DE3529670A1

DE3529670A1 - Micro-COD apparatus for hydrogen chloride absorption

Info

Publication number: DE3529670A1
Application number: DE19853529670
Authority: DE
Inventors: Erfinder Wird Nachtraeglich Benannt Der
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-08-20
Filing date: 1985-08-20
Publication date: 1987-02-26

Abstract

The application relates to a micro-COD apparatus for hydrogen chloride determination, which makes it possible to achieve the objectives of the previously known (see references) COD filter cartridges even on a micro scale. It consists of a small filter cartridge made of sintered special glass, quartz glass or a plastic having the porosities 0, 1 or 2, merging with a glass tube or plastic tube having a silicone seal with a teflon sleeve clipped over it and ending in a standard ground joint sleeve. This cartridge is inserted into a commercial COD tube having an external diameter of 16 mm and thus permits COD determinations using small amounts of sample.

Description

Es ist bekannt, daß bei der CSB-Bestimmung Chlorid- Ionen bei einem Gehalt von mehr als 1g/l die Messung stören und man zur Sicherheit die Chlorid-Ionen vor der Messung abreichern muß. In der DIN-Vorschrift 38 409, Teil 41, Deutsche Einheitsverfahren zur Wasser-, Abwasser- und Schlammuntersuchung, Summarische Wirkungs- und Stoffkenngrößen (Bestimmung des Sauerstoffbedarfs -CSB- im Bereich über 15 mg/l) wird ausführlich auf die Chlorid-Eliminierung eingegangen. Zum Einsatz kamen dabei Filterkerzen, Filterrohre, Etagenfilterkerzen etc., wie sie in verschiedenen Patent- und Gebrauchsmuster-Anmeldungen beschrieben sind (siehe Anhang).It is known that when determining COD, chloride Ions at a content of more than 1g / l the measurement disrupt and for safety the chloride ions of the measurement. In the DIN regulation 38 409, part 41, German standard procedures for water, Wastewater and sludge inspection, summary Effect and substance parameters (determination of the oxygen requirement -CSB- in the range above 15 mg / l) is detailed dealt with the chloride elimination. Filter candles, filter tubes, Floor filter candles etc., as used in different Patent and utility model applications described are (see appendix).

Neuerdings geht wie überall im Labor der Trend zu kleinen Proben und Schnellverfahren. Sehr oft wird die CSB-Bestimmung jetzt photometrisch in kleinen handelsüblichen Küvetten-Röhrchen mit Schraubgewinde GL 14 durchgeführt (Zeichnung, Nr. A). Eine Apparatur passend zu diesem System zur Abreicherung der Chlorid-Ionen in einem Arbeitsgerät existiert bis dato noch nicht. Diese Mikro-CSB- Apparatur ist Gegenstand dieser Anmeldung.Recently, as everywhere in the laboratory, the trend is on small samples and rapid procedures. Very often the COD determination is now photometric in small commercially available cuvette tubes with screw thread GL 14 carried out (drawing, No. A). An apparatus suitable for this system for depletion of chloride ions in an implement does not yet exist. This micro COD Equipment is the subject of this application.

Beschreibungdescription

Passend zu dem in Abb. A. gezeigten handelsüblichen Röhrchen wurde eine CSB-Filterkerze mit Normschliff-Hülse und eingearbeiteter GL-Gewinde- Kappe (handelsübliche Kappe, z. B.Schott, Bestell-Nr. 29 227 05) sowie eingearbeiteter Silikon-Dichtung mit aufgearbeiteter PTFE-Stulpe (handelsüblich, z. B. Schott Bestell-Nr. 29 234 06) entwickelt. In der beigefügten Zeichnung hat die Schraubkappe die Nr. B-2, die Dichtung die Nr. B-3.To match the commercially available tube shown in Fig. A., a COD filter cartridge with a standard ground sleeve and integrated GL thread cap (standard cap, e.g. bulkhead, order no. 29 227 05) as well as an integrated silicone seal with refurbished PTFE gauntlet (commercially available, e.g. Schott order no. 29 234 06). In the attached drawing the screw cap has the number B-2, the seal the number B-3.

