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DE10011822A1 - Filterless unit for on-line measurement of fluids comprises valve controlled capillary system, inert gas injection and photo cell - Google Patents

Filterless unit for on-line measurement of fluids comprises valve controlled capillary system, inert gas injection and photo cell

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Publication number
DE10011822A1
DE10011822A1 DE2000111822 DE10011822A DE10011822A1 DE 10011822 A1 DE10011822 A1 DE 10011822A1 DE 2000111822 DE2000111822 DE 2000111822 DE 10011822 A DE10011822 A DE 10011822A DE 10011822 A1 DE10011822 A1 DE 10011822A1
Authority
DE
Germany
Prior art keywords
filterless
inert gas
line measurement
gas injection
capillary system
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Withdrawn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
DE2000111822
Other languages
German (de)
Inventor
Georg Haertel
Willi Reisinger
Wilfried Loebel
Roland Haseneder
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 DE2000111822 priority Critical patent/DE10011822A1/en
Publication of DE10011822A1 publication Critical patent/DE10011822A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
    • 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
    • G01N33/18—Water

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

Abstract

An arrangement for the filterless on-line measurement of fluids comprises sampling using a valve controlled capillary system, inert gas injection, a photo cell and a back washing facility.

Description

Die Prinzipschaltbilder der Erfindung sind in den Fig. 1-3 dargestellt und werden im folgenden näher beschrieben.The basic circuit diagrams of the invention are shown in FIGS. 1-3 and are described in more detail below.

Fig. 1 Gesamtansicht der Messanordnung Fig. 1 General view of the measuring arrangement

Fig. 2 Ungefilterte Probenahme Fig. 2 Unfiltered sampling

Fig. 3 Mischung zweier Flüssigkeiten durch Verwirbelung Fig. 3 mixture of two liquids by swirling

Die zu messende Flüssigkeit wird kontinuierlich in das Fallrohr geleitet (Fig. 1, 2). Über das Fallrohr wird die Probe mit dem Druck von etwa 1 bar an der in Strömungsrichtung gebogenen Einlasskapillare vorbeigepumpt. Die Strömung reißt die schweren Partikel mit sich, wodurch ein Verstopfen der Kapillare verhindert wird. Mit dem Öffnen von Ventil V6 und V7 wird die Probe in das Glasrohr geleitet, bis die Lichtschranke 1 reagiert und das Ventil V6 und V7 schließt. Wenn das Signal der Lichtschranke 1 nicht innerhalb einer bestimmten Zeit ausgelöst wird, erfolgt über die Ventile V5-V7 ein Freiblasen der Kapillare mittels Druckluft und anschließend eine weitere Probenahme. Die Dosierung der Probemenge entspricht etwa 200 µl.The liquid to be measured is continuously fed into the downpipe ( Fig. 1, 2). The sample is pumped past the inlet capillary bent in the direction of flow via the downpipe at a pressure of approximately 1 bar. The flow pulls the heavy particles with it, preventing the capillary from clogging. When valves V6 and V7 open, the sample is directed into the glass tube until light barrier 1 reacts and valve V6 and V7 closes. If the signal from light barrier 1 is not triggered within a certain time, the valves V5-V7 blow out the capillary using compressed air and then take another sample. The dosage of the sample amount corresponds to approximately 200 µl.

Nun wird mit Öffnung von Ventil V4 durch eine Quarzkapillare Helium in der Weise eingeblasen, daß eine Verwirbelung erzeugt wird (Fig. 1, 3). Nach dem Öffnen der Ventile V1 und V2 wird die Titrierlösung gleichzeitig von oben und von unten in die zu messende Probe durch Gravimetrie zugemischt, bis der Umschlagpunkt erreicht ist. Dieser wird durch die zweite Lichtschranke 2 (Schwellwert) erkannt und zum Microcontroller weitergemeldet. Die Zeit vom Beginn der Titration bis zum Erkennen des Umschlagpunkts wird vom Microcontroller oder einem PC ausgewertet und als Konzentration in Gramm pro Liter ausgegeben. Die Ventile V1 und V2 werden sodann wieder geschlossen.Now, with opening of valve V4, helium is blown in through a quartz capillary in such a way that a swirl is generated ( FIGS. 1, 3). After opening valves V1 and V2, the titration solution is simultaneously mixed into the sample to be measured from above and below by gravimetry until the point of change is reached. This is recognized by the second light barrier 2 (threshold value) and passed on to the microcontroller. The time from the start of the titration until the point of change is recognized is evaluated by the microcontroller or a PC and output as a concentration in grams per liter. The valves V1 and V2 are then closed again.

Zur Spülung des Glasrohrs werden die Ventile V3 (Wasser) und V8 (Abfluss) geöffnet. Nach der Spülung mit Wasser werden die Ventile V3 und V8 wieder geschlossen und ein neuer Messzyklus kann erfolgen.Valves V3 (water) and V8 (drain) are opened to flush the glass tube. To When flushing with water, valves V3 and V8 are closed again and a new one Measuring cycle can take place.

Substanzarten und Konzentrationsbereiche der Messung werden durch die Wahl geeigneter Titrierlösungen bestimmt und das Auswertungsprogramm mit Kalibriertabellen angepasst.Substance types and concentration ranges of the measurement are made more suitable by the choice Determine titration solutions and adapt the evaluation program with calibration tables.

Claims (5)

1. Vorrichtung zur filterlosen On-Line Messung in Flüssigkeiten dadurch gekennzeichnet, daß die Probenahme mittels eines in Strömungsrichtung angeordneten, ventilgesteuerten Kapillarsystems erfolgt.1. Device for filterless on-line measurement in liquids, characterized in that the sampling is carried out by means of a valve-controlled capillary system arranged in the flow direction. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß Inertgas in die Probelösung in der Art eingeblasen wird, daß eine Verwirbelung entsteht.2. Device according to claim 1, characterized in that inert gas in the sample solution is blown in such a way that a turbulence arises. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Titrierlösung gleichzeitig von oben und von unten in die zu messende Probe zugemischt wird.3. Apparatus according to claim 1 or 2, characterized in that the titration solution is mixed simultaneously from above and from below into the sample to be measured. 4. Vorrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Ermittlung des Umschlagpunkts über eine Photozelle erfolgt.4. Device according to one of the preceding claims, characterized in that the The transition point is determined using a photocell. 5. Vorrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß bei Verstopfung der Probenahmeeinheit durch Rückspülen die Probenahmeeinheit gereinigt werden kann.5. Device according to one of the preceding claims, characterized in that at Blockage of the sampling unit cleaned by backwashing the sampling unit can be.
DE2000111822 2000-03-10 2000-03-10 Filterless unit for on-line measurement of fluids comprises valve controlled capillary system, inert gas injection and photo cell Withdrawn DE10011822A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2000111822 DE10011822A1 (en) 2000-03-10 2000-03-10 Filterless unit for on-line measurement of fluids comprises valve controlled capillary system, inert gas injection and photo cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2000111822 DE10011822A1 (en) 2000-03-10 2000-03-10 Filterless unit for on-line measurement of fluids comprises valve controlled capillary system, inert gas injection and photo cell

Publications (1)

Publication Number Publication Date
DE10011822A1 true DE10011822A1 (en) 2001-09-13

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DE2000111822 Withdrawn DE10011822A1 (en) 2000-03-10 2000-03-10 Filterless unit for on-line measurement of fluids comprises valve controlled capillary system, inert gas injection and photo cell

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DE (1) DE10011822A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220240632A1 (en) * 2019-10-07 2022-08-04 Survitec Group Limited Slide fastener

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1921486B2 (en) * 1969-04-26 1979-02-08 Gebrueder Heyl Kg Gesellschaft Fuer Analysentechnik, 3200 Hildesheim Programmed system for automatic titration - has valve arrangement on measurement chamber which allows rapid purging with purge liquor
GB2154547A (en) * 1984-02-24 1985-09-11 George Levey Liquid sampling device
DE3842068A1 (en) * 1988-12-14 1990-06-21 Buehler Edmund Gmbh & Co Method and apparatus for determining the ammonium nitrogen content in aqueous systems
DE4032520A1 (en) * 1990-10-11 1992-04-16 Laser & Analytical Res DEVICE FOR TAKING SAMPLES FROM PARTICLE-LOADED FLOW MEDIA
DE4123736A1 (en) * 1991-07-17 1993-01-21 Knauf Westdeutsche Gips METHOD AND DEVICE FOR CONTINUOUSLY CHECKING THE CONTENT OF CHLORIDES IN FLUE GAS PLASTER
DE29618560U1 (en) * 1996-10-24 1998-02-19 Meichelböck, Wilfried, 82152 Krailling Device for continuous concentration determination and concentration control of sample solutions

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1921486B2 (en) * 1969-04-26 1979-02-08 Gebrueder Heyl Kg Gesellschaft Fuer Analysentechnik, 3200 Hildesheim Programmed system for automatic titration - has valve arrangement on measurement chamber which allows rapid purging with purge liquor
GB2154547A (en) * 1984-02-24 1985-09-11 George Levey Liquid sampling device
DE3842068A1 (en) * 1988-12-14 1990-06-21 Buehler Edmund Gmbh & Co Method and apparatus for determining the ammonium nitrogen content in aqueous systems
DE4032520A1 (en) * 1990-10-11 1992-04-16 Laser & Analytical Res DEVICE FOR TAKING SAMPLES FROM PARTICLE-LOADED FLOW MEDIA
DE4123736A1 (en) * 1991-07-17 1993-01-21 Knauf Westdeutsche Gips METHOD AND DEVICE FOR CONTINUOUSLY CHECKING THE CONTENT OF CHLORIDES IN FLUE GAS PLASTER
DE29618560U1 (en) * 1996-10-24 1998-02-19 Meichelböck, Wilfried, 82152 Krailling Device for continuous concentration determination and concentration control of sample solutions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PO,A.Li Wan, IRWIN,W.J.: The determination of pKa and partition data: an automated approach. In: Laboratory Practice, Jan. 1980, Vol.29, S.21-25 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220240632A1 (en) * 2019-10-07 2022-08-04 Survitec Group Limited Slide fastener

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8120 Willingness to grant licenses paragraph 23
8139 Disposal/non-payment of the annual fee