DE4104639A1 - Checking seals of breathing masks - using ethanol-sensitive test strip in atmos. contg. ethanol - Google Patents
Checking seals of breathing masks - using ethanol-sensitive test strip in atmos. contg. ethanolInfo
- Publication number
- DE4104639A1 DE4104639A1 DE19914104639 DE4104639A DE4104639A1 DE 4104639 A1 DE4104639 A1 DE 4104639A1 DE 19914104639 DE19914104639 DE 19914104639 DE 4104639 A DE4104639 A DE 4104639A DE 4104639 A1 DE4104639 A1 DE 4104639A1
- Authority
- DE
- Germany
- Prior art keywords
- ethanol
- test
- test strip
- detection
- atmos
- 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.)
- Withdrawn
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 230000029058 respiratory gaseous exchange Effects 0.000 title abstract description 3
- 108010025188 Alcohol oxidase Proteins 0.000 claims abstract description 6
- 150000002978 peroxides Chemical class 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 3
- 230000000241 respiratory effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims 2
- 239000002250 absorbent Substances 0.000 abstract description 6
- 230000002745 absorbent Effects 0.000 abstract description 6
- 102000003992 Peroxidases Human genes 0.000 abstract description 4
- 239000000872 buffer Substances 0.000 abstract description 4
- 239000000654 additive Substances 0.000 abstract description 3
- 108040007629 peroxidase activity proteins Proteins 0.000 abstract description 3
- JRBJSXQPQWSCCF-UHFFFAOYSA-N 3,3'-Dimethoxybenzidine Chemical compound C1=C(N)C(OC)=CC(C=2C=C(OC)C(N)=CC=2)=C1 JRBJSXQPQWSCCF-UHFFFAOYSA-N 0.000 abstract description 2
- NUIURNJTPRWVAP-UHFFFAOYSA-N 3,3'-Dimethylbenzidine Chemical compound C1=C(N)C(C)=CC(C=2C=C(C)C(N)=CC=2)=C1 NUIURNJTPRWVAP-UHFFFAOYSA-N 0.000 abstract description 2
- SNCJAJRILVFXAE-UHFFFAOYSA-N 9h-fluorene-2,7-diamine Chemical compound NC1=CC=C2C3=CC=C(N)C=C3CC2=C1 SNCJAJRILVFXAE-UHFFFAOYSA-N 0.000 abstract description 2
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 abstract description 2
- 231100000053 low toxicity Toxicity 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 3
- 239000002085 irritant Substances 0.000 description 2
- 231100000021 irritant Toxicity 0.000 description 2
- 102100027211 Albumin Human genes 0.000 description 1
- 108010088751 Albumins Proteins 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 108700020962 Peroxidase Proteins 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000008363 phosphate buffer Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000008362 succinate buffer Substances 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 1
- 229940095064 tartrate Drugs 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B27/00—Methods or devices for testing respiratory or breathing apparatus for high altitudes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/26—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving oxidoreductase
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Zoology (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microbiology (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biotechnology (AREA)
- Immunology (AREA)
- Business, Economics & Management (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Emergency Management (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- Genetics & Genomics (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
Description
Die Erfindung betrifft ein Nachweissystem und Verfahren für die Dichtigkeitsprüfung von Atemschutzmasken mit Hilfe eines Teststäbchens, das innerhalb der Atemschutzmaske angebracht ist.The invention relates to a detection system and method for the leak test of respiratory masks with the help of a Test stick attached inside the respirator is.
Dem dichten Sitz von Atemschutzmasken kommt im Hinblick auf die Wirksamkeit der Masken die entscheidende Bedeutung zu. Es hat sich gezeigt, daß die Wirksamkeit in der Praxis eher durch unzureichend dichten Sitz der Maske als durch funktio nelles Versagen begrenzt ist.The tight fit of respirators comes into consideration The effectiveness of the masks is crucial. It has been shown to be more effective in practice due to insufficiently tight fit of the mask than due to functio failure is limited.
Die Prüfungen auf Dichtigkeit einer Atemschutzmaske werden üblicherweise in speziellen Prüfräumen durchgeführt, in denen eine Atmosphäre geschaffen wird, die eine bestimmte Menge eines Reizgases oder Aerosols oder beides enthält. Eine Atemschutzmaske wird dann als ausreichend dichtsitzend ange sehen, wenn vom Träger der Maske der Geruch des Reizstoffes nicht wahrgenommen wird. Es handelt sich dabei um eine quali tative Dichtigkeitsprüfung, die in ihrem Ergebnis außerdem noch sehr stark von der subjektiven Empfindlichkeit des Trägers abhängt.The tests for tightness of a respirator mask are made Usually carried out in special test rooms in which an atmosphere is created that has a certain amount an irritant gas or aerosol, or both. A The respirator is then considered to be sufficiently tight see if from the wearer of the mask the smell of the irritant is not perceived. It is a quali tative leak test, which also results in still very much from the subjective sensitivity of the Carrier depends.
