DE8914033U1 - pH measuring probe - Google Patents
pH measuring probeInfo
- Publication number
- DE8914033U1 DE8914033U1 DE8914033U DE8914033U DE8914033U1 DE 8914033 U1 DE8914033 U1 DE 8914033U1 DE 8914033 U DE8914033 U DE 8914033U DE 8914033 U DE8914033 U DE 8914033U DE 8914033 U1 DE8914033 U1 DE 8914033U1
- Authority
- DE
- Germany
- Prior art keywords
- electrolyte
- measuring probe
- measuring
- electrodes
- electrode
- 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 - Lifetime
Links
- 239000000523 sample Substances 0.000 title claims description 4
- 239000003792 electrolyte Substances 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- VISKNDGJUCDNMS-UHFFFAOYSA-M potassium;chlorite Chemical compound [K+].[O-]Cl=O VISKNDGJUCDNMS-UHFFFAOYSA-M 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 206010040560 shock Diseases 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- G01N27/36—Glass electrodes
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)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Description
BeschreibungDescription
Die Neuerung betrifft ein pH-Meßweitgeber, insbesondere eine pH-Meßelektrode.The innovation concerns a pH measuring transmitter, in particular a pH measuring electrode.
O Es ist b&kan.?.t, Elektroden zur Messung einesO It is b&kan.?.t, electrodes for measuring a
pH-Wertes in Flüssigkeiten oder feuchten Feststoffen, wie Lebensmitteln vorzusehen, die im wesentliches »as einer Elektrolytlösung vom pH-Wert 7, insbesondere einer Kaliumchloritlösupg besteht, die von einer Glasmembrane umgeben iä>t, welche für Wasserstoffionen durchlässig ist, und in welcher Elektroden aus einem geeigneten Werkstoff, wie Platin oder Silber/ Silberchlorid, eintauchen/ die durch ein Diaphragma getrennt sind und an welchem eine Spannung gemessen werden kann, diepH value in liquids or moist solids such as foodstuffs, which essentially consists of an electrolyte solution of pH 7, in particular a potassium chlorite solution, surrounded by a glass membrane which is permeable to hydrogen ions, and in which electrodes made of a suitable material such as platinum or silver/silver chloride are immersed, separated by a diaphragm and at which a voltage can be measured which
/ dem pH-Wert des Mediums,in das die Glasmembran/ the pH value of the medium in which the glass membrane
eintaucht, im wesentlichen proportional ist, wenn Druck- und Temperaturbedingungen im Bereich normaler (Raum-)Werte liegen.immersed is essentially proportional when pressure and temperature conditions are within the range of normal (room) values.
Werden solche Elektroden in agressiven Medien, die z.B. Cyan- oder Chrom-VI-ionen enthalten, eingesetzt, so muß der Elektrolyt entweder unter Überdruck gesetzt werden oder häufig erneuert werden. Wenn die Elektrode bei der Messung nicht senkrecht oder im wesentlichen senkrecht steht, z-B. schräg seitlich in frisch geschlachteteIf such electrodes are used in aggressive media, which contain e.g. cyano or chromium VI ions, the electrolyte must either be pressurized or frequently replaced. If the electrode is not vertical or essentially vertical during the measurement, e.g. if it is placed at an angle in freshly slaughtered
/1 • f " /1 • f "
Tiere, die am Haken hängen, eingestochen werden, um die Frische des Fleisches zu messen, können Strcsämn^-en er.-folgen- die dadurch bedingt sind, daß ein Luftraum im Elektrolytraum der Elektrode vorliegt,Animals that are hanging on a hook and are punctured to measure the freshness of the meat can suffer from shocks. These are caused by the fact that there is an air space in the electrolyte chamber of the electrode.
% wodurch eine der Elektroden bei horizontaler % whereby one of the electrodes in horizontal
f[ Messung frei liegen kann und die Messung f[ measurement can be freely positioned and the measurement
|| nicht mehr möglich oder durch Eindringen|| no longer possible or by intrusion
?| J von Fremdionen:' fehlerhaft wird.?| J of foreign ions:' becomes faulty.
Es wurde gefunden, daß diese Nachteile dadurch beseitigt werden können, wenn der Elektrolyt so verfestigt wird, daß er im Elektrolytraum im v.asent-lichen unbeweglich bzw. zähflüssig vorliegt.It has been found that these disadvantages can be eliminated if the electrolyte is solidified in such a way that it is essentially immobile or viscous in the electrolyte space.
Die neuerungsgemäße pH-Heßsonde, insbesondere pH-Meßelektrode ist somit dadurch gekennzeichnet, daß im Elektrolytraum eine unbewegliche bzw. zähflüssig gemachter / * Elektrolyt vorhanden ist.The pH measuring probe according to the innovation, in particular the pH measuring electrode, is thus characterized by the fact that an immobile or viscous / * electrolyte is present in the electrolyte chamber.
Gemäß einer bevorzugten Ausführungsform liegt der Elektrolyt als in Silicagel eingebettete Elektrolytlösung vor. Es können aber auch andere Gele, wie organische Gummen oder Polysaccharide oder andere Gemische indifferenter gelbildende Substanzen verwendet werden, wie pyrogene Kieselsäuren, gegebenenfalls im Gemisch mit Siliconkautschuken * oder anderen indifferenten Polymeren.According to a preferred embodiment, the electrolyte is present as an electrolyte solution embedded in silica gel. However, other gels such as organic gums or polysaccharides or other mixtures of indifferent gel-forming substances can also be used, such as pyrogenic silica, optionally in a mixture with silicone rubbers * or other indifferent polymers.
Die Neuerung wird durch begefügte Zeichnungen erläutert.The innovation is explained by the attached drawings.
Es zeigenShow it
Fig. 1 eine Ag/AgCl - pH-Elektrode und Fig. 2 eine Pt/Pt - pH-Elektrode.Fig. 1 an Ag/AgCl pH electrode and Fig. 2 a Pt/Pt pH electrode.
In einem Glasgehäuse 1, das als semipermeable Membran 2 am Ende ausgebildet ist, befindet sich der Elektrolyt 3, in welchen die Elektroden 4, 5 eintauchen. Eine Schutzkappe 6 schützt den in einem Gewindegehäuse befindlichen Steckeranschluß 7 für das Spannungsmeßgerät (nicht dargestellt).The electrolyte 3, into which the electrodes 4, 5 are immersed, is located in a glass housing 1, which is designed as a semi-permeable membrane 2 at the end. A protective cap 6 protects the plug connection 7 for the voltage measuring device (not shown), which is located in a threaded housing.
Der Elektrolyt 3 ist in beiden Darstellungen mit Kieselgel verdickte KCl-Lösung, die in jeder Stellung der Meßelektrode die Elektroden und die Glasmembran umgibt.In both representations, the electrolyte 3 is a KCl solution thickened with silica gel, which surrounds the electrodes and the glass membrane in every position of the measuring electrode.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8914033U DE8914033U1 (en) | 1989-11-28 | 1989-11-28 | pH measuring probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8914033U DE8914033U1 (en) | 1989-11-28 | 1989-11-28 | pH measuring probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE8914033U1 true DE8914033U1 (en) | 1990-03-15 |
Family
ID=6844986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8914033U Expired - Lifetime DE8914033U1 (en) | 1989-11-28 | 1989-11-28 | pH measuring probe |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE8914033U1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4131616A1 (en) * | 1991-09-23 | 1993-04-08 | Mahlo Gmbh & Co Kg | Organic and inorganic fabric matter measurement |
| US5382894A (en) * | 1991-08-27 | 1995-01-17 | Mahlo Gmbh & Co. Kg | Method and apparatus for the measurement of contaminants in textiles during continuous processing |
-
1989
- 1989-11-28 DE DE8914033U patent/DE8914033U1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5382894A (en) * | 1991-08-27 | 1995-01-17 | Mahlo Gmbh & Co. Kg | Method and apparatus for the measurement of contaminants in textiles during continuous processing |
| DE4131616A1 (en) * | 1991-09-23 | 1993-04-08 | Mahlo Gmbh & Co Kg | Organic and inorganic fabric matter measurement |
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