EP1537400A1 - Procede et dispositif pour prelevement d'echantillons d'air ambiant - Google Patents

Procede et dispositif pour prelevement d'echantillons d'air ambiant

Info

Publication number
EP1537400A1
EP1537400A1 EP03732350A EP03732350A EP1537400A1 EP 1537400 A1 EP1537400 A1 EP 1537400A1 EP 03732350 A EP03732350 A EP 03732350A EP 03732350 A EP03732350 A EP 03732350A EP 1537400 A1 EP1537400 A1 EP 1537400A1
Authority
EP
European Patent Office
Prior art keywords
gas
indoor air
analysis
integrated
room air
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Withdrawn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
EP03732350A
Other languages
German (de)
English (en)
Inventor
Albrecht Vogel
Peter Krippner
Manfred Wetzko
Christian J. Schmidt
Antonio Ruzzu
Rolf Merte
Jan Czyzewski
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP1537400A1 publication Critical patent/EP1537400A1/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Withdrawn legal-status Critical Current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
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
    • G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/24—Suction devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
    • G01N2001/2217—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption using a liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40—Concentrating samples
    • G01N1/4055—Concentrating samples by solubility techniques
    • G01N2001/4066—Concentrating samples by solubility techniques using difference of solubility between liquid and gas, e.g. bubbling, scrubbing or sparging

Definitions

  • the invention relates to a method and a device for sampling indoor air samples according to the preamble of claims 1 and 7.
  • the invention thus relates to the field of air quality monitoring in closed rooms.
  • the state of the art for this is to take the air samples from closed rooms and send them to a laboratory in a separate analysis process.
  • stationary or transportable air sample meters are used, which are based, for example, on the principle of centrifugal separation, gas washing or membrane filter technology.
  • patogenic components are also switched off within the room air, and this requires a corresponding preparation of the air samples.
  • systems of this known type can only determine indoor air quality, but they cannot be regulated or adjusted in a timely manner.
  • the invention is therefore based on the object, in deviation from the requirements of the prior art, not only to analyze the ambient air, but also promptly
  • BEST ⁇ TIGÜNGSKOPIE To be able to influence them, or at least to be able to determine timely questionable concentrations of indoor air components in order to enable suitable timely measures.
  • the basic idea according to the invention in a manner according to the method and also according to the device, is that the room air sampling and the analysis are carried out immediately and in real time.
  • this has the advantage that there is a timely and local result between the current indoor air quality and the analysis as such.
  • threshold values can be set for this, on the basis of which appropriate suitable measures can then be generated.
  • a direct influence can be created by setting threshold values for certain indoor air components. • 3 - May 12, 2003
  • the sensitivity to different gas components and / or aerosols can be set. In this way, different gas components and / or aerosols that are of interest and are decisive for the indoor air quality can be used.
  • this crediting process can also be carried out by spray concentration.
  • the essence of the invention is to integrate the room air sampling means and the analysis means in an overall structural unit interconnected locally.
  • the corresponding units for this can be made compact, especially when micromechanical line and analysis systems are used.
  • gas scrubber or micro concentrators or micro gas scrubbers with an open or closed circuit and spray concentrators with a closed circuit can be used for the enrichment.
  • Molecular filter systems or multi-stage filter systems can also be used. The invention is illustrated in the drawing and described in more detail below.
  • Fig. 1 Modular structure of the microsensor system.
  • Fig. 2 Modular sampling unit.
  • Fig. 3 microconcentrator.
  • Fig. 4 Micro gas scrubber module.
  • Fig. 5 Microconcentrator with closed liquid flow.
  • Fig. 6 spray concentrator.
  • Fig. 7 spray concentrator with closed liquid flow.
  • Fig. 8 Micromixer.
  • Fig. 9 Molecular filter system.
  • Fig. 10 Two-stage filter system.
  • FIG. 1 shows the idea on which the invention is based, the sampling and
  • module 1 the gas to be examined, for example ambient air, is brought into contact with the solvent, for example water, for the purpose of dissolving the foreign substances.
  • module 2 this solution is fed to a second unit, module 3, where it is analyzed with the help of a test specific to the respective foreign substance.
  • the evaluation takes place via a microprocessor, module 4, and is displayed via a defined interface, module 5.
  • the analysis result can be displayed either in proportion to the actual concentration or as Alarm function, i.e. displaying a signal when a threshold value is exceeded.
  • the modular structure enables individual functional units to be exchanged.
  • the analysis unit can be used to renew or to detect others
  • FIG. 2 shows that by implementing the arrangement in microsystem technology, module 1, the sampling and solution unit can again be produced as a compact, modular system. Due to the modular structure, critical components, such as the actual unit for solving the foreign substances, can also be provided as a replacement part and can be exchanged at certain replacement intervals or after the alarm has been triggered by the control electronics.
  • the sampling unit is shown in the other figures.
  • Figure 3 shows a possibility of building a micro-concentrator based on the principle of gas scrubbing.
  • the basic arrangement provides for the gas to be examined to flow through a liquid container.
  • the amount dissolved is determined via a flow measurement and the solubility of the substances to be examined.
  • Figure 2 shows a micro gas scrubber unit consisting of a multi-level structure with a coupled gas and liquid guide.
  • the liquid is fed into a micromechanically produced cavity via valves.
  • the gas is pumped into the liquid via a plate with a large number of microchannels. By dividing the gas flow into a large number of small outlet openings, a very large interface between the two media is obtained with a high gas throughput.
  • Figure 4 shows the possibility of reducing the position dependency due to the liquid filling.
  • the surface energy of the three interfaces is decisive for the necessary channel size.
  • a gas-permeable membrane can also be used in such a microsystem.
  • FIG. 5 the reproducibility of such a microconcentrator can be increased by operating with a closed gas circuit.
  • a defined amount of gas is enclosed in a recipient V1. This is then passed through the liquid several times in a closed circuit by means of a pump. This allows the percentage of solutes to reach each
  • Solubility product are gradually increased. With a very low concentration of the substances to be dissolved in the gas, this cycle can also be carried out several times with the volume V1 being refilled. Here, the liquid filling V2 remains during the cycle repetitions in order to achieve a concentration in the solution.
  • a further possibility of achieving a forced solution of the foreign substances is to spray the solvent liquid by means of a nozzle in a recipient filled with the gas to be examined according to FIG. 6. Due to the very large total surface area and thus the interface of the liquid drops, a large proportion of the foreign substances in the gas are dissolved. The distributed liquid is condensed again by cooling the walls of the recipient, pumped out and can be used for further analysis.
  • Figure 7 shows another example. By repeating the process, that is
  • the proportions of gas-borne foreign matter still present in the recipient can be increasingly dissolved and the substances can be concentrated in the solution. This can be done both cyclically and continuously. For this purpose, a closed circuit is created via a second pump. The solvent is no longer injected directly into the nozzles, but rather injected into the circuit at the beginning. After running through the required number of cycles or time, the gas consumed in the above sense is released and the recipient is refilled.
  • Figure 8 shows that a large interface between the gas in the solvent can also be achieved by swirling in a mixer unit.
  • the gas and liquid supply are each divided into many small channels and then merged again.
  • the mixing ratio is set by the line cross-sections and different flow velocities.
  • the foreign substances are dissolved out on a subsequent mixing section the gas into the solvent.
  • the exhaust gas can then be withdrawn from the solution in a degasser by means of a pump.
  • FIG. 9 shows how foreign substances contained in the gas to be examined are filtered out and solved by finally rinsing the filter.
  • the gas is passed through a filter.
  • the amount of foreign matter collected is determined by the volume flow and the filter is then rinsed with a suitable solvent through a fluid circuit connected in parallel.
  • FIG. 10 shows a two-stage filter screen. The solvent flows through both here

