DE858022C - Device for continuous p measurement in liquids - Google Patents
Device for continuous p measurement in liquidsInfo
- Publication number
- DE858022C DE858022C DEB12766A DEB0012766A DE858022C DE 858022 C DE858022 C DE 858022C DE B12766 A DEB12766 A DE B12766A DE B0012766 A DEB0012766 A DE B0012766A DE 858022 C DE858022 C DE 858022C
- Authority
- DE
- Germany
- Prior art keywords
- metals
- antimony
- measurement
- alloys
- liquid
- 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
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
- G01N27/416—Systems
- G01N27/4166—Systems measuring a particular property of an electrolyte
- G01N27/4167—Systems measuring a particular property of an electrolyte pH
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (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)
Description
Es ist bekannt, die Messung der Wasserstoffionenkonzentration in Flüssigkeiten mittels Elektroden aus Antimon, Wolfram oder anderen durch gelösten Sauerstoff oxydierbaren Metallen oder deren Legierungen vorzunehmen. Hierbei treten aber leicht Oberflächenveränderungen durch Oxydation oder Verkrustungen ein, so daß der Meßwert gefälscht wird. Man hat daher schon vorgeschlagen, die Oherfläche der Elektroden laufend durch Bürsten zu reinigen. Hierbei zeigt sich jedoch bei den hisher bekannten Anordnungen der Nachteil, daß sich trotz des Bürsten eine vollkommene Reinigung nicht ohne weiteres erzielen läßt, weil sich mit der Zeit eine unwirksame Schicht um die Elektrode bildet, die den Zutritt der zu messenden Lösung zur Elektrode erschwert und mitunter sogar ganz verhindert. It is known to measure the hydrogen ion concentration in Liquids dissolved by means of electrodes made of antimony, tungsten or other Oxygen oxidizable metals or their alloys. Step here but slight surface changes due to oxidation or incrustations, so that the measured value is falsified. It has therefore already been suggested that the outer surface to clean the electrodes continuously by brushing. However, this shows at the previously known arrangements the disadvantage that despite the brushing a perfect Cleaning cannot be achieved without further ado, because over time it becomes ineffective A layer around the electrode is formed that allows the solution to be measured to reach the electrode difficult and sometimes even completely prevented.
Es wurde nun gefunden, daß sich bei einer neuartigen Anordnung der Elektroden und der Bürsten dieser erhebliche Nachteil vermeiden läßt. Erfindungsgemäß besteht die aus den obenerwähnten Metallen oder Legierungen hergestellte Elektrode aus einem waagerecht angeordneten Ring, dessen poteiitialbestimmende Fläche nach unten gerichtet ist, w obei mindestens eine rotierbare Bürste dem Ring gegenüber angeordnet ist, die die elektromotorisch wirksame Fläche rein hält. Der bei den l>ekannten Anordnungen zwischen Elektrodenoberfläche und Bürste sich bildende Schmutzmantel, der den Zutritt der zu untersuchenden Lösung zur Elektrode verhindert, kann sich bei der vorliegenden Anordung nicht bilden, weil die Verunreinigungen hier laufend nach unten fallen und von der strömenden Lösung mitgerissen werden. It has now been found that in a novel arrangement of Electrodes and brushes can avoid this considerable disadvantage. According to the invention consists of the electrode made of the metals or alloys mentioned above from a horizontally arranged ring, whose potential-determining surface according to directed downwards, w obei at least one rotatable brush opposite the ring is arranged, which keeps the surface effective by the electric motor clean. Of both l> known arrangements between the electrode surface and the brush are formed Dirt coat that prevents the solution to be examined from reaching the electrode, cannot form in the present arrangement because of the impurities falling down here continuously and being carried away by the flowing solution.
Es hat sich ferner gezeigt, daß es von Vorteil ist, alle Bauteile der Elektrodenanordnung, außer der zur Messung notwendigen elektromotorisch wirksamen Metallfläche, die mit der zu messenden Flüssigkeit in Berührung kommen, aus isolierenden Stoffen oder solchen Metallen herzustellen, die in der Flüssigkeit keine Ionen bilden oder in der Spannungsreihe unterhalb von Antimon stehen. It has also been shown that it is advantageous to use all components the electrode arrangement, apart from the electromotive force necessary for the measurement Metal surfaces that come into contact with the liquid to be measured are made of insulating To produce substances or metals that do not form ions in the liquid or are below antimony in the voltage series.
Hierzu kann man z. B. Edelstähle oder geeignete Kunststoffe verwenden. Man kann die erwähnten Bauteile auch aus heliel)igen geeigneten Stoffen herstellen und mit den genannten isolierenden Stoffen überziehen.For this you can z. B. Use stainless steels or suitable plastics. The components mentioned can also be made from suitable materials and cover it with said insulating materials.
An Hand der Zeichnung sei die Erfindung näher erläutert: a stellt die ringförmige Elektrode, z. B. aus Antimon, und b eine doppelseitige Bürste dar, die durch die rotierende Welle g in Bewegung versetzt wird. Die Verbindungsteile c der Elektrode und die Welle g der Bürsten bestehen z. B. aus Chromnickelstahl (V 2 A) und die Elektrodenhalter 11 aus Kunststoff. Um die Elektrode nach außen zu isolieren, mündet die Welle in die Isolierkupplung f. i ist die Elektrodenableitung. Die zu untersuchende Lösung strömt bei d zu und bei e ab. The invention is explained in more detail with reference to the drawing: a represents the annular electrode, e.g. B. made of antimony, and b represents a double-sided brush, which is set in motion by the rotating shaft g. The connecting parts c of the electrode and the shaft g of the brushes are made, for. B. made of chrome nickel steel (V 2 A) and the electrode holder 11 made of plastic. To the outside of the electrode to isolate, the shaft ends in the isolating coupling f. i is the electrode lead. The solution to be examined flows in at d and out at e.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB12766A DE858022C (en) | 1950-12-02 | 1950-12-02 | Device for continuous p measurement in liquids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB12766A DE858022C (en) | 1950-12-02 | 1950-12-02 | Device for continuous p measurement in liquids |
Publications (1)
Publication Number | Publication Date |
---|---|
DE858022C true DE858022C (en) | 1952-12-04 |
Family
ID=6957273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB12766A Expired DE858022C (en) | 1950-12-02 | 1950-12-02 | Device for continuous p measurement in liquids |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE858022C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1033934B (en) * | 1955-10-24 | 1958-07-10 | Chlorator G M B H | Electrode measuring cell |
DE1060628B (en) * | 1954-02-19 | 1959-07-02 | Dr Fritz Lucht | Method and device for measuring and / or registering the oxygen dissolved in water, in particular industrial water, river water and wastewater |
DE1289667B (en) * | 1964-12-11 | 1969-02-20 | Siemens Ag | Motorized cleaning device driven by a shaft for a measuring surface of electrodes embedded in insulating material for electrometric measurements |
-
1950
- 1950-12-02 DE DEB12766A patent/DE858022C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1060628B (en) * | 1954-02-19 | 1959-07-02 | Dr Fritz Lucht | Method and device for measuring and / or registering the oxygen dissolved in water, in particular industrial water, river water and wastewater |
DE1033934B (en) * | 1955-10-24 | 1958-07-10 | Chlorator G M B H | Electrode measuring cell |
DE1289667B (en) * | 1964-12-11 | 1969-02-20 | Siemens Ag | Motorized cleaning device driven by a shaft for a measuring surface of electrodes embedded in insulating material for electrometric measurements |
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