CH689628A5 - Apparatus for sample concentration - Google Patents

Apparatus for sample concentration Download PDF

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Publication number
CH689628A5
CH689628A5 CH225395A CH225395A CH689628A5 CH 689628 A5 CH689628 A5 CH 689628A5 CH 225395 A CH225395 A CH 225395A CH 225395 A CH225395 A CH 225395A CH 689628 A5 CH689628 A5 CH 689628A5
Authority
CH
Switzerland
Prior art keywords
needles
chamber
pressure chamber
gas
rings
Prior art date
Application number
CH225395A
Other languages
German (de)
Inventor
Rolf Hofer
Original Assignee
Rolf Hofer
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 Rolf Hofer filed Critical Rolf Hofer
Priority to CH225395A priority Critical patent/CH689628A5/en
Publication of CH689628A5 publication Critical patent/CH689628A5/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40Concentrating samples
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02Column chromatography
    • G01N30/04Preparation or injection of sample to be analysed
    • G01N30/06Preparation
    • G01N30/12Preparation by evaporation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02Column chromatography
    • G01N30/04Preparation or injection of sample to be analysed
    • G01N30/06Preparation
    • G01N30/12Preparation by evaporation
    • G01N2030/126Preparation by evaporation evaporating sample

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The laboratory apparatus for the concentration of samples for analysis, using an inert gas such as nitrogen or argon, has a gas pressure chamber (1) of a transparent material, mounted to a stand which allows the chamber to be swung up and down. The position of the chamber is set by two setting rings and stand cubes with two sliding and parallel rods. Hollow needles (5) pass through the chamber, to blow inert gas into accurately positioned sample containers under them, and concentrate the samples. The needles are closed by upper plastics pins (6), and have a side opening (7) cut into the needle wall. The needles (5) are sealed at the chamber walls by O-rings (8) and end nipples (9). The gas flow is interrupted by lifting the needles (5) to shroud their side openings (7). The gas feed into the chamber (1) is controlled by a throttle valve (10).

Description

       

  
 



  Bei der Vorrichtung handelt es sich um ein Laborgerät, welches zum Einengen von Proben (beispielsweise Extrakte) unter Verwendung von Inertgas dient. 



  Die Vorrichtung findet Anwendung im Laborbereich zur Probenvorbereitung zwecks nachfolgenden Untersuchungen mittels Analysenmethoden wie DC, GC, HPLC etc. 



  Die Vorrichtung besteht grundsätzlich aus einer Gasdruckkammer (1) (Patentanspruch 1) aus Plexiglas oder einem anderen geläufigen, transparenten Werkstoff, welche an einem speziellen Stativ befestigt ist, das es erlaubt, die Druckkammer hoch und runter zu klappen (Patentanspruch 1). Nach dem Hochklappen bleibt das Gerät in dieser Position (Fig. 2a) und nach dem Runterklappen ist es wieder in allen drei Dimensionen genau positioniert (Patentanspruch 1, Fig. 2b): Die seitliche Verschiebung wird durch zwei Stellringe (2) verhindert (Patentanspruch 2), die Höhe wird durch zwei Stativwürfel (3) (Patentanspruch 3) mit zwei verschoben, parallel geführten Stäben (4) festgelegt (Patentanspruch 1) und die Tiefe ist durch die Befestigung der Druckkammer an einem der beiden Stäbe gegeben (Patentanspruch 3).

   Durch die oben beschriebene Druckkammer führen Hohlnadeln (5), welche einzeln senkrecht verschoben werden können (Patentanspruch 1). Sie dienen dazu, in die genau darunter positionierten Probengefässe Inertgas (vorwiegend Stickstoff oder Argon) zu blasen und die Proben dadurch einzuengen (d.h. das Lösungsmittel abzudampfen). Die Nadeln sind oben mit einem Kunststoffzäpfchen (6) verschlossen und weisen seitlich ein eingeschliffenes Loch (7) auf (Patentanspruch 5). Sie sind jeweils oben und unten, bei der Durchführung durch die Druckkammer, mit O-Ringen (8) und Endnippeln (9) aus PTFE abgedichtet (Patentanspruch 4). Es strömt nur Gas aus den Nadeln, sofern diese heruntergedrückt (Fig. 3c) sind.

   Werden sie hochgezogen (Fig. 3d), ist der Gasfluss durch die entsprechenden Nadeln hindurch unterbrochen, wobei sich diese Nadeln somit automatisch ausserhalb des Kontaminationsbereiches befinden. Die Vorrichtung ist mit einem Drosselventil (10) versehen, über welches der Gasfluss eingestellt werden kann. Die Druckkammer arbeitet mit einem minimalen Überdruck. 



  Die Vorteile gegenüber dem Stand der Technik liegen darin, dass die Nadeln nicht benutzter Positionen heraufgezogen (Patentanspruch 1) und somit aus dem Kontaminationsbereich entfernt sind, was zusätzlich auf einen Blick ersichtlich macht, welche Positionen mit Inertgas bedient und welche nicht bedient sind sowie die automatische Positionierung der Vorrichtung in allen drei Dimensionen nach jeder Manipulation (Patentanspruch 1), was die Arbeit stark vereinfacht und die Arbeitszeit verkürzt. Insbesondere ist bei nach oben geklappter Druckkammer, der Zugang zum Gerät für das Austauschen von Proben absolut frei, was bei den herkömmlichen Geräten nicht der Fall ist.

   Auch werden bei herkömmlichen Geräten nicht verwendete Positionen durch Zudrehen von Ventilen oder sogar durch Herausdrehen der entsprechenden Nadeln und anschliessendem Aufsetzen von Verschlusskappen ausgeschaltet, was eine kompliziertere Handhabung bedeutet. Insbesondere gestaltet sich das neu Positionieren nach einer Manipulation bei herkömmlichen Geräten komplizierter, da meistens beide Hände dazu gebraucht werden. Bei der Erfindung hingegen sind alle Manipulationen mühelos mit einer Hand durchführbar. Ein weiterer Vorteil gegenüber dem Stand der Technik ist die Transparenz der Gasdruckkammer, wodurch eine zusätzliche Sicherheit entsteht, dass keine Verunreinigungen wie beispielsweise Kondenswasser ungeachtet in die Proben gelangen. 



  
 



  The device is a laboratory device which is used to concentrate samples (for example extracts) using inert gas.



