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DE19652412C1 - Chip for monitoring mercury concentration in air - Google Patents

Chip for monitoring mercury concentration in air

Info

Publication number
DE19652412C1
DE19652412C1 DE1996152412 DE19652412A DE19652412C1 DE 19652412 C1 DE19652412 C1 DE 19652412C1 DE 1996152412 DE1996152412 DE 1996152412 DE 19652412 A DE19652412 A DE 19652412A DE 19652412 C1 DE19652412 C1 DE 19652412C1
Authority
DE
Germany
Prior art keywords
chip according
web
chip
air
strip
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.)
Expired - Fee Related
Application number
DE1996152412
Other languages
German (de)
Inventor
Martin Welp
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE1996152412 priority Critical patent/DE19652412C1/en
Priority to DE1997141697 priority patent/DE19741697C2/en
Priority to DE19781373T priority patent/DE19781373D2/en
Priority to AU57478/98A priority patent/AU5747898A/en
Priority to PCT/DE1997/002904 priority patent/WO1998025134A1/en
Application granted granted Critical
Publication of DE19652412C1 publication Critical patent/DE19652412C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • 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
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/0045—Hg

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

Chip for monitoring the mercury concentration in air consists of an electrically insulating substrate with a strip on it whose electrical resistance is changed by the effect of mercury vapour. The novelty is that the air impinges freely on the strip. The strip width is thinner than a few microns or less. Also claimed is a process for evaluating the chip, in which the chips from all uses are fed to a central station and automatically measured. Preferably the thickness of the layer is approx. 100 nm, or more than 10 nm. The strip is meander-shaped, or spiral-shaped. The strip is more than 50 cm long, pref. approx. 70 cm. The width of the strip is less than 100 microns, pref. approx. 75 microns and more than 1 micron. The substrate is larger than the surface on which the strip is located.

Description

Die Erfindung bezieht sich auf einen Chip zur Überwachung der Quecksilberkonzentration in der Luft, bestehend aus einem elektrisch isolierenden Substrat und einer auf diesem befind­ lichen Bahn, die mehrfach ihre Richtung ändert und deren elektrischer Widerstand sich bei Einwirkung von Quecksilber­ dampf ändert.The invention relates to a chip for monitoring the Mercury concentration in the air, consisting of one electrically insulating substrate and one on it lane that changes direction several times and their electrical resistance when exposed to mercury steam changes.

Wird der elektrische Widerstand der Bahn nach einer gewissen Zeit, in der der Chip der Luft ausgesetzt war, gemessen, kön­ nen aus den Meßwerten Rückschlüsse auf die Quecksilberkonzen­ tration in der Luft gezogen werden. Der Chip kann z. B. als Plakette von einer Person getragen werden oder sich an einem Arbeitsplatz befinden.Will the electrical resistance of the web after a certain The time the chip was exposed to air can be measured From the measured values, conclusions can be drawn about the mercury concentrations tration in the air. The chip can e.g. B. as Plaque to be worn by a person or attached to one Workplace.

Bei einem bekannten Chip dieser Art (DE 22 63 399 C2) ist die Seite des Substrats, auf der sich die Bahn befindet, durch eine Kappe mit Kanälen abgedeckt. Diese Kappe soll den unmit­ telbaren Aufprall der Umgebungsluft verhindern. Über die Län­ ge der Bahn wird keine allgemein verbindliche Aussage ge­ macht. Beim Ausführungsbeispiel 1 ist sie 15 cm.In a known chip of this type (DE 22 63 399 C2) Side of the substrate on which the web is located a cap covered with channels. This cap is said to Prevent noticeable impact of the ambient air. Over the lands No generally binding statement is made on the web makes. In embodiment 1, it is 15 cm.

