DE102008011578A1 - Photo-luminescence sensor for determining concentration of analyte in medium, has coloring carrier with photoluminescence coloring, where light source is provided for stimulating photoluminescence - Google Patents
Photo-luminescence sensor for determining concentration of analyte in medium, has coloring carrier with photoluminescence coloring, where light source is provided for stimulating photoluminescence Download PDFInfo
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- DE102008011578A1 DE102008011578A1 DE200810011578 DE102008011578A DE102008011578A1 DE 102008011578 A1 DE102008011578 A1 DE 102008011578A1 DE 200810011578 DE200810011578 DE 200810011578 DE 102008011578 A DE102008011578 A DE 102008011578A DE 102008011578 A1 DE102008011578 A1 DE 102008011578A1
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- photoluminescence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6408—Fluorescence; Phosphorescence with measurement of decay time, time resolved fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7769—Measurement method of reaction-produced change in sensor
- G01N2021/7786—Fluorescence
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- Immunology (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Optics & Photonics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft einen photometrischen Sensor zum Bestimmen der Konzentration eines Analyten in einem Medium, wobei die Konzentration die Zeitkonstante der Photolumineszenz eines Lumineszenzfarbstoffs beeinflusst. Derartige Sensoren arbeiten prinzipiell nach dem folgenden Prinzip: Eine Lichtquelle, regt eine Photolumineszenz eines Lumineszenzfarbstoffs auf einem Träger an, wobei der Träger einem Medium ausgesetzt ist, in welchem der Analyt enthalten ist. Anhand der ermittelten Zeitkonstanten der abklingenden Photolumineszenz kann die Konzentration des Analyten bestimmt werden.The The present invention relates to a photometric sensor for Determining the concentration of an analyte in a medium, wherein the concentration is the time constant of the photoluminescence of a luminescent dye affected. Such sensors work in principle according to the following principle: A light source excites photoluminescence of a luminescent dye on a support, wherein the support is a medium is exposed, in which the analyte is contained. Based on determined time constant of the decaying photoluminescence can the concentration of the analyte can be determined.
Ein typisches Beispiel hierfür ist gelöster Sauerstoff in einem wässrigen Medium.One typical example of this is dissolved oxygen in an aqueous medium.
Eine Übersicht
dazu ist beispielsweise in der
Messtechnisch ist es eine Herausforderung, mit geringem Aufwand die Zeitkonstante der Photolumineszenz zu bestimmen. Lam offenbart hierzu beispielsweise in Kapitel 5.1.1. eine sinusförmige Anregung der Photolumineszenz, der naturgemäß ein sinusförmiges Photolumineszenzsignal folgt. Aus der Phasenverschiebung zwischen der Anregung und der Photolumineszenz. Dieses Verfahren ist einerseits sehr energieaufwendig weil kontinuierlich angeregt und gemessen werden muss, um den Phasenwinkel zu bestimmen. In Kapitel 5.1.2. wird eine so genannte Impulsmessung beschrieben, wonach zunächst ein Lichtimpuls gesendet wird und anschließend das abklingende Lumineszenzsignal I(t) erfasst wird. Anhand des Verlaufs der Kurve I(t) wird dann rechnerisch die Zeitkonstante bestimmt. Zu einer hinreichend genauen Bestimmung der Mittelwerte bedarf es nach Lam einer Mittelwertbildung über viele Messwerte. Stattdessen schlägt Lam das normierte Integral der Abklingkurve vor.Metrologically It is a challenge, with little effort, the time constant to determine the photoluminescence. For example, Lam discloses this in chapter 5.1.1. a sinusoidal excitation of the photoluminescence, the naturally a sinusoidal photoluminescence signal follows. From the phase shift between the excitation and the Photoluminescence. This process is on the one hand very energy consuming because it is necessary to continuously excite and measure the phase angle to determine. In chapter 5.1.2. becomes a so-called momentum measurement described, after which initially a light pulse is sent and then the decaying luminescence signal I (t) is detected. Based on the course of the curve I (t) is then computationally the Time constant determined. To a sufficiently accurate determination the mean values according to Lam require an averaging over many readings. Instead, Lam beats the normalized integral the decay curve.
Wenngleich dieser Ansatz eine Vereinfachung bedeutet, setzt auch er zunächst eine Normierung und dann eine Integration voraus, um die Zeitkonstante bestimmen zu können.Although this approach means a simplification, he also sets first a normalization and then an integration ahead to the time constant to be able to determine.
