DE707449C - Arrangement for carrying out the method for the electrometric measurement of the oxygen content of a solution - Google Patents
Arrangement for carrying out the method for the electrometric measurement of the oxygen content of a solutionInfo
- Publication number
- DE707449C DE707449C DES134187D DES0134187D DE707449C DE 707449 C DE707449 C DE 707449C DE S134187 D DES134187 D DE S134187D DE S0134187 D DES0134187 D DE S0134187D DE 707449 C DE707449 C DE 707449C
- Authority
- DE
- Germany
- Prior art keywords
- solution
- electrode
- arrangement
- oxygen content
- carrying
- 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
- G01N27/403—Cells and electrode assemblies
- G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
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)
- Measuring Oxygen Concentration In Cells (AREA)
Description
Anordnung zur Durchführung des Verfahrens zur elektrometrischen Messung des Sauerstoffgehaltes einer Lösung Das Hauptpatent hat ein Verfahren zur elektrometrischen Überwachung von oxydierenden oder reduzierenden Lösungen zum Gegenstand. Zur Ausschaltung des Einflusses des pH-Wertes auf das Meßergebnis wird dort eine von der zu untersuchenden Lösung nicht angreifbare, nur auf den pH-Wert ansprechende Vergleichselektrode mit einer auch auf das Oxydations- oder Reduktionsmittel ansprechenden Meßelektrode zusammengeschaltet, so daß sich unabhängig von den benutzten Oxydations- oder Reduktionsmitteln der Einfluß des p-Wertes auf das N.eßergebnis ausschalten läßt.Arrangement for carrying out the method for electrometric measurement the oxygen content of a solution The main patent has a method for electrometric Monitoring of oxidizing or reducing solutions on the subject. To switch off the influence of the pH value on the measurement result becomes one of the one to be examined Solution with non-vulnerable comparison electrode that only responds to the pH value a measuring electrode which is also responsive to the oxidizing or reducing agent interconnected, so that they are independent of the oxidizing or reducing agents used the influence of the p-value on the N.measurement result can be switched off.
Als Meßelektroden kommen gemäß dem Hauptpatent hauptsächlich solche aus Platin zur Verwendung. Will man mit diesen jedoch Messungen des Sauerstoffgehaites vornehmen, so erhält man keine zuverlässigen Werte, weil Platin als Sauerstoffelektrodè nicht genügend reversible Eigenschaften aufweist. According to the main patent, such electrodes are mainly used as measuring electrodes made of platinum for use. However, if you want to measure the oxygen content with these no reliable values are obtained because platinum is used as the oxygen electrode does not have enough reversible properties.
Bekanntlich sprechen nun Metall-Metalloxyd-E1ektroden, z. B. Antimonelektroden, sowohl auf den pH-Wert als auch auf Änderungen der Sauerstofikonzentration an. Erfindungsgemäß wird daher als sauerstoffempfindliche Meßelektrode eine Metall-Metalloxyd-Elektrode, vorzugsweise eine Antimon elektrode, verwendet, wobei gemäß dem Hauptpatent zur Ausschaltung des Einflusses des pH-Wertjes eine nur auf den pE-Wert ansprechende Elektrode, z.B. eine Glaselektrode, der Meßelektrode als Vergleichselektrode entgegengeschaltet wird. It is well known that metal-metal oxide electrodes, e.g. B. antimony electrodes, both the pH and changes in the oxygen concentration. According to the invention Therefore, a metal-metal oxide electrode is used as the oxygen-sensitive measuring electrode, preferably an antimony electrode, used, according to the main patent for Elimination of the influence of the pH value - one that only responds to the pE value Electrode, e.g. a glass electrode, the measuring electrode as a reference electrode is counteracted.
An sich können bei dem Verfahren nach dem Hauptpatent auch Metall-Metalloxyd-Elektroden verwendet werden, sofern diese in der betreffenden Lösung nicht angegriffen werden. Sie dienen dort jedoch nur als Vergleichselektroden, während sie nach dem neuen Vorschlag als Meßelektroden in Zu sammenschaltung mit einer in der betreffenden Lösung unangreifbaren Vergleichselektrode benutzt werden. In principle, metal-metal oxide electrodes can also be used in the process according to the main patent can be used as long as they are not attacked in the solution in question. However, they only serve there as reference electrodes while they are looking for the new one Proposal as measuring electrodes in to collective circuit with one in the relevant Solution unassailable comparison electrode can be used.
Diese erfindungsgemäße Anordnung hat gegenüber anderen zur Durchführung der bekannten Verfahren dienenden Einrichtungen wie gegenüber der Anordnung, bei welcher polarisierte galvanische Elemente benutzt werden, und dem Verfahren, das den Diffusionsstrom bei Elektroden aus gleichartigem Werkstoff unter gleichzeitiger Benutzung einer gesonderten Spannungsquelle erfaßt, den Vorzug, daß hier die Meßempflndlichkeit mit abnehmendem Sauerstoffgehalt exponentiell steigt, so daß gerade kleine Mengen an gelöstem Sauerstoff in Wasser sehr genau bestimmt werden können. This arrangement according to the invention has to be implemented over others the known method serving facilities as compared to the arrangement which polarized galvanic elements are used and the method that the diffusion current for electrodes made of the same material with simultaneous Use of a separate voltage source detects the advantage that here the measurement sensitivity increases exponentially with decreasing oxygen content, so that just small amounts can be determined very precisely in dissolved oxygen in water.
