DE880956C - Procedure for the detection of solvent fumes - Google Patents
Procedure for the detection of solvent fumesInfo
- Publication number
- DE880956C DE880956C DED10732A DED0010732A DE880956C DE 880956 C DE880956 C DE 880956C DE D10732 A DED10732 A DE D10732A DE D0010732 A DED0010732 A DE D0010732A DE 880956 C DE880956 C DE 880956C
- Authority
- DE
- Germany
- Prior art keywords
- detection
- solvent
- camphor
- procedure
- solvent fumes
- 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
- 239000002904 solvent Substances 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 9
- 238000001514 detection method Methods 0.000 title claims description 6
- 239000003517 fume Substances 0.000 title 1
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 claims description 11
- 241000723346 Cinnamomum camphora Species 0.000 claims description 10
- 229960000846 camphor Drugs 0.000 claims description 10
- 229930008380 camphor Natural products 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 239000013078 crystal Substances 0.000 description 5
- 239000000975 dye Substances 0.000 description 5
- 238000002845 discoloration Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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
Verfahren zum Nachweis von Lösungsmitteldämpfen Die Erfindung betrifft ein Verfahren zum Nachweis von Lösungsmitteldämpfen. Derartige Verfahren werden beispielsweise angewendet, um festzustellen, ob Absorptionsfilter einer Lösungsmittelrückgewinnungsanlage gesättigt sind und dann Lösungsmitteldämpfe durchlassen. Bei derartigen Verfahren wird eine hohe Empfindlichkeit erstrebt, damit das Durchtreten von Lösungsmitteldämpfen durch das Filter sofort angezeigt wird.Method for the detection of solvent vapors The invention relates to a method for the detection of solvent vapors. Such procedures will be for example used to determine whether absorption filters of a solvent recovery system are saturated and then allow solvent vapors to pass through. With such procedures A high level of sensitivity is sought to prevent the passage of solvent vapors through the filter is displayed immediately.
Es wurde bereits vorgeschlagen, zum Nachweis von Lösungsmitteldämpfen in Luft oder anderen Gasen diese huber Kristalle des natürlichen Kampfers zu leiten. Dieser löst offenbar begierig die Lösungsmitteldämpfe, da die Kampferkristalle schon bei sehr kleinen Lösungsmittelkonzentrationen in der Größenordnung von etwa 1 : IO 000 sich auflösen. It has already been suggested for the detection of solvent vapors in air or other gases these huber crystals of natural camphor to conduct. This apparently eagerly dissolves the solvent vapors, since the camphor crystals already at very low solvent concentrations of the order of about 1: IO 000 dissolve.
Dieses Verfahren hat jedoch den Nachteil, daß das Auflösen der Kampferkristalle nur schlecht beobachtet werden kann.However, this method has the disadvantage that the dissolution of the camphor crystals can only be observed poorly.
Die Erfindung vermeidet diesen Nachteil. Sie besteht darin, daß der Kampfer mit einem in organischen Lösungsmitteln löslichen Farbstoffpulver gemischt angewendet wird. Eine vorteilhafte Ausführungsform besteht dabei darin, daß die Kampferkristalle mit einem Überzug von Farbstoffpuder versehen sind. Als Farbstoffe können beispielsweise Azofarbstoffe verwendet werden. DasKampfer-Farbstoffpulver-Gemisch bzw. der mit einem Puderübserzug versehene Kampfer kann in üblicher Weise in Prüfröhrchen verfüllt werden, durch die die zu untersuchende Luft gesaugt wird. Der Indikator kann auch z. B. auf indifferente Träger fixiert oder z. B. in durchsichtige Prüfrohrleitungen einer Lösungsmittelrückgewinnungsanlage eingelegt wer- den. Wird lösungsmittelhaltige Luft über einen derartigen Indikator geleitet, dann bildet sich zunächst an der Grenzfläche eine Kampferlösung im nachzuweisenden Lösungsmittel, in der der Farbstoff sich unter intensiver Verfärbung auflöst. Man beobachtet also eine intensive Verfärbung der durch das Auge kaum erkennbar schmelzenden Kampferkristalle, d. h. eine intensive Verfärbung des ursprünglich wenig intensiv gefärbten Indikatormaterials. Das erfindungsgemäße Verfahren hat den Vorteil, daß die Empfindlichkeit der Nachweisreaktion ganz erheblich gesteigert und die Ablesesicherheit erhöht werden. Mit dem erfindungsgemäßen Verfahren lassen sich z. B. schon Spuren in der oben angegebenen Größenordnung von z; B. The invention avoids this disadvantage. It consists in the Camphor mixed with a dye powder that is soluble in organic solvents is applied. An advantageous embodiment is that the Camphor crystals are coated with dye powder. As dyes For example, azo dyes can be used. The camphor dye powder mixture or the camphor provided with a powder coating can be put into test tubes in the usual way be filled, through which the air to be examined is sucked. The indicator can also z. B. fixed on indifferent carriers or z. B. in transparent test pipes be inserted into a solvent recovery system the. Will Solvent-containing air passed over such an indicator, then forms First, a camphor solution in the solvent to be detected forms at the interface, in which the dye dissolves with intense discoloration. So one observes intense discoloration of the melting camphor crystals, which are barely noticeable to the eye, d. H. an intense discoloration of the indicator material, which was originally not very intensely colored. The inventive method has the advantage that the sensitivity of the detection reaction can be increased considerably and the reliability of reading increased. With the invention Process can be z. B. already traces in the order of magnitude given above z; B.
Trichloräthylendämpfen in der Absaugeluft einer Regenerierungsanlage feststellen.Trichlorethylene vapors in the exhaust air of a regeneration system determine.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED10732A DE880956C (en) | 1951-11-10 | 1951-11-10 | Procedure for the detection of solvent fumes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED10732A DE880956C (en) | 1951-11-10 | 1951-11-10 | Procedure for the detection of solvent fumes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE880956C true DE880956C (en) | 1953-06-25 |
Family
ID=7033439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DED10732A Expired DE880956C (en) | 1951-11-10 | 1951-11-10 | Procedure for the detection of solvent fumes |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE880956C (en) |
-
1951
- 1951-11-10 DE DED10732A patent/DE880956C/en not_active Expired
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