermittelte Sortierverfahren ermöglicht. Durch magnet-basierte Positionierung von Kompartimenten im Bereich der Einmündung von Kanälen in den Hauptkanal können solche temporär verschlossen werden.By Magnetic microparticles are embedded in the compartments a magnetic force-based funding of the compartments in the channel as well as sorting methods mediated by magnetic force allows. Through magnet-based positioning of compartments in the area the confluence of channels can in the main channel such temporary be closed.
Erfindungsgemäß wird dies entsprechend den Merkmalen des Anspruchs 1 erreicht. Das zentrale Element der Vorrichtung ist eine Anordnung, welche vorzugsweise als Mikrochip realisiert ist.According to the invention achieved according to the features of claim 1. The central Element of the device is an arrangement, which is preferred is implemented as a microchip.
Zentrales
funktionelles Element ist ein Mikrokanal (
Der
Ablauf des Zudosierens ist in
Bei
kontinuierlicher Förderung
einer Sequenz (
Der definiert erfolgende Tropfenabriss bildet die Voraussetzung für eine hohe Reproduzierbarkeit und Genauigkeit des zudosierten Volumens und bestimmt somit die Prozessicherheit des Dosierverfahrens.The Defined drop tear-off forms the prerequisite for a high Reproducibility and accuracy of the metered volume and thus determines the process reliability of the dosing process.
Der
für den
kontrollierten Abriss des Fluidkompartimentes zu leistende Energieeintrag
entspricht der Summe der für
die Erzeugung der neuen Grenzflächen
zu erbringenden Grenzflächenenergie
im Bereich der Einmündung
des Mikrokanals (
Demgemäß erfolgt
der Abriss dann definiert und mit minimalen Energieaufwand, wenn
die sich ausbildende Phasengrenze beim Abriss genau an der Einmündung des
Mikrokanals (
Der
störungsfreie
Ablauf dieses Prozesses wird durch die erfindungsgemäße Anordnung
und die erfindungsgemäße Abstimmung
der Dimensionen der Mikrokanäle, Öffnungsweiten
der Einmündung,
Benetzungseigenschaften der Oberflächen für die bezeichneten Flüssigkeiten
sowie die vorzugsweise Ausformung der Einmündung als scharfkantig begrenzte
Verengung des Mikrokanals (
Im
Gegensatz zum Stand der Technik bei der Erzeugung und Einbettung
von Fluidkompartimenten in ein Separationsmedium, bei welchen die
Phasengrenze aufgrund mangelhafter Abstimmung von Benetzungseigenschaften
und Geometrie der Einmündung
beim Abriss in den Mikrokanal (
Für eine sichere
Prozessführung
ist die Einhaltung folgender Kriterien, die das Benetzungsverhalten der
inneren Oberflächen
im Bereich der Einmündung
des Mikrokanals (
Erfindungsgemäß muß der Kontaktwinkel
(
für
das System Testflüssigkeit
(
für das System
Prozessflüssigkeit
(
und
für das
System Separationsmedium (
für das System
Separationsmedium (
for the test liquid system (
for the process liquid system (
and for the system separation medium (
for the system separation medium (
Die
individuelle Dosierung von Substanzen zu individuellen und definierten
Kompartimenten, einer Serie von Kompartimenten in Verbindung mit
der Verwendung einer Ein- oder Mehrzahl von Mikrokanälen (
Erfindungsgemäß wird dies
dadurch erreicht, daß durch
Umkehr der Förderrichtung
der betreffenden Prozessflüssigkeit
in den zugehörigen
Mikrokanal (
Verfahren zur Bestimmung des Säuregehaltes in Flüssigkeitskompartimenten mittels Titrationsanalysemethod to determine the acidity in liquid compartments using titration analysis
Versuchsaufbau und Beschreibung der Komponentenexperimental setup and description of the components
Für den Versuch
wird eine Anordnung gemäß
Eine
zweite Spritze, welche die Testflüssigkeit (
Eine
1-ml-Spritze, befüllt
mit Prozessflüssigkeit
(
Breite des Mikrokanals
(
Microchannel width (
Zur
Verbindung der Chips wurden Kapillaren aus PTFE verwendet. Die Oberflächen der
Chipmodule, hergestellt aus Glas, wurden mit einem Gemisch aus 25
Vol% Wasserstoffperoxid und 75 Vol% Schwefelsäure aktiviert, mit Wasser gewaschen,
im Trockenschrank bei 120 °C
getrocknet und in einer Lösung