Der Erfindung liegt die Aufgabe zugrunde, den eingangs er­ wähnten Chip derart auszubilden, daß mit ihm extrem geringe Quecksilberkonzentrationen erfaßbar sind.The invention is based, he the beginning imagined chip in such a way that with him extremely low Mercury concentrations are detectable.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Umgebungsluft weitgehend ungehindert die Bahn beaufschlagen kann und daß die Bahn eine Länge hat, die größer als 1 m istThis object is achieved in that the Ambient air acts on the web largely unhindered can and that the web has a length that is greater than 1 m

Bei dem erfindungsgemäßen Chip fehlt also die Schutzkappe. Dieser Sachverhalt und die sehr große Länge der Bahn, die erfindungsgemäß vorgeschlagen wird, in Verbindung mit ihrem extrem geringen Querschnitt (bedingt durch die geringe Flä­ chenausdehnung des Chips), führen dazu, daß man noch sehr geringe Quecksilberkonzentrationen (qualitativ und quantita­ tiv) erfassen kann.The protective cap is therefore missing in the chip according to the invention. This fact and the very long length of the web, the is proposed according to the invention in connection with her extremely small cross-section (due to the small area expansion of the chip), cause you to very much low mercury concentrations (qualitative and quantitative tiv) can capture.

Der Widerstand der Bahn liegt bei einigen KΩ.The resistance of the train is a few KΩ.

Die Herstellung solcher Bahnen ist im Wege der Mikrosystem­ technik möglich.The production of such webs is by way of the microsystem technology possible.

Vorzugsweise beträgt die Länge der Bahn mehrere Meter, insbe­ sondere etwa 10 m. Die Schichtdicke der Bahn ist vorzugsweise extrem gering, insbesondere wenige µm.The length of the web is preferably several meters, in particular especially about 10 m. The layer thickness of the web is preferred extremely small, especially a few µm.

Natürlich könnte der erfindungsgemäße Chip auch zur Messung der Quecksilberkonzentration in einem anderen Gas als Luft verwendet werden.Of course, the chip according to the invention could also be used for measurement the mercury concentration in a gas other than air be used.

Die Bahn besteht vorzugsweise aus einem Metall, das mit Quecksilber ein Amalgam bildet, vorzugsweise aus Gold, weil dieses sehr inert ist und die höchste Affinität zu Quecksil­ ber hat.The track is preferably made of a metal with Mercury forms an amalgam, preferably from gold, because this is very inert and has the highest affinity for mercury about.

Claims (12)