Ein weiterer Vorteil gegenüber dem Bekannten ist der, daß die Messung in der genannten Anordnung praktisch strömungs- und erschütterungsunempflndlich ist und daß wegen des geringen Temperaturkoeffizienten bei reinen potentiometrischen Messungen gegenüber Messungen an polarisierten Elektroden der Temperatureinfluß wesentlich kleiner ist. Das gibt die Möglichkeit, eine Temperaturkompensation mit Widerstandsthermometern bzw. Thermoelementen leichter und weitaus genauer als bei den bisher bekannten Verfahren durchzuführen. Another advantage over the known is that the measurement In the above-mentioned arrangement, it is practically insensitive to flow and vibrations is and that because of the low temperature coefficient in pure potentiometric Measurements versus measurements on polarized electrodes, the influence of temperature is much smaller. That gives the possibility of a temperature compensation with Resistance thermometers or thermocouples lighter and far more accurate than with to carry out the previously known method.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES134187D DE707449C (en) | 1938-10-11 | 1938-10-11 | Arrangement for carrying out the method for the electrometric measurement of the oxygen content of a solution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES134187D DE707449C (en) | 1938-10-11 | 1938-10-11 | Arrangement for carrying out the method for the electrometric measurement of the oxygen content of a solution |
Publications (1)
Publication Number | Publication Date |
---|---|
DE707449C true DE707449C (en) | 1941-06-23 |
Family
ID=7539636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES134187D Expired DE707449C (en) | 1938-10-11 | 1938-10-11 | Arrangement for carrying out the method for the electrometric measurement of the oxygen content of a solution |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE707449C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2776245A (en) * | 1953-05-11 | 1957-01-01 | Wigton Abbott Corp | Preparation of nickel carbonate catalysts and utilization thereof for desulfurization |
-
1938
- 1938-10-11 DE DES134187D patent/DE707449C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2776245A (en) * | 1953-05-11 | 1957-01-01 | Wigton Abbott Corp | Preparation of nickel carbonate catalysts and utilization thereof for desulfurization |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2548405A1 (en) | MINIATURE PROBE | |
DE2820441B2 (en) | Method and apparatus for determining the rate of an enzyme reaction | |
DE1915170C3 (en) | Method and arrangement for determining the migration speed and / or concentration of zones in electrophoresis | |
DE707449C (en) | Arrangement for carrying out the method for the electrometric measurement of the oxygen content of a solution | |
DE1170677B (en) | Standard reference electrode for pH measurement | |
DE4225904A1 (en) | Sensor for direct measurement of electrochemical properties of fluid - having electrolyte in housing with porous membrane, used for fluids with high resistance e.g. oil | |
DE2260193A1 (en) | METHOD AND DEVICE FOR MEASURING THE ACTIVITY OF SULFUR OXYDES | |
EP0262582B1 (en) | Method for determining the concentration ratio of lithium to sodium ions and apparatus for carrying out this method | |
DE1234416B (en) | Measuring electrode for determining the hydrogen ion concentration | |
DE1922225A1 (en) | Ion exchange electrode | |
DE882315C (en) | Method for the determination of chemically oxidizable or reducible substances, especially oxygen in water, by measuring depolarization | |
DE668448C (en) | Method and device for direct measurement of the content of solutions of depolarizing components | |
DE1773834B2 (en) | Device for the electrochemical determination of halogen ions by diffusion flow measurement and method for the continuous determination of halogenated hydrocarbons in air | |
DE1084495B (en) | Method and device for determining the degree of freshness of animal meat tissue, preferably of farm fish | |
AT136517B (en) | Device and electrode for hydrogen ion concentration measurement and electrometric titration. | |
DE2111008A1 (en) | Device for the direct determination of the concentration of solutions through temperature measurement, with the elimination of the disruptive heat effects through a purely electrical path | |
DE2645846A1 (en) | DEVICE FOR AUTOMATIC, CONTINUOUS MEASUREMENT OF THE DENSITY | |
DE962205C (en) | Device for measuring the ion concentration, e.g. B. the p-value, of fluids | |
DE716596C (en) | Device for I? Measurement | |
DE834597C (en) | Process for the treatment of metal salt electrodes produced by casting and used for measuring ion concentrations | |
DE648381C (en) | Method for determining the amount of oxygen absorbed in water, especially in boiler feed water | |
CH420668A (en) | Reference or derivation electrode for potential measurements | |
DE475767C (en) | Device for determining the nature, in particular the acid content, of gastric juice | |
DE2519125A1 (en) | SELECTIVE HALOGENIDE AND SULFIDE SENSITIVE ELECTRODES | |
DE438793C (en) | Electrode for measuring the concentration of H. ions in living organisms |