DE933711C - Detector tubes for the detection and quantitative determination of benzene in air and / or other gases - Google Patents

Detector tubes for the detection and quantitative determination of benzene in air and / or other gases

Info

Publication number
DE933711C
DE933711C DEA17736A DEA0017736A DE933711C DE 933711 C DE933711 C DE 933711C DE A17736 A DEA17736 A DE A17736A DE A0017736 A DEA0017736 A DE A0017736A DE 933711 C DE933711 C DE 933711C
Authority
DE
Germany
Prior art keywords
detection
benzene
air
gases
quantitative determination
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
Application number
DEA17736A
Other languages
German (de)
Inventor
Hermann Dr Heidrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Auergesellschaft GmbH
Original Assignee
Auergesellschaft GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Auergesellschaft GmbH filed Critical Auergesellschaft GmbH
Priority to DEA17736A priority Critical patent/DE933711C/en
Application granted granted Critical
Publication of DE933711C publication Critical patent/DE933711C/en
Expired legal-status Critical Current

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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

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  • 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 für die quantitative Bestimmung von Benzol in Luft und/oder anderen Gasen Die Erfindung betrifft ein Spürröhrchen für den Nachweis und für die quantitative Bestimmung von Benzol in Luft und/oder anderen Gasen.Detector tubes for detection and quantitative determination of benzene in air and / or other gases The invention relates to a detection tube for the detection and quantitative determination of benzene in air and / or other gases.

Für den Zweck der Bestimmung von Benzoldämpfen in Luft sind zwei Arten von Spürröhrchen bekannt. Die Füllung des einen Röhrchens besteht aus einem Gel, welches mit einer Lösung von Paraformaldehyd und Dimethylsulfat in konzentrierter Schwefelsäure beladen ist. Die Füllung der zweiten Röhrchenart besteht ebenfalls aus einem Gel, welches mit einer Lösung von Kaliumkobaltinitrit in konzentrierter Schwefelsäure beladen ist.For the purpose of determining benzene vapors in air are of two types known from detection tubes. The filling of one tube consists of a gel, which is concentrated with a solution of paraformaldehyde and dimethyl sulfate Sulfuric acid is loaded. The filling of the second type of tube also exists from a gel, which is concentrated with a solution of potassium cobalt nitrite in Sulfuric acid is loaded.

Die erste Röhrchenart zeigt den Nachteil, daß Dimethylsulfat ein außerordentlich giftiger Stoff ist, der bei Berührung mit der Haut zu ernsten Nervenschädigungen führt. Aus diesem Grunde ist die Herstellung mit Schwierigkeiten verbunden, da man bei der Verarbeitung dieses Stoffes mit größter Vorsicht verfahren muß. Auch die Herstellung des zweiten Röhrchens ist insofern schwierig, als mit völlig wasserfreier konzentrierter Schwefelsäure gearbeitet werden muß.The first type of tube has the disadvantage that dimethyl sulfate is an extremely is a poisonous substance which, if it comes into contact with the skin, causes serious nerve damage leads. For this reason, the production is difficult because one must proceed with the greatest care when processing this material. Also the Making the second tube is difficult in that it is completely anhydrous concentrated sulfuric acid must be worked.

Demgegenüber besteht die Erfindung darin, daß das Röhrchen eine Füllung aus mit einer Lösung von Antimonpentachlorid in Tetrachlorkohlenstoff beladenem, getrocknetem Kieselgel besitzt. Die Gelmasse sieht farblos aus und verfärbt sich bei Aufnahme von Benzol und seinen Homologen nach gelb bis braunschwarz. Um die Zersetzung des Antimonpentachlorids durch den Wasserdampf der Prüfluft zu vermeiden, ist der Anzeigeschicht vorteilhaft eine wasserdampfbindende Schicht vorgeschaltet.In contrast, the invention consists in the fact that the tube has a filling from loaded with a solution of antimony pentachloride in carbon tetrachloride, has dried silica gel. The gel mass looks colorless and discolored yellow to brownish black when benzene and its homologues are added. To the To avoid decomposition of the antimony pentachloride by the steam in the test air, the display layer is advantageously preceded by a water vapor-binding layer.

Zur Herstellung der Gel-Masse geht man wie folgt vor: Man löst 5o g Antimonpentachlorid in i 5o ml Tetrachlorkohlenstoff und tränkt ioog hochgetrocknetes, mittelporiges Kieselgel mit 6o ccm obiger Lösung. Das Gel befindet sich beim Beladen in einer Glasstopfenflasche und muß unter Ausschluß der Luftfeuchtigkeit in die Röhrchen eingefüllt werden. Die Röhrchen werden sofort abgeschmolzen.To prepare the gel mass, proceed as follows: Dissolve 50 g of antimony pentachloride in 50 ml of carbon tetrachloride and soaks 100% of highly dried, medium-pored silica gel with 60 ccm of the above solution. The gel is in the process of loading in a glass stopper bottle and must be excluded the humidity be filled into the tubes. The tubes are melted immediately.

Claims (2)

PATENTANSPRÜCHE: i. Spürröhrchen für den Nachweis und die quantitative Bestimmung von Benzol in Luft und/ oder anderen Gasen, gekennzeichnet durch eine Füllung aus getrocknetem Kieselgel, welches mit einer Lösung von Antimonpentachlorid in Tetrachlorkohlenstoff beladen ist. PATENT CLAIMS: i. Detector tubes for detection and quantitative Determination of benzene in air and / or other gases, indicated by a Filling of dried silica gel, which is filled with a solution of antimony pentachloride is loaded in carbon tetrachloride. 2. Spürröhrchen nach Anspruch i, dadurch gekennzeichnet, daß der Anzeigeschicht eine wasserdampfbindende Masse vorgeschaltet ist.2. detection tube according to claim i, characterized in that that the display layer is preceded by a water-vapor-binding mass.
DEA17736A 1953-04-02 1953-04-02 Detector tubes for the detection and quantitative determination of benzene in air and / or other gases Expired DE933711C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA17736A DE933711C (en) 1953-04-02 1953-04-02 Detector tubes for the detection and quantitative determination of benzene in air and / or other gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA17736A DE933711C (en) 1953-04-02 1953-04-02 Detector tubes for the detection and quantitative determination of benzene in air and / or other gases

Publications (1)

Publication Number Publication Date
DE933711C true DE933711C (en) 1955-09-29

Family

ID=6923964

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA17736A Expired DE933711C (en) 1953-04-02 1953-04-02 Detector tubes for the detection and quantitative determination of benzene in air and / or other gases

Country Status (1)

Country Link
DE (1) DE933711C (en)

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