EP1252507A2 - Procede de mesure et dispositif detecteur pour analyse et synthese chimique et pharmaceutique - Google Patents

Procede de mesure et dispositif detecteur pour analyse et synthese chimique et pharmaceutique

Info

Publication number
EP1252507A2
EP1252507A2 EP01902339A EP01902339A EP1252507A2 EP 1252507 A2 EP1252507 A2 EP 1252507A2 EP 01902339 A EP01902339 A EP 01902339A EP 01902339 A EP01902339 A EP 01902339A EP 1252507 A2 EP1252507 A2 EP 1252507A2
Authority
EP
European Patent Office
Prior art keywords
frequency
measuring method
measuring
oscillator
measuring cell
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Withdrawn
Application number
EP01902339A
Other languages
German (de)
English (en)
Inventor
Dieter Sewald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Infineon Technologies AG
Original Assignee
Infineon Technologies AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Infineon Technologies AG filed Critical Infineon Technologies AG
Publication of EP1252507A2 publication Critical patent/EP1252507A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
    • G01N27/3275—Sensing specific biomolecules, e.g. nucleic acid strands, based on an electrode surface reaction
    • G01N27/3276—Sensing specific biomolecules, e.g. nucleic acid strands, based on an electrode surface reaction being a hybridisation with immobilised receptors