Es ist daher die Aufgabe der vorliegenden Erfindung, einen Photolumineszenz-Sensor und ein Verfahren zum Bestimmen der Zeitkonstanten einer Photolumineszenz-Reaktion bereitzustellen, welche die geschilderten Nachteile des Stands der Technik überwindet.It Therefore, the object of the present invention is a photoluminescence sensor and a method of determining the time constant of a photoluminescent reaction to provide the disadvantages of the prior Technology overcomes.
Die Aufgabe wird erfindungsgemäß gelöst durch den Photolumineszenz-Sensor gemäß dem unabhängigen Patentanspruch 1 und dem Verfahren gemäß dem unabhängigen Patentanspruch 8.The The object is achieved by the photoluminescence sensor according to the independent Claim 1 and the method according to the independent Claim 8.
Der erfindungsgemäße Photolumineszenz-Sensor zum Bestimmen der Konzentration eines Analyten in einem Medium, aufgrund der Zeitkonstanten einer Photolumineszenz, die sich in Abhängigkeit der Konzentration des Analyten verändert, umfasst einen Farbstoffträger, der den Photolumineszenz-Farbstoff aufweist; eine Lichtquelle zum Anregen der Photolumineszenz; einen Detektor zum Erfassen der Photolumineszenz, und zur Ausgabe eines von der Intensität der Photolumineszenz abhängigen Primärsignals; und eine Auswertungsschaltung, um anhand des zeitlichen Verlaufs des Primärsignals die Zeitkonstante der Photolumineszenz zu ermitteln; dadurch gekennzeichnet dass die Zeitkonstante anhand einer Übergangszeit bestimmbar ist, die das Primärsignal oder ein davon abgeleitetes Signal benötigt, von einem ersten vorgegeben oder vorgebbaren Pegel auf einen zweiten vorgegebenen oder vorgebbaren Pegel zu fallen.Of the Inventive photoluminescence sensor for determining the concentration of an analyte in a medium, due to the time constant a photoluminescence, which varies depending on the concentration of the analyte, comprises a dye carrier, having the photoluminescent dye; a light source for Exciting the photoluminescence; a detector for detecting the photoluminescence, and for outputting one of the intensity of photoluminescence dependent primary signal; and an evaluation circuit, to the temporal course of the primary signal the To determine the time constant of the photoluminescence; characterized that the time constant can be determined on the basis of a transitional period is the primary signal or a signal derived therefrom needed, from a first predetermined or predefinable Level to fall to a second predetermined or predeterminable level.
Nach einer Ausgestaltung der Erfindung ist die Auswerteschaltung weiterhin dazu ausgelegt, anhand der ermittelten Zeitkonstanten die Konzentration des Analyten in dem Medium zu bestimmen.To An embodiment of the invention, the evaluation is still designed to determine the concentration based on the determined time constants of the analyte in the medium.
Gemäß einer Weiterbildung der Erfindung wird die Zeitkonstante unter Annahme eines exponentiellen Zerfalls des Photolumineszenz-Signals bestimmt.According to one Further development of the invention is the time constant under the assumption an exponential decay of the photoluminescence signal.
Gemäß einer Ausgestaltung der Erfindung umfasst der Photolumineszenz-Farbstoff ein sauerstoffsensitives Fluorophor, insbesondere ein polyzyklisches aromatisches Fluorophor oder eine Komplexverbindung mit einem Metallion.According to one Embodiment of the invention comprises the photoluminescent dye an oxygen-sensitive fluorophore, in particular a polycyclic aromatic fluorophore or a complex compound with a metal ion.
Der Farbstoff kann insbesondere in einen membranartigen Träger eingebracht sein der ein Gewebe, ein Vlies oder eine Polymermatrix umfasst. Die Polymermatrix kann beispielsweise Polystyrol, Polysulfon oder Polymethylsiloxan enthalten.Of the In particular, dye can be transformed into a membrane-like carrier be introduced a tissue, a non-woven or a polymer matrix includes. The polymer matrix can be, for example, polystyrene, polysulfone or polymethylsiloxane.
Die Lichtquelle enthält in einer derzeit bevorzugten Ausgestaltung der Erfindung eine Blitzlampe. Das Licht kann beispielsweise über einen Strahlteiler und einen Aperturwandler in eine Faseroptik eingekoppelt werden, um damit ein Fluorophor anzuregen. Über die gleiche Faseroptik kann das Lumineszenzsignal zu einem Photodetektor geführt werden.The Light source contains in a presently preferred embodiment the invention of a flash lamp. The light can be over, for example a beam splitter and an aperture converter coupled into a fiber optic to stimulate a fluorophore. About the same Fiber Optics, the luminescence signal is fed to a photodetector become.