Der Erfindung liegt die Aufgabe zugrunde, eine objektive Anzeige für die Prüfung von Atemschutzmasken auf Dichtigkeit zu finden. Gleichzeitig sollte eine möglichst ungiftige Prüfsubstanz (hoher MAK-Wert) eingesetzt werden, die man in möglichst geringer Konzentration noch nachweisen kann.The invention has for its object an objective Indicator for testing breathing masks for leaks to find. At the same time, one should be as non-toxic as possible Test substance (high MAK value) can be used, which one in can still demonstrate the lowest possible concentration.
Gegenstand der Erfindung ist ein Nachweissystem für die Dichtigkeitsprüfung von Atemschutzmasken in einer Ethanol- Atmosphäre, das ein Teststäbchen zum Nachweis von Ethanol enthält.The invention relates to a detection system for Leak test of respirators in an ethanol Atmosphere containing a test stick for the detection of ethanol contains.
Ein weiterer Gegenstand der Erfindung ist ein Verfahren zur Prüfung der Dichtigkeit von Atemschutzmasken, das dadurch gekennzeichnet ist, daß in einer Ethanol-Atmosphäre der Farbumschlag eines innerhalb der Atemschutzmaske angebrachten Teststäbchens zum Nachweis von Ethanol ausgewertet wird.Another object of the invention is a method for Testing the tightness of respiratory masks, the result is characterized in that in an ethanol atmosphere Color change one inside the respirator Test sticks for the detection of ethanol is evaluated.
Das Teststäbchen zum Nachweis von Ethanol besteht vorzugs weise aus einem in Handel erhältlichen Teststäbchen zum Nachweis von Peroxiden, das mit einer verdünnten Lösung von Alkoholoxidase imprägniert wurde. Als Prüfgas wurde Ethanol gewählt, weil dieser Alkohol einen hohen MAK-Wert hat (1900 mg/m3) und im Prüfraum leicht verdampft werden kann.The test stick for the detection of ethanol consists preferably of a commercially available test stick for the detection of peroxides, which has been impregnated with a dilute solution of alcohol oxidase. Ethanol was chosen as the test gas because this alcohol has a high MAK value (1900 mg / m 3 ) and can be easily evaporated in the test room.
Zur Durchführung der Dichtigkeitsprüfung wird ein Test stäbchen zum Nachweis von Peroxid in die verdünnte Lösung einer Alkoholoxidase getaucht und z. B. mit einem beidseitig klebenden Klebeband in die Atemschutzmaske geklebt. Das kann so erfolgen, daß die Reaktionszone des Teststäbchens von außen durch das Schauglas zu erkennen ist. Die Maske wird danach aufgesetzt und der Träger, z. B. in Feuerwehren, Industriebetrieben, Grubenrettungswesen usw., geht in den Prüfraum, wo er für eine bestimmte Zeit bestimmte Übungen absolviert. Anschließend wird die Reaktionszone des Test stäbchens mit einer Farbskala verglichen.A test is carried out to carry out the leak test sticks for the detection of peroxide in the diluted solution an alcohol oxidase and z. B. with one on both sides adhesive tape stuck in the respirator. That can so that the reaction zone of the test stick from can be seen outside through the sight glass. The mask will then put on and the carrier, e.g. B. in fire departments, Industrial companies, mine rescue services, etc. goes into the Test room where he exercises for a certain time completed. Then the reaction zone of the test chopsticks compared with a color scale.