Definitions

  • the present invention relates to a measuring method and a sensor device for chemical or pharmaceutical analysis and synthesis.
  • bioelectronic interfaces are currently being sought which can be used to record the time course of a reaction via the effect on an electrical variable, such as current flow or voltage.
  • FIG. 1 shows an overview of known electroanalytical methods.
  • the proposed methods apply principles of electronic measurement technology and are based on the evaluation of classic electronic quantities.
  • the time course of a reaction can be detected via the change in a current, the voltage, an impedance or a capacitance.
  • the sensitivity of the measuring system is always problematic here, i.e. the effect of the chemical biological reaction on the size to be measured is usually very small.
  • Changes in a current flow in the nA range can be detected.
  • the limited dynamic range of such a measurement is closely related to this. If, for example, one wanted to record a course of the reaction via a change in capacitance, this can be of the order of magnitude of the parasitic capacitances of an electrode arrangement. Once these dominate, bioelectronic measurement is no longer possible.
  • reaction takes place in a measuring cell provided with electrodes, and that this measuring cell is used as part of the resonator of an HF oscillator.
  • Characteristic information about the course of this reaction is preferably obtained by evaluating the oscillation frequency of the HF oscillator over the course of a reaction.
  • the frequency change is preferably measured and stored for various known organic substances, and information about the identity of this sample is obtained by comparing the frequency change when measuring an unknown sample with the stored frequency changes.
  • part of the oscillator signal to determine the oscillation frequency via a control path. It is particularly preferred to convert the high-frequency signal into a lower frequency range by means of a mixer circuit in order to simplify the further processing of the signal.
  • the frequency can then be determined, for example, using a frequency-voltage converter or frequency counter.
  • the frequency can also be determined by means of spectral transformation.
  • the spectral transformation can preferably take place by means of a digital signal processor or microprocessor.
  • a measuring method is preferred in particular for genetic engineering applications in which identical DNA or RNA single strands are attached to an inner surface of the measuring cell for a few bases, so that the impedance and thus the resonance of the measuring cell changes when in the Measuring cell introduced sample DNA or RNA with a suitable single strand end is present, since this then hybridizes to the single strands.
  • the distance between the electrodes should be less than 1 ⁇ m, preferably in the order of 0.2 ⁇ m.
  • all high-frequency components for the individual cells are arranged on an integrated circuit. In this way, optimal miniaturization can be achieved.
  • Corresponding integrated circuits can preferably be manufactured using CMOS technology.
  • the object according to the invention is also achieved by a sensor device for chemical or pharmaceutical analysis, in which a measuring cell is provided, in which a reaction takes place, and the measuring cell forms part of a resonator of an HF oscillator.
  • the RF oscillator can be set to different fundamental frequencies. This means that considerably more information can be obtained during the measurement.
  • a control path is preferably connected to the RF oscillator, which is connected to a mixer circuit. On in this way the frequency of the signal to be processed can be reduced to a frequency range which is essentially easier to process.
  • a frequency-voltage converter, a frequency counter or a device for spectral transformation is preferably connected to the mixer circuit.
  • a digital signal processor or a microprocessor can serve as the device for spectral transformation.
  • the device according to the invention can preferably comprise a multiplicity of measuring cells which are integrated microelectronically on a chip. In this way, a large number of samples can be measured simultaneously or a large number of measurements can be carried out simultaneously.
  • the chip is preferably implemented in CMOS technology, since analog high-frequency circuits for this application can easily be implemented in this technology.
  • a few bases long identical DNA or RNA single strands are attached to an inner surface of the measuring cell, so that the impedance and thus the resonance of the measuring cell changes when it is introduced into the measuring cell Sample DNA or RNA with a matching single strand end is present.
  • the distance between the electrodes is preferably less than 1 ⁇ m, more preferably in the order of 0.2 ⁇ m.
  • the invention teaches a large number of measuring cells incl. the corresponding electronic circuits microelectronic on silicon to integrate.
  • a measuring cell essentially consists of a container that can be filled with organic test substances.
  • a suitable electrode structure as a bioelectronic interface is arranged in this container.
  • the design of the integrated electronic circuits depends on the measurement technology chosen.
  • FIG. 2 shows different embodiments of the invention
  • FIG. 3 shows an equivalent circuit diagram for the electrode structure
  • Figure 4 shows the measurement signal in the course of a molecular reaction
  • FIG. 5 shows the course of the measurement signal for different molecules
  • FIG. 6 shows the structure of a microelectronic integrated measuring cell according to the invention
  • Figure 7 shows an inventive method for electronic
  • FIG. 8 shows an impedance spectroscopic method for detecting the hybridization, the sensor device is shown before the hybridization;
  • Figure 9 shows the device of Figure 8 after hybridization.
  • the shift of a frequency should be evaluated over the course of the process over time.
  • a high-frequency oscillator 1 oscillates at a known frequency f 0 .
  • its oscillation frequency is determined by a frequency-determining element (resonator), which is designed in the usual discrete circuit technology as an LC or RC type.
  • ESB electronic equivalent circuit diagram
  • the topology and dimensioning of the discrete elements of such an ESB is certainly dependent on the selected electrode structure (e.g. interdigital electrode, MOS transistor) and on the analyte to be investigated.
  • Certain circuit elements are fixed in size because they are given by the geometric structure of the measuring cell 10. Others will change their values in the course of a biochemical reaction of the analyte.
  • the measuring cell 10 at the electrode connections 12, 14 can preferably be used as part of the resonator of an HF oscillator 1. If certain ESB elements change during a reaction, this leads to a shift of the
  • characteristic information about a reaction sequence can now be obtained.
  • a conceivable measurement scenario is shown in FIG. 4. Here it is assumed that there are two reactants (molecule A and molecule B) in a measuring cell 10.
  • level differences can be recorded over several decades. A correspondingly high dynamic range can be expected.
  • the quality of such a measurement is essentially limited by the achievable quality of the resonator, which is also determined by the structure of the measuring cell 10 and the analyte.
  • the duration of a biochemical reaction is orders of magnitude longer than the time required for a measurement cycle (the latter is in the ms range). It is therefore advisable to carry out a large number of measurements on different samples in parallel.
  • a measuring principle is proposed for use in biosensor technology, for example chemical or pharmaceutical analysis, which is new in this context.
  • the method is based on the evaluation of the frequency change of a high-frequency oscillator 1 depending on the course of a (bioche- mix) reaction and is well suited for microelectronic implementation.
  • This type of measurement technique allows better results in terms of sensitivity and dynamic range to be expected compared to the known methods.
  • the measuring method according to the invention can initially be implemented as a microelectronic integrated solution, regardless of the choice of a particular technology.
  • a fixed frequency oscillator 1 is required, the oscillation frequency of which is also determined by the electrical properties of a biosensor electrode 2. Part of the oscillator signal is used to determine the oscillation frequency via a control path. In order to enable simple evaluation, the high-frequency signal is converted into a lower frequency range using a mixer circuit 3. The frequency can be determined at this point with a frequency-voltage converter, frequency counter or via spectral transformation (DSP, microprocessor), depending on how exactly or how intelligently such a measuring system should work.
  • DSP spectral transformation

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

L'invention concerne un procédé de mesure pour l'analyse et la synthèse chimique et pharmaceutique, selon lequel l'allure d'une réaction est détectée par variation de fréquence d'un oscillateur haute fréquence, ainsi qu'un dispositif détecteur y relatif, comprenant une cellule de mesure (10) dans laquelle s'effectue une réaction, la cellule de mesure formant une partie d'un résonateur d'un oscillateur HF (1).
EP01902339A 2000-01-21 2001-01-19 Procede de mesure et dispositif detecteur pour analyse et synthese chimique et pharmaceutique Withdrawn EP1252507A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10002595 2000-01-21
DE10002595A DE10002595A1 (de) 2000-01-21 2000-01-21 Messverfahren und Sensorvorrichtung für die chemische und pharmazeutische Analytik und Synthese
PCT/EP2001/000581 WO2001053818A2 (fr) 2000-01-21 2001-01-19 Procede de mesure et dispositif detecteur pour analyse et synthese chimique et pharmaceutique