von 2 mM Oktadecyltrichlorsilan in wasserfreiem Toluol 3 h bei Raumtemperatur
umgesetzt und mit Toluol und nachfolgend Äthanol gespült. Der an einer identisch
gespülten
Glasoberfläche
bestimmte Kontaktwinkel für
das System Wasser/Tetradekan/Oberfläche gemäß
VersuchsdurchführungExperimental Procedure
In
einem Mikrokanal (
Die
Kalibrierung des Kompartimentvolumens erfolgt auf Grundlage der
im Vorfeld ermittelten Abhängigkeit
des Kompartimentvolumens von der Flussrate für den im Experiment eingesetzten
Chip. Diese ist als Box&Whisker-Plot
in
Der
Mikrokanal (
Beginnend mit einer Förderrate von 0,05 ml/h erfolgt die schrittweise Erhöhung der Förderrate in Schritten von je 0,1ml. Der Äquivalenzpunkt ist erkennbar an einem Farbumschlag des der Salzsäure beigefügten Indikators Bromophenolblau nach blau und wird mit einer CCD- Kamera und vorgeschaltetem Interferenzfilter im Wellenlängenbereich 575 bis 625 nm detektiert. Bei einer Förderrate von 0,1 ml/h wird der Farbumschlag bei 32 von 50 Kompartimenten (64 %) beobachtet, bei einer Förderrate von 0,11 ml/h erfolgt der Farbumschlag bei 50 der 50 beobachteten Kompartimente (100%).beginning with a funding rate From 0.05 ml / h, the delivery rate is gradually increased in steps of each 0.1 ml. The equivalence point is recognizable by the color change of the indicator added to the hydrochloric acid Bromophenol blue to blue and is with a CCD camera and upstream interference filter in the wavelength range 575 to 625 nm detected. At a delivery rate of 0.1 ml / h the color change was observed in 32 out of 50 compartments (64%), at a funding rate The color change of 0.11 ml / h occurs in 50 of the 50 observed Compartments (100%).
Ergbnis und DiskussionResult and discussion
Die Versuchsanordnung und das Verfahren ermöglichen die Ermittlung der Säurekonzentration in Mikrokompartimenten durch Titrationsanalyse unter Einsatz der erfindungsgemäßen Anordnung und des erfindungsgemäßen Verfahrens und stellen somit eine Möglichkeit zur Nutzung des Verfahrens zur Bestimmung von Inhaltsstoffen von in Separationsmedium eingebetteten Kompartimenten dar. Aufgrund von statistischen Schwankungen des Volumens der erzeugten Kompartimente wird am Equivalenzpunkt nicht bei allen Flüssigkeitskompartimenten der Farbumschlag beobachtet. Nach Übertitrieren über den Equivalenzpunkt hinaus wird der Farbumschlag bei allen Kompartimenten beobachtet.The Experimental arrangement and the method enable the determination of the acid concentration in microcompartments by titration analysis using the arrangement according to the invention and the method according to the invention and thus represent an opportunity to use the procedure for the determination of ingredients of compartments embedded in separation medium. Due to of statistical fluctuations in the volume of the compartments produced is not the same for all liquid compartments at the equivalence point Color change observed. After overtitration via the Equivalence point is the color change in all compartments observed.
Das Verfahren wurde analog zur Bestimmung der Zitronensäurekonzentration durch Titration gegen Natronlauge eingesetzt.The The procedure was analogous to determining the citric acid concentration used by titration against sodium hydroxide solution.
Zuordnungstabelle für Abbildungen Mapping table for images
Claims (42)
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DE2003122893 DE10322893A1 (en) | 2003-05-19 | 2003-05-19 | Equipment for microtechnological structuring of fluids used in analytical or combinatorial biology or chemistry, has dosing, splitting and fusion devices in fluid pathway |
DE112004001376T DE112004001376D2 (en) | 2003-05-19 | 2004-05-18 | Apparatus and method for structuring liquids and for metering reaction liquids to liquid compartments embedded in separation medium |
PCT/DE2004/001056 WO2004103565A2 (en) | 2003-05-19 | 2004-05-18 | Device and method for structuring liquids and for dosing reaction liquids into liquid compartments immersed in a separation medium |
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