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Molecular Biology (AREA)
  • Biomedical Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettent de prélever des échantillons d'air ambiant. L'invention vise, en s'éloignant des réserves de l'état de la technique, à non seulement analyser l'air ambiant, mais également à permettre d'influer rapidement sur ledit air, ou bien à pouvoir déterminer au moins de manière appropriée aux circonstances du moment des concentrations des constituants de l'air ambiant, afin de pouvoir prendre des mesures appropriées. A cet effet, il est prévu que le prélèvement d'échantillons d'air ambiant et l'analyse sont effectués directement à la suite l'un de l'autre, de manière appropriée en termes de temps et de lieu.
EP03732350A 2002-05-10 2003-05-12 Procede et dispositif pour prelevement d'echantillons d'air ambiant Withdrawn EP1537400A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10220709 2002-05-10
DE10220709 2002-05-10
PCT/EP2003/004956 WO2003095983A1 (fr) 2002-05-10 2003-05-12 Procede et dispositif pour prelevement d'echantillons d'air ambiant

Publications (1)

Publication Number Publication Date
EP1537400A1 true EP1537400A1 (fr) 2005-06-08

Family

ID=29413723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03732350A Withdrawn EP1537400A1 (fr) 2002-05-10 2003-05-12 Procede et dispositif pour prelevement d'echantillons d'air ambiant

Country Status (2)

Country Link
EP (1) EP1537400A1 (fr)
WO (1) WO2003095983A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005040764A1 (fr) * 2003-10-16 2005-05-06 Smiths Detection Inc. Plate-forme d'analyse automatique d'un aerosol organique
WO2012112040A1 (fr) * 2011-02-15 2012-08-23 Uc Technologies Appareil de détection
DE102021203474A1 (de) 2021-04-08 2022-10-13 Radix Gmbh Nachweisen spezifischer agenzien in der umgebungsluft

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9110325U1 (fr) * 1991-08-21 1992-12-17 Robert Bosch Gmbh, 7000 Stuttgart, De
US5255556A (en) * 1991-10-15 1993-10-26 Tec-Way Air Quality Products, Inc. Air quality indicator and control for air quality machine
US5565677A (en) * 1995-08-04 1996-10-15 The University Of Delaware Aerodynamic nozzle for aerosol particle beam formation into a vacuum
JPH0961315A (ja) * 1995-08-24 1997-03-07 Sharp Corp 雰囲気中不純物の捕集方法および分析装置
DE19946110C1 (de) * 1999-09-17 2001-02-01 Apsys Advanced Particle System Optisches Verfahren zur Charakterisierung von Partikeln in einem System, z.B. einem Reinraum, und Vorrichtung zur Durchführung des Verfahrens
FR2812395B1 (fr) * 2000-07-31 2003-01-10 Bp Chemicals Snc Procede et dispositif pour l'analyse d'emission atmospheriques
GB0024227D0 (en) * 2000-10-04 2000-11-15 Secr Defence Air samplers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03095983A1 *

Also Published As

Publication number Publication date
WO2003095983A1 (fr) 2003-11-20

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