Publications (1)

Publication Number Publication Date
EP1252507A2 true EP1252507A2 (fr) 2002-10-30

Family

ID=7628326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01902339A Withdrawn EP1252507A2 (fr) 2000-01-21 2001-01-19 Procede de mesure et dispositif detecteur pour analyse et synthese chimique et pharmaceutique

Country Status (4)

Country Link
US (1) US20020196009A1 (fr)
EP (1) EP1252507A2 (fr)
DE (1) DE10002595A1 (fr)
WO (1) WO2001053818A2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10002597A1 (de) * 2000-01-21 2001-08-02 Infineon Technologies Ag Verfahren und Vorrichtung zur Identifikation von in einer Trägerflüssigkeit vorhandenen Molekülen
US20060019373A1 (en) * 2002-12-09 2006-01-26 Kahlman Josephus Arnoldus H M Biosensor with rf signal transmission
KR100613612B1 (ko) * 2004-04-27 2006-08-18 삼성전자주식회사 인덕턴스 소자 및 캐패시턴스 소자를 이용한 바이오결합검출 장치 및 방법
KR100631213B1 (ko) * 2004-05-31 2006-10-04 삼성전자주식회사 인덕턴스 소자를 이용한 바이오결합 검출 장치 및 방법
KR100667307B1 (ko) * 2005-01-11 2007-01-12 삼성전자주식회사 Ｒｆ 무선 에너지 전송을 이용한 바이오결합 검출장치 및그 방법
US20100204936A1 (en) * 2009-02-11 2010-08-12 Midorion Ab Probing Electrode/Solution Interfaces
DE202011101482U1 (de) * 2011-06-06 2012-09-07 Robert Seuffer Gmbh & Co. Kg Vorrichtung zur Erfassung von Materialeigenschaften
EP3684322B1 (fr) * 2017-09-21 2022-04-20 F. Hoffmann-La Roche AG Installation de fabrication pharmaceutique et procédé de fabrication d'un produit pharmaceutique
CZ310555B6 (cs) * 2022-06-03 2025-11-26 Adasune S.R.O. Způsob analýzy chemického složení kapalné látky nebo kapalné směsi a analyzátor k provádění způsobu analýzy

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US4181881A (en) * 1978-05-15 1980-01-01 Preikschat F K Electrical impedance measuring apparatus for providing separate measurements of the conductivity and dielectric coefficient of various materials
EP0213825A3 (fr) * 1985-08-22 1989-04-26 Molecular Devices Corporation Capacitance multiple chimiquement modulée
EP0245477A4 (fr) * 1985-11-19 1989-08-09 Univ Johns Hopkins Capteur capacitif d'analyse et de mesure chimiques.
US5336383A (en) * 1989-05-05 1994-08-09 Isco, Inc. Pulsed field gel electrophoresis of large DNA
DE69221758T2 (de) * 1991-03-22 1998-01-02 Seiko Instr Inc Elektrochemische Messeinrichtung
US5846708A (en) * 1991-11-19 1998-12-08 Massachusetts Institiute Of Technology Optical and electrical methods and apparatus for molecule detection
IL103674A0 (en) * 1991-11-19 1993-04-04 Houston Advanced Res Center Method and apparatus for molecule detection
EP0587408A1 (fr) * 1992-09-07 1994-03-16 Terumo Kabushiki Kaisha Méthode de détermination d'ADN et senseur pour cela
WO1997021094A1 (fr) * 1995-12-01 1997-06-12 Innogenetics N.V. Systeme de detection par mesure de l'impedance et procede pour le fabriquer
US5981268A (en) * 1997-05-30 1999-11-09 Board Of Trustees, Leland Stanford, Jr. University Hybrid biosensors
DE19807338A1 (de) * 1998-02-20 1999-08-26 Mirsky Kapazitive Vorrichtung für die Detektion der Polynukleotid-Hybridisierung

Non-Patent Citations (1)

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Title
See references of WO0153818A3 *

Also Published As

Publication number Publication date
WO2001053818A2 (fr) 2001-07-26
WO2001053818A3 (fr) 2002-03-21
DE10002595A1 (de) 2001-08-09
US20020196009A1 (en) 2002-12-26

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