Das Erfindungsgemäße Verfahren zum Bestimmen der Zeitkonstanten eines Photolumineszenz-Signals umfasst die Schritte: Anregen eines Photolumineszenz-Farbstoffs mit einer Lichtquelle; Erfassen des Photolumineszenz-Signals des angeregten Photolumineszenz-Farbstoffs, erfassen der Zeit, die das Photolumineszenz-Signal benötigt, um von einem ersten vorgegebenen Signalpegel auf einen zweiten vorgegebenen Signalpegel zu fallen.The method according to the invention for determining the time constant of a photoluminescence signal comprises the steps of: exciting a photoluminescent dye with a light source; Detecting the photoluminescence signal of the excited photoluminescent dye, detecting the The time required for the photoluminescent signal to fall from a first predetermined signal level to a second predetermined signal level.
Die Erfindung wird nun anhand eines in den Zeichnungen illustrierten Ausführungsbeispiels erläutert. Es zeigt:The Invention will now be illustrated with reference to an illustrated in the drawings Embodiment explained. It shows:
Der erfindungsgemäße Sensor ermittelt nun die Zeitkonstanten, indem die Zeit erfasst wird, welche das Signal braucht, um von einem vorgegebenen Wert U1 auf einen Wert U2 abzufallen.Of the sensor according to the invention now determines the time constants, by detecting the time the signal takes to get from one predetermined value U1 drop to a value U2.
Eine
Ausführungsform des erfindungsgemäßen
Photolumineszenz-Sensors
Der
Mikroprozessor
Die
in
Die
Ausgänge des ersten und des Zweiten Komparators werden
einem logischen UND-Schalter
Gegebenenfalls können den Komparatoren Filter vorgeschaltet sein, um beispielsweise ein verauschtes Signal U(t) zu glätten.Possibly may be upstream of the comparators filter, for example to smooth out an exchanged signal U (t).
Zudem können die Widerstandselemente R1 bis R5, ggf. abstimmbar gestaltet sein, um die Schwellwerte U1 und U2 ggf. den Gegenbenheiten einer Messstelle anpassen zu können.moreover can the resistive elements R1 to R5, if necessary tunable be designed to the thresholds U1 and U2, if necessary, the Gegenbenheiten a To be able to adapt the measuring point.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte Nicht-PatentliteraturCited non-patent literature
- - Dissertation, von Hung T. Lam mit dem Titel „Entwicklung eines faseroptischen Chemo- und eines Biosensors und deren Einsatz in der Biotechnologie” gegeben die im Fachbereich Chemie der Universität Hannover 2002 [0003] Dissertation, by Hung T. Lam entitled "Development of a fiber-optic chemo- and a biosensor and their use in biotechnology" given in the Department of Chemistry of the University of Hannover 2002 [0003]
Claims (8)
Priority Applications (1)
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DE200810011578 DE102008011578A1 (en) | 2008-02-28 | 2008-02-28 | Photo-luminescence sensor for determining concentration of analyte in medium, has coloring carrier with photoluminescence coloring, where light source is provided for stimulating photoluminescence |
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DE200810011578 DE102008011578A1 (en) | 2008-02-28 | 2008-02-28 | Photo-luminescence sensor for determining concentration of analyte in medium, has coloring carrier with photoluminescence coloring, where light source is provided for stimulating photoluminescence |
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DE102008011578A1 true DE102008011578A1 (en) | 2009-09-03 |
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DE200810011578 Withdrawn DE102008011578A1 (en) | 2008-02-28 | 2008-02-28 | Photo-luminescence sensor for determining concentration of analyte in medium, has coloring carrier with photoluminescence coloring, where light source is provided for stimulating photoluminescence |
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Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4104014A1 (en) * | 1990-02-16 | 1991-08-22 | Jenoptik Jena Gmbh | Determining absolute intracellular calcium ion concn. - by staining with calcium sensitive fluorescent dye then scanning fluorescence decay of complexed and free dye |
DE69002937T2 (en) * | 1989-01-19 | 1994-03-24 | Eastman Kodak Co | MATERIAL AND METHOD FOR oxygen sensing. |
