DE19819555B4 - bubble pressure - Google Patents
bubble pressure Download PDFInfo
- Publication number
- DE19819555B4 DE19819555B4 DE1998119555 DE19819555A DE19819555B4 DE 19819555 B4 DE19819555 B4 DE 19819555B4 DE 1998119555 DE1998119555 DE 1998119555 DE 19819555 A DE19819555 A DE 19819555A DE 19819555 B4 DE19819555 B4 DE 19819555B4
- Authority
- DE
- Germany
- Prior art keywords
- measuring
- capillary
- bubble pressure
- cleaning
- sample
- 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
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
- G01N27/38—Cleaning of electrodes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
- G01N2013/0241—Investigating surface tension of liquids bubble, pendant drop, sessile drop methods
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Blasendrucktensiometer zur Messung der Oberflächenspannung, bei dem ein Gas durch eine Messkapillare (3) in eine Probe einblasbar ist, wobei in einer Messzelle des Blasendrucktensiometers ein Ultraschallgeber (4) zur Online-Reinigung der Messkapillare vorgesehen ist, dadurch gekennzeichnet, dass in dem Deckel (5) der Messzelle die Messkapillare mit Gehäuse (3) und der Ultraschallgeber (4) in geringem gegenseitigem Abstand fixiert sind.Bubble pressure tensiometer for measuring the surface tension at which a gas is blown into a sample through a measuring capillary (3), wherein an ultrasonic generator (4) for online cleaning of the measuring capillary is provided in a measuring cell of the bubble pressure tensiometer, characterized in that in the lid ( 5) of the measuring cell, the measuring capillary with housing (3) and the ultrasonic generator (4) are fixed at a small mutual distance.
Description
Die Erfindung bezieht sich auf ein Blasendrucktensiometer zur Messung der Oberflächenspannung von Flüssigkeiten nach dem Oberbegriff des Anspruchs 1.The The invention relates to a bubble pressure tensiometer for measurement the surface tension of liquids according to the preamble of claim 1.
Bei derartigen bekannten Geräten wird ein Gas in die Probe, d. h. eine Messprobe, eingeblasen und aus dem maximalen Blaseninnendruck die Oberflächenspannung der Probe berechnet. Um das Gas in die Probe einzublasen, wird es durch eine Kapillare, deren Durchmesser im Vergleich zur Länge gering ist, in die Probe eingeleitet. Hierzu muss die Kapillare in die Probe eintauchen und kann demzufolge durch die Probe verschmutzt werden. Verschmutzungen an der Kapillare bewirken ein Verfälschen des Messergebnisses. Deshalb muss die Kapillare bei der Messung unterschiedlicher Proben regelmäßig gereinigt werden. Hierzu wird die Kapillare aus dem Gerät entnommen und in eine spezielle Reinigungsvorrichtung, beispielsweise ein Ultraschallbad, gelegt und gereinigt.at such known devices a gas is introduced into the sample, i. H. a sample, injected and calculated from the maximum internal bubble pressure, the surface tension of the sample. To inject the gas into the sample, it is passed through a capillary, whose diameter is small compared to the length in the sample initiated. For this, the capillary must be immersed in the sample and can therefore be contaminated by the sample. contamination at the capillary cause a falsification of the measurement result. Therefore, the capillary must be used when measuring different samples be cleaned regularly. For this purpose, the capillary is removed from the device and into a special Cleaning device, such as an ultrasonic bath, laid and cleaned.
Eine solche regelmäßige Reinigung behindert jedoch den Einsatz der Blasendruckmethode bei der online-Messung. Hier muss die Oberflächenspannung kontinuierlich erfasst werden, um Änderungen im Prozess zu detektieren. Eine Reinigung würde die Messwerterfassung unterbrechen. Außerdem erfordert sie qualifiziertes Personal, das für derartige Anlagen nur begrenzt verfügbar ist.A such regular cleaning hinders the use of the bubble pressure method in online measurement. Here must be the surface tension continuously detected to detect changes in the process. A cleaning would interrupt the data acquisition. Besides, it requires qualified Staff for that Such systems are limited.