1. Chip zur Überwachung der Quecksilberkonzentration in der Luft, bestehend aus einem elektrisch isolierenden Substrat und einer auf diesem befindlichen Bahn, die mehrfach ihre Richtung ändert und deren elektrischer Widerstand sich bei Einwirkung von Quecksilberdampf ändert, dadurch gekennzeich­ net, daß die Luft weitgehend ungehindert die Bahn beaufschla­ gen kann und daß die Bahn eine Länge hat, die größer als 1 m ist.1. Chip for monitoring the mercury concentration in the air, consisting of an electrically insulating substrate and a web located on it, which changes direction several times and whose electrical resistance changes when exposed to mercury vapor, characterized in that the air is largely unimpeded Bahn can act and that the web has a length that is greater than 1 m. 2. Chip nach Anspruch 1, dadurch gekennzeichnet, daß die Län­ ge der Bahn etwa 10 m beträgt.2. Chip according to claim 1, characterized in that the Län ge of the train is about 10 m. 3. Chip nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Querschnitt der Bahn wenige µm2 beträgt.3. Chip according to claim 1 or 2, characterized in that the cross section of the web is a few µm 2 . 4. Chip nach Anspruch 3, dadurch gekennzeichnet, daß die Schicht-Dicke der Bahn wenige µm beträgt.4. Chip according to claim 3, characterized in that the Layer thickness of the web a few µm is. 5. Chip nach einem der Ansprüche 1 bis 4, dadurch gekenn­ zeichnet, daß die Fläche, auf der sich die Bahn befindet, im Bereich von etwa 20 mm × etwa 30 mm liegt.5. Chip according to one of claims 1 to 4, characterized shows that the surface on which the web is located in Range of about 20 mm × about 30 mm. 6. Chip nach einem der Ansprüche 1 bis 5, dadurch gekenn­ zeichnet, daß das Substrat größer als die Fläche ist, auf der sich die Bahn befindet.6. Chip according to one of claims 1 to 5, characterized records that the substrate is larger than the area on which the train is located. 7. Chip nach Anspruch 6, dadurch gekennzeichnet, daß das Sub­ strat rechteckige Form hat und im Bereich von 5,5 cm × 8,5 cm liegt, d. h. Scheckkartenformat hat.7. Chip according to claim 6, characterized in that the sub strat rectangular shape and in the area of 5.5 cm × 8.5 cm lies, d. H. Credit card format. 8. Chip nach einem der Ansprüche 1 bis 7, dadurch gekenn­ zeichnet, daß dieser auf der Seite, auf der sich die Bahn befindet, eine dünne quecksilberdurchlässige Membran auf­ weist, die Störeinflüsse, wie Luftfeuchtigkeit, abhält. 8. Chip according to one of claims 1 to 7, characterized records that this is on the side on which the web a thin membrane that is permeable to mercury indicates that interferences such as air humidity.   9. Chip nach Anspruch 8, dadurch gekennzeichnet, daß die Mem­ bran aus Polytetrafluoräthylen besteht.9. Chip according to claim 8, characterized in that the mem bran is made of polytetrafluoroethylene. 10. Chip nach einem der Ansprüche 1 bis 9, dadurch gekenn­ zeichnet, daß die Bahn aus einem Metall besteht, das mit Quecksilber ein Amalgam bildet.10. Chip according to one of claims 1 to 9, characterized records that the track is made of a metal that with Mercury forms an amalgam. 11. Chip nach Anspruch 10, dadurch gekennzeichnet, daß die Bahn aus Gold besteht.11. Chip according to claim 10, characterized in that the The track is made of gold. 12. Verfahren zum Auswerten der Chips gemäß einem der Ansprü­ che 1 bis 11, dadurch gekennzeichnet, daß die der Luft ausge­ setzten Chips zahlreicher Einsatzfälle einer Zentralstation zugeführt werden und dort automatisch durchgemessen werden.12. Method for evaluating the chips according to one of the claims che 1 to 11, characterized in that the air out set chips of numerous applications of a central station are fed and measured there automatically.
DE1996152412 1996-12-06 1996-12-06 Chip for monitoring mercury concentration in air Expired - Fee Related DE19652412C1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE1996152412 DE19652412C1 (en) 1996-12-06 1996-12-06 Chip for monitoring mercury concentration in air
DE1997141697 DE19741697C2 (en) 1996-12-06 1997-09-18 Chip for monitoring the concentration of mercury in the air
DE19781373T DE19781373D2 (en) 1996-12-06 1997-12-05 Chip for monitoring the concentration of mercury in the air
AU57478/98A AU5747898A (en) 1996-12-06 1997-12-05 Chip for monitoring air mercury concentration
PCT/DE1997/002904 WO1998025134A1 (en) 1996-12-06 1997-12-05 Chip for monitoring air mercury concentration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996152412 DE19652412C1 (en) 1996-12-06 1996-12-06 Chip for monitoring mercury concentration in air

Publications (1)

Publication Number Publication Date
DE19652412C1 true DE19652412C1 (en) 1998-08-27

Family

ID=7814946

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996152412 Expired - Fee Related DE19652412C1 (en) 1996-12-06 1996-12-06 Chip for monitoring mercury concentration in air

Country Status (1)

Country Link
DE (1) DE19652412C1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2263399C2 (en) * 1971-12-22 1982-01-14 Minnesota Mining and Manufacturing Co., 55101 Saint Paul, Minn. Dosimeter for mercury vapor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2263399C2 (en) * 1971-12-22 1982-01-14 Minnesota Mining and Manufacturing Co., 55101 Saint Paul, Minn. Dosimeter for mercury vapor

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