WO2001096383A2 (en) * | 2000-06-16 | 2001-12-20 | Martek Biosciences Corporation | High fluorescent intensity cross-linked allophycocyanin |
DE69812400T2 (en) * | 1997-11-03 | 2004-01-22 | Cancer Research Campaign Technology Ltd. | MEASURING THE CONCENTRATION OF A SUBSTANCE |
DE102004027132A1 (en) * | 2003-06-04 | 2005-01-27 | Inverness Medical Switzerland Gmbh | Early determination of assay results |
DE60014762T2 (en) * | 1999-05-24 | 2005-10-13 | Tosoh Corp., Shinnanyo | Method for the detection of ribonucleic acids |
DE60110755T2 (en) * | 2000-01-18 | 2006-01-19 | Council For The Central Laboratory Of The Research Councils, Warrington | TEST PROCEDURE FOR THE REFRESHING OF LIPOPROTEINS |
DE69534228T2 (en) * | 1994-04-21 | 2006-03-16 | Ralph Zuckerman | DETECTION OF INGREDIENTS BY LUMINESCENCE DURATION |
DE102005036410A1 (en) * | 2005-07-29 | 2007-02-01 | Biocam Gmbh | Method for determining the oxygen partial pressure distribution in at least one tissue surface section, in particular skin tissue surface section |
DE112005002567T5 (en) * | 2004-10-19 | 2007-11-22 | Wallac Oy | A new probe and its use in bioaffinity analyzes |
DE69935850T2 (en) * | 1998-02-16 | 2008-01-10 | Ge Healthcare Uk Ltd., Little Chalfont | METHOD FOR MEASURING THE OVERALL CONCENTRATION OF AN ANALYTE |
DE60314395T2 (en) * | 2002-04-19 | 2008-02-21 | Ge Healthcare Uk Ltd., Little Chalfont | METHOD OF MEASURING PROTEIN KINASE AND PHOSPHATASE ACTIVITY |
DE102004015682B4 (en) * | 2004-03-26 | 2008-07-31 | Bundesrepublik Deutschland, vertr. d. d. Bundesministerium für Wirtschaft und Technologie, dieses vertr. d. d. Präsidenten der Physikalisch-Technischen Bundesanstalt | Method and device for detecting a dye bolus injected into the body of a living being |
-
2008
- 2008-02-28 DE DE200810011578 patent/DE102008011578A1/en not_active Withdrawn
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69002937T2 (en) * | 1989-01-19 | 1994-03-24 | Eastman Kodak Co | MATERIAL AND METHOD FOR oxygen sensing. |
DE4104014A1 (en) * | 1990-02-16 | 1991-08-22 | Jenoptik Jena Gmbh | Determining absolute intracellular calcium ion concn. - by staining with calcium sensitive fluorescent dye then scanning fluorescence decay of complexed and free dye |
DE69534228T2 (en) * | 1994-04-21 | 2006-03-16 | Ralph Zuckerman | DETECTION OF INGREDIENTS BY LUMINESCENCE DURATION |
DE69812400T2 (en) * | 1997-11-03 | 2004-01-22 | Cancer Research Campaign Technology Ltd. | MEASURING THE CONCENTRATION OF A SUBSTANCE |
DE69935850T2 (en) * | 1998-02-16 | 2008-01-10 | Ge Healthcare Uk Ltd., Little Chalfont | METHOD FOR MEASURING THE OVERALL CONCENTRATION OF AN ANALYTE |
DE60014762T2 (en) * | 1999-05-24 | 2005-10-13 | Tosoh Corp., Shinnanyo | Method for the detection of ribonucleic acids |
DE60110755T2 (en) * | 2000-01-18 | 2006-01-19 | Council For The Central Laboratory Of The Research Councils, Warrington | TEST PROCEDURE FOR THE REFRESHING OF LIPOPROTEINS |
WO2001096383A2 (en) * | 2000-06-16 | 2001-12-20 | Martek Biosciences Corporation | High fluorescent intensity cross-linked allophycocyanin |
DE60314395T2 (en) * | 2002-04-19 | 2008-02-21 | Ge Healthcare Uk Ltd., Little Chalfont | METHOD OF MEASURING PROTEIN KINASE AND PHOSPHATASE ACTIVITY |
DE102004027132A1 (en) * | 2003-06-04 | 2005-01-27 | Inverness Medical Switzerland Gmbh | Early determination of assay results |
DE102004015682B4 (en) * | 2004-03-26 | 2008-07-31 | Bundesrepublik Deutschland, vertr. d. d. Bundesministerium für Wirtschaft und Technologie, dieses vertr. d. d. Präsidenten der Physikalisch-Technischen Bundesanstalt | Method and device for detecting a dye bolus injected into the body of a living being |
DE112005002567T5 (en) * | 2004-10-19 | 2007-11-22 | Wallac Oy | A new probe and its use in bioaffinity analyzes |
DE102005036410A1 (en) * | 2005-07-29 | 2007-02-01 | Biocam Gmbh | Method for determining the oxygen partial pressure distribution in at least one tissue surface section, in particular skin tissue surface section |
Non-Patent Citations (1)
Title |
---|
Dissertation, von Hung T. Lam mit dem Titel "Entwicklung eines faseroptischen Chemo- und eines Biosensors und deren Einsatz in der Biotechnologie" gegeben die im Fachbereich Chemie der Universität Hannover 2002 |
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Effective date: 20150303 |