Das Teststäbchen besteht in der Regel aus einem saugfähigen Träger, der Peroxidase, ein Chromogen (Indikator) und Puffer substanzen enthält. Der saugfähige Träger ist normalerweise Papier, insbesondere Filterpapier. Die gebräuchlichsten Indikatoren für diesen Zweck sind o-Tolidin, Benzidin, o-Dianisidin und 2,7-Diaminofluoren. Als Puffersubstanzen werden meistens Alkaliacetate oder Citrate verwendet, aber auch Borat-, Tartrat-, Succinat- oder Phosphatpuffer können verwendet werden. Häufig enthalten die Teststäbchen auch noch weitere Zusatzstoffe, z. B. Albumin, Gelatine, Polyvinyl alkohol und/oder Polyvinylpyrrolidon. Die saugfähigen Träger werden im allgemeinen mit den Reagenzien getränkt, vorzugs weise mit zwei oder mehreren Lösungen nacheinander, wobei meistens eine Lösung den Indikator in einem leicht flüchtigen organischen Lösungsmittel enthält, während die zweite Tränklösung den Puffer, die Peroxidase und eventuell weitere Zusatzstoffe in wässeriger Lösung enthält. Der Gehalt an Peroxidasen in der Tränklösung sollte zweckmäßig mindestens 20 mg/100 ml, vorzugsweise etwa 30-50 mg/100 ml, betragen. Die säugfähigen Träger werden im allgemeinen auf Folienbänder aufgeklebt oder aufgesiegelt und bilden dann die eigentliche Reaktionszone der so erhaltenen Teststäbchen. The test stick usually consists of an absorbent Carrier, the peroxidase, a chromogen (indicator) and buffer contains substances. The absorbent carrier is usually Paper, especially filter paper. The most common Indicators for this purpose are o-tolidine, benzidine, o-dianisidine and 2,7-diaminofluorene. As buffer substances Alkaline acetates or citrates are mostly used, but Borate, tartrate, succinate or phosphate buffers can also be used be used. Often the test sticks also contain other additives, e.g. B. albumin, gelatin, polyvinyl alcohol and / or polyvinylpyrrolidone. The absorbent carrier are generally soaked with the reagents, preferably wise with two or more solutions in succession, whereby mostly a solution the indicator in a volatile contains organic solvents, while the second Impregnation solution the buffer, the peroxidase and possibly others Contains additives in aqueous solution. The content of Peroxidases in the soaking solution should be at least expedient 20 mg / 100 ml, preferably about 30-50 mg / 100 ml. The absorbent carriers are generally on foil tapes glued or sealed and then form the actual one Reaction zone of the test sticks thus obtained.
Bei einer weiteren Ausführungsform des Nachweissystem nach der Erfindung wird der saugfähige Träger des Teststäbchens zum Nachweis von Peroxiden mit einer Lösung von Alkoholoxi dase (2-20 U/ml) getränkt und getrocknet. Für den Benutzer ist es vor der Anwendung nur noch erforderlich, das Stäbchen mit Wasser zu befeuchten.In a further embodiment of the detection system according to the invention becomes the absorbent carrier of the test stick for the detection of peroxides with a solution of alcohol oxi dase (2-20 U / ml) soaked and dried. For the user it is only necessary to use the stick before use to moisten with water.
Der Nachweis mit dem erfindungsgemäßen System ist so empfind lich, daß noch eine positive Anzeige, d. h. eine Verfärbung der Reaktionszone von weiß nach blau, erfolgt, wenn nur ein Tausendstel des MAK-Wertes des Ethanols (1 ppm) in die Maske gelangt.The detection with the system according to the invention is so sensitive Lich that there is still a positive indication, i. H. a discoloration the reaction zone from white to blue takes place if only one Make a thousandth of the MAK value of the ethanol (1 ppm) in the mask reached.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19914104639 DE4104639A1 (en) | 1991-02-15 | 1991-02-15 | Checking seals of breathing masks - using ethanol-sensitive test strip in atmos. contg. ethanol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19914104639 DE4104639A1 (en) | 1991-02-15 | 1991-02-15 | Checking seals of breathing masks - using ethanol-sensitive test strip in atmos. contg. ethanol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE4104639A1 true DE4104639A1 (en) | 1992-08-20 |
Family
ID=6425098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19914104639 Withdrawn DE4104639A1 (en) | 1991-02-15 | 1991-02-15 | Checking seals of breathing masks - using ethanol-sensitive test strip in atmos. contg. ethanol |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE4104639A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4214239A1 (en) * | 1992-04-30 | 1993-11-04 | Draegerwerk Ag | RESPIRATORY MASK WITH AN INDICATOR |
| CN102023073A (en) * | 2010-10-21 | 2011-04-20 | 徐州建筑职业技术学院 | Method for detecting wall leakage |
| DE102018203842A1 (en) * | 2018-03-14 | 2019-09-19 | Robert Bosch Gmbh | Sensor day for the detection of fine dust particles and dust mask |
-
1991
- 1991-02-15 DE DE19914104639 patent/DE4104639A1/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4214239A1 (en) * | 1992-04-30 | 1993-11-04 | Draegerwerk Ag | RESPIRATORY MASK WITH AN INDICATOR |
| CN102023073A (en) * | 2010-10-21 | 2011-04-20 | 徐州建筑职业技术学院 | Method for detecting wall leakage |
| CN102023073B (en) * | 2010-10-21 | 2013-09-11 | 徐州建筑职业技术学院 | Method for detecting wall leakage |
| DE102018203842A1 (en) * | 2018-03-14 | 2019-09-19 | Robert Bosch Gmbh | Sensor day for the detection of fine dust particles and dust mask |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |