DE929516C - Detector tubes for the detection and measurement of water vapor in air or other gases - Google Patents
Detector tubes for the detection and measurement of water vapor in air or other gasesInfo
- Publication number
- DE929516C DE929516C DEA17676A DEA0017676A DE929516C DE 929516 C DE929516 C DE 929516C DE A17676 A DEA17676 A DE A17676A DE A0017676 A DEA0017676 A DE A0017676A DE 929516 C DE929516 C DE 929516C
- Authority
- DE
- Germany
- Prior art keywords
- water vapor
- gases
- detection
- air
- measurement
- 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
- 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
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
- G01N31/222—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating moisture content
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Biophysics (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)
Description
Spürröhrchen für den Nachweis und zur Messung von Wasserdampf in Luft oder anderen Gasen Die Erfindung betrifft den Nachweis und die Messung von Wasserdampf in Laft und oder anderen Gasen.Detector tubes for the detection and measurement of water vapor in air or other gases The invention relates to the detection and measurement of water vapor in Laft and or other gases.
Während man seit langen die Wasserdampfmesimg durch die Aufnahme des Wasserdampfes an hygroskopischen Stoffen und Wägung derselben durchfübrite, ist auch ein Spürrörchen bekannt geworden, durch das die Erkennung und Messung des Wasserdampfgehaltes mittels einer Farbreaktion bewirkt wird. Die Füllung dieses Röhrechens bestcht aus einem hochgetrochneten Kieselgel, welches mit einer kolloidalen Lösung von Selen in wasserfreier Schwefelsäure beladen ist. Beim Hindurchschicken wasserhaltiger Gase verfärbt sich dieses Gel nach Maßgale des aufgenommenen Wassers, so daß aus der Menge des verfärbten Gels und somit der Schichthöhe in den Röhrchen eine Aussge über die aufgenommene Wassermenge gemacht werden kann. aus der sich der Wasserdampfgehalt der Luft errechnen läßt. While one has long been the water vapor mesimg through the inclusion of the water vapor on hygroscopic substances and weighing them, has also become known a sniffer, through which the detection and measurement of the Water vapor content is effected by means of a color reaction. The filling of this The small tube is made of a highly dried silica gel, which is mixed with a colloidal Solution of selenium in anhydrous sulfuric acid is loaded. When sending through water-containing gases, this gel changes color according to the proportions of the absorbed water, so that from the amount of discolored gel and thus the layer height in the tube an assessment can be made of the amount of water absorbed. from the the water vapor content of the air can be calculated.
Bei dem bekannten Röhrchen ist die Verarbeitung des Gels mit der wasserfreien Schwefelsäure oder Schwefeltrioxyd störend und durch die dazu not wendige Apparatur kostpielig. In the case of the known tube, the processing of the gel with the anhydrous sulfuric acid or sulfur trioxide disruptive and due to the necessary Apparatus expensive.
Demgegenüber besteht die Erfindung darin, daß die Füllung des Röhrchens aus einem Kieselgel besteht, das mit einem Erdalkalisalz des Phenolphthalt#eins, des Tetrachlorphenolphthaleins oder eines älnlichen Indikatorstoffes und Ammoniak beladen und zur völligen Trockenheit gebracht ist. In contrast, the invention consists in that the filling of the tube consists of a silica gel, which is mixed with an alkaline earth salt of phenolphalt # one, of tetrachlorophenolphthalein or a similar indicator substance and ammonia loaded and brought to complete dryness.
Als Erdalkalisalz des betreffenden Indikatorstoffes haben sich besonders die Bariumsalze als geeigner erwiesen. As the alkaline earth salt of the indicator substance in question, in particular the barium salts proved more suitable.
Zur Herstellung der Reaktionsmasse des Röhrebens geht man so vor, daß das Kieselgel mit dem Gemisch einer Bariumhydroxydlösung und einer Lösung des Indikatorstoffes getränkt und bei Erwärmung über Ioo mit trockenem Ammoniakgas behandelt wird. To produce the reaction mass of the tube, one proceeds as follows: that the silica gel with the mixture of a barium hydroxide solution and a solution of the indicator substance and soaked with dry ammonia gas when heated above 100% is treated.
Herstellungsbeispiel Bei der Herstellung der Masse zur Röhrchenfüllung verfährt man z. B. wie folgt: Zu 70 ml 50/oiger Bariumhydroxydlösung gibt man 0,I g Tetrachlorphenolphthalein, das vorher in 30 ml Alkohol gelöst wurde, und bringt 10 ml der stark rot gefärbten Lösung auf 10 g mittelporiges, nicht vorher getrocknetes Kieselgel. Die tiefrote Lösung entfärbt sich sofort im Gel. Dieses so vorbereitete Gel wird nun im Trockenschrank bei etwa I20° C so lange getrocknet und gleichzeitig mit trockenem Ammoniakgas behandelt, bis es wieder eine starke Rotfärbung angenommen hat. Die rote Gelmasse wird sofort luft- und wasserdampfdicht eingeschlossen und muß unter Vermeidung des Zutritts von feuchter Luft in die Röhrchen verfüllt werden, die sofort abgeschmolzen werden. Production example In the production of the compound for filling the tube if you proceed z. B. as follows: To 70 ml of 50% barium hydroxide solution is added 0.1 g of tetrachlorophenolphthalein, which was previously dissolved in 30 ml of alcohol, and brings 10 ml of the strongly red colored solution to 10 g of medium-pored, not previously dried Silica gel. The deep red solution immediately discolored in the gel. This so prepared The gel is then dried in the drying cabinet at around 120 ° C for as long and at the same time treated with dry ammonia gas until it turns a strong red color again Has. The red gel mass is immediately enclosed in airtight and water vapor-tight manner and must be filled into the tubes avoiding the entry of moist air, which are melted off immediately.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA17676A DE929516C (en) | 1953-03-25 | 1953-03-25 | Detector tubes for the detection and measurement of water vapor in air or other gases |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA17676A DE929516C (en) | 1953-03-25 | 1953-03-25 | Detector tubes for the detection and measurement of water vapor in air or other gases |
Publications (1)
Publication Number | Publication Date |
---|---|
DE929516C true DE929516C (en) | 1955-06-27 |
Family
ID=6923951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA17676A Expired DE929516C (en) | 1953-03-25 | 1953-03-25 | Detector tubes for the detection and measurement of water vapor in air or other gases |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE929516C (en) |
-
1953
- 1953-03-25 DE DEA17676A patent/DE929516C/en not_active Expired
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