Der komplette übrige Körper besteht aus Borosilikat- Glas 3.3, handelsüblich, z. B. DURAN von Schott. Am oberen Ende sitzt eine Schliffhülse, bevorzugt NS 14 oder kleiner, daran angesetzt ein bevorzugt 6 mm dickes Glasrohr, auf welches Schraubkappe und Dichtung aufgeschoben werden. Dann wird ein 9 mm dickes Glasrohr angesetzt, welches am unteren Ende die Glasfilterkerze trägt. Diese Filterkerze aus gesintertem Borosilikatglas hat bevorzugt eine Porosität zwischen 0 und 2, besonders bevorzugt die Porosität 1. Der Durchmesser der Filterkerze beträgt 8-9 mm, die Länge 20-25 mm. Alle Glasteile sind vom Glasbläser sp aneinander gesetzt, daß die Gesamtlänge der Apparatur etwa 115 mm beträgt. So kann diese Filterkerze in das Spezialröhrchen eingeführt und mittels Schraubkappe fest und dicht aufgeschraubt werden. Die Höhe des Flüssigkeitsstandes in dem Röhrchen ist so, daß die Kerze im Luftraum über der Flüssigkeit steht. Innerhalb der Silicon-Dichtung ist die Kerze leicht zu verschieben. Von oben kann die Kerze durch den Schliff mit Absorptionsmittel befüllt und dann verschlossen werden.The entire rest of the body is made of borosilicate Glass 3.3, commercially available, e.g. B. DURAN from Schott. At the a ground sleeve, preferably NS 14, sits at the upper end or smaller, preferably 6 mm thick glass tube, on which screw cap and seal be postponed. Then a 9 mm thick one Glass tube attached, which at the lower end of the glass filter candle wearing. This filter candle made of sintered Borosilicate glass preferably has a porosity between 0 and 2, particularly preferably the porosity 1. The The diameter of the filter candle is 8-9 mm, the length 20-25 mm. All glass parts are sp from each other set that the total length of the apparatus is about 115 mm. So this filter cartridge in inserted the special tube and using a screw cap be screwed tight and tight. The height of the liquid level in the tube is such that the candle is in the air space above the liquid. The candle is light within the silicone seal to postpone. The candle can be seen from above Sanded section filled with absorbent and then closed will.

Claims

1. Micro-COD apparatus with COD filter candle for hydrogen chloride absorption consisting of a commercially available COD / COD tube with preferably 16 mm outer diameter (drawing A) and a tube body of length 85 mm and a screw thread made of glass at the upper end, whereby this screw thread can be, for example, the commercially available GL thread 14 from Schott, as well as consisting of a newly developed HCl absorber, which consists of a microfilter candle (drawing B, No. 5) made of borosilicate glass 3.3 with porosity 0, 1 or 2 Porosity 1, with an attached glass tube of the same outer diameter as the filter candle, which preferably has an outer diameter of 8-9 mm, whereby this glass tube merges after approximately 15 to 25 mm into a glass tube with an outer diameter of 6 mm, via which the silicone seal with Teflon cuff (No. 3 ) and the screw thread cap is preferably inserted with GL14, and this glass tube then merges into a standard ground joint (sleeve NS 14, for example) d whereby a total length of approximately 115 mm is then achieved, divided into approximately 20-25 mm for the candle, 55 mm for the intermediate piece and 35-40 mm for the NS sleeve with shoulder, and the entire apparatus from top to bottom is completely hollow for filling with absorbents, the candle is closed at the bottom, the NS sleeve can be closed with an NS plug.

2. Micro COD apparatus for hydrogen chloride absorption according to claim 1, characterized in that that especially the GL threaded screw cap together associated silicone seal from the glassblower the melting of the filter candle and the ground sleeve to an apparatus on the 6 mm thick glass tube be postponed and therefore inseparable are connected to the glass part.

3. Micro COD apparatus for hydrogen chloride absorption according to claim 1 and 2, characterized in that all glass parts made of quartz glass or Plexiglass or another plastic are.

Sources:
1. DIN 38 409, part 41
2nd catalog from Schott, Mainz
3. Utility model G 81 12 666.2
4. Europatent 8 01 04 421.5
5. Europatent 8 01 06 327.2
6. German patent 31 01 613.8
7. German Patent 31 61 553.0
8. Utility model 81 17 660.0
9. Company catalog Corning