Um
diese Nachteile zu beheben, gehört
es zum Stand der Technik (
Weiterhin
ist ein Blasendrucktensiometer zur Messung der Oberflächenspannung
bekannt, bei dem ein Gas durch eine Messdüse in eine Probe einer Messzelle
eingeblasen wird, wobei an der Messzelle des Blasendrucktensiometers
eine Düsenreinigungseinrichtung,
welche mit einer Elektronik gesteuert wird, zur online-Reinigung
der Messdüse
vorgesehen ist (
Bekannt
ist auch ein Blasendrucktensiometer zur Messung der Oberflächenspannung,
bei dem Gas durch eine Düse
in eine Probe in einer Messzelle eingeblasen wird, wobei das Blasendrucktensiometer
einen Betriebsmodus aufweist, bei dem das Gas mit voller Volumenstromleistung
einer Gas-Volumenstromquelle
zur Reinigung durch die Messdüse
geblasen wird (
Bei
einer ferner bekannten Vorrichtung zur online-Messung der Oberflächenspannung
von Tensidlösungen
mit einem Blasendrucktensiometer strömt die Tensidlösung über eine
Kammer nahezu laminar in eine Messkammer, in der eine Messkapillare,
jedoch keine Reinigungsvorrichtung, angeordnet ist (
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, in einem Blasendrucktensiometer der eingangs genannten Gattung die räumliche Zuordnung des zur Reinigung der Kapillare vorgesehenen Ultraschallgebers zu der Kapillare zu verbessern.Of the present invention is based on the object in a bubble pressure tensiometer the aforementioned genus the spatial allocation of the for cleaning the capillary provided to the ultrasonic transducer to the capillary improve.
Diese Aufgabe wird mit einem Blasendrucktensiometer mit einer Messzelle gelöst, welche die Merkmale des Anspruchs 1 aufweist.These Task is with a bubble pressure tensiometer with a measuring cell solved, which has the features of claim 1.
Die
erfindungsgemäße Messzelle
ist auf den
In
dem Gehäuse
Durch
den geringen Abstand zwischen der Messkapillare
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1998119555 DE19819555B4 (en) | 1998-04-30 | 1998-04-30 | bubble pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1998119555 DE19819555B4 (en) | 1998-04-30 | 1998-04-30 | bubble pressure |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19819555A1 DE19819555A1 (en) | 1999-11-04 |
DE19819555B4 true DE19819555B4 (en) | 2010-10-28 |
Family
ID=7866426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1998119555 Expired - Fee Related DE19819555B4 (en) | 1998-04-30 | 1998-04-30 | bubble pressure |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19819555B4 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI20010772A (en) * | 2001-04-12 | 2002-10-13 | Kibron Inc Oy | Measuring Instruments |
DE10308198B3 (en) * | 2003-02-25 | 2004-07-22 | Miele & Cie. Kg | Surface tension determination method for tenside solution, e.g. a washing solution, using bubble pressure method |
CN101799392B (en) * | 2010-02-11 | 2011-11-16 | 奚明 | Portable surface tension tester |
RU2554637C1 (en) * | 2013-12-09 | 2015-06-27 | Сергей Александрович Акопян | Surface tension measurement method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19529787A1 (en) * | 1995-08-12 | 1997-02-13 | Foron Hausgeraete Gmbh | Method and device for level-independent measurement of the surface tension of liquid substances |
DE19636644C1 (en) * | 1996-05-31 | 1997-07-03 | Univ Dresden Tech | Dynamic measurement device for surface tension of solution |
DE19603386A1 (en) * | 1996-01-31 | 1997-08-07 | Lauda Dr R Wobser Gmbh & Co Kg | Measurement and control of surfactant solution surface tension using bubble excess pressure tensiometer |
DE19653752A1 (en) * | 1996-12-20 | 1998-06-25 | Sita Mestechnik Gmbh I G | Automatic method for cleansing measuring cells and capillaries used for determining surface tension |
-
1998
- 1998-04-30 DE DE1998119555 patent/DE19819555B4/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19529787A1 (en) * | 1995-08-12 | 1997-02-13 | Foron Hausgeraete Gmbh | Method and device for level-independent measurement of the surface tension of liquid substances |
DE19603386A1 (en) * | 1996-01-31 | 1997-08-07 | Lauda Dr R Wobser Gmbh & Co Kg | Measurement and control of surfactant solution surface tension using bubble excess pressure tensiometer |
DE19636644C1 (en) * | 1996-05-31 | 1997-07-03 | Univ Dresden Tech | Dynamic measurement device for surface tension of solution |
DE19653752A1 (en) * | 1996-12-20 | 1998-06-25 | Sita Mestechnik Gmbh I G | Automatic method for cleansing measuring cells and capillaries used for determining surface tension |
Also Published As
Publication number | Publication date |
---|---|
DE19819555A1 (en) | 1999-11-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20141101 |