DE1000170B - Test tube for the quantitative determination of vapors of hydrofluoric acid and volatile fluorides - Google Patents
Test tube for the quantitative determination of vapors of hydrofluoric acid and volatile fluoridesInfo
- Publication number
- DE1000170B DE1000170B DEA23094A DEA0023094A DE1000170B DE 1000170 B DE1000170 B DE 1000170B DE A23094 A DEA23094 A DE A23094A DE A0023094 A DEA0023094 A DE A0023094A DE 1000170 B DE1000170 B DE 1000170B
- Authority
- DE
- Germany
- Prior art keywords
- hydrofluoric acid
- test tube
- quantitative determination
- vapors
- hydrochloric acid
- 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.)
- Pending
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
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
Prüfröhrchen für die quantitative Bestimmung von Dämpfen der Flußsäure und flüchtiger Fluoride Die Erfindung betrifft! ein mit körnigen Reaktions-und Anzeigestoffen gefülltes Prüfröhrchen zum quantitativen Nachweis von- in der Luft und anderen Gasen enthaltenen Dämpfen der Flußsäure und flüchtigeir Fluoride. Sie liegt darin, daß der Reaktions- und, Anzeigestoff aus auf einem Trägerstoff, wie Kieselgel, Bims od. dgl., aufgebrachtem Eise nrhodanid, dem eine geringe Salzsäuremenge zugesetzt ist, besteht.Test tube for the quantitative determination of hydrofluoric acid vapors and volatile fluorides The invention relates to! one with granular reactants and indicators Filled test tube for the quantitative detection of - in the air and other gases containing fumes of hydrofluoric acid and volatile fluoride. It is that the reaction and display substance on a carrier such as silica gel, pumice or the like, applied iron rhodanide to which a small amount of hydrochloric acid was added is, exists.
Der Anzeigestoff wird gemäß der Erfindung zweckmäßig so hergestellt, daß der Trägerstoff, z. B. das Kieselgel, mit einer ätherischen Eisen-Rhodanid-Lösung getränkt wird, der vorher einige Tropfen kon zentriefrter Salzsäure zugegeben, wurden. Dann wird der Äther von dem körnigen Anzeigestoff abgetrieben. Im nunmehr trockenen Zustand wird die Anzeigemasse in. die Röhrchen eingefüllt. Dann werden die Röhrchen zugeschmolzen.According to the invention, the display material is expediently produced in such a way that that the carrier, e.g. B. the silica gel, with an essential iron-rhodanide solution is soaked, which previously added a few drops of concentrated hydrochloric acid. Then the ether is driven off by the granular indicator substance. In the now dry State, the display compound is poured into the tubes. Then the tubes melted shut.
Bei der Herstellung der Anzeigemasse macht sich folgendes bemerkbar: Wenn die ätherische Eisen Rhodanid-Lösung, der einige Tropfen Salzsäure zugesetzt sind, auf die Trägersubstanz aufgetragen wi@rdi, so ist die entstehende Masse zuerst rötlich gefärbt. Beim Abdampfen des Äthers an der Luft wird die Masse aber 'hellgelb bis farblos.The following is noticeable during the production of the display mass: When the essential iron rhodanide solution, which added a few drops of hydrochloric acid are, wi @ rdi applied to the carrier substance, the resulting mass is first colored reddish. When the ether evaporates in the air, however, the mass becomes' light yellow to colorless.
Beim Durchtritt von Flußsäu-redämpfen in die Anzeigemasse tritt nun wider Erwarten nicht eine weitere Entfärbung ein, sondern es tritt eine starke Rotfärbung auf, die bei weiterem Verlauf des Durchbritts nach oben als Zone fortwandert.When river acid steams pass into the display mass, now occurs Contrary to expectations, there is no further discoloration, but a strong red coloration which, as the breakthrough continues, moves upwards as a zone.
Das Fortschreiten dieser Zone, hinter der wieder eine Entfärbung eintritt, ist das Maß für die Konzentration der Flußsäure in dem geprüften Luftvolumen.The progression of this zone, behind which a discoloration occurs again, is the measure for the concentration of hydrofluoric acid in the tested air volume.
Im Gegensatz zur Flußsäure tritt bei Durchtritt von Salzsäure in die Anzeigemasse des Röhrchens eine völlige Entfärbung der gelben Schicht ein.In contrast to hydrofluoric acid, hydrochloric acid enters the Indicator mass of the tube shows a complete discoloration of the yellow layer.
Beispiel Die Anzeigenrasse wird wie folgt hergestellt: io g Kieselgel wird mit io ml einer o,5o/oigen ätherischen Eisen-Rhodanid-Lösung, der 3 Tropfen konzentriertes IICI (i,i9) zugesetzt sind, versetzt. Die Masse wird unter öfterem Umrühren an der Luft stehengelassen, bis sie hellrötlichgelb geworden und rieselnd ist. Sie wird dann, wie üblich verfüllt. Die ätherische Eisen-Rhodanid-Lösung stellt man her, indem man in. je ioo ml Wasser o,95 g Fe Cl#3- 6 H20 und o,8 g N H4 C N S löst, beide Lösungen zusammengibt und aus dieser tiefroten, o,5fl/oigen, wäßrigen Lösung das E,ilsenrhodanid ausäthert, so daß am Schluß die ätherische Lösung wieder Zoo ml beträgt.Example The display breed is made as follows: io g of silica gel is mixed with 10 ml of a 0.5% essential iron-rhodanide solution containing 3 drops concentrated IICI (i, i9) are added. The crowd gets under more often Stir in the air until they have turned light reddish yellow and trickling is. It is then backfilled as usual. The essential iron-rhodanide solution represents by adding o.95 g Fe Cl # 3-6 H20 and 0.8 g N H4 C N in. 100 ml of water each S dissolves, brings both solutions together and from this deep red, 0.5% aqueous Solution that ethers out the E, ilsenrhodanid, so that at the end the ethereal solution is restored Zoo ml is.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA23094A DE1000170B (en) | 1955-07-19 | 1955-07-19 | Test tube for the quantitative determination of vapors of hydrofluoric acid and volatile fluorides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA23094A DE1000170B (en) | 1955-07-19 | 1955-07-19 | Test tube for the quantitative determination of vapors of hydrofluoric acid and volatile fluorides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1000170B true DE1000170B (en) | 1957-01-03 |
Family
ID=6925351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEA23094A Pending DE1000170B (en) | 1955-07-19 | 1955-07-19 | Test tube for the quantitative determination of vapors of hydrofluoric acid and volatile fluorides |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1000170B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4933144A (en) * | 1987-03-12 | 1990-06-12 | Dragerwerk Aktiengesellschaft | Colorimetric gas measuring device for fluorine |
-
1955
- 1955-07-19 DE DEA23094A patent/DE1000170B/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4933144A (en) * | 1987-03-12 | 1990-06-12 | Dragerwerk Aktiengesellschaft | Colorimetric gas measuring device for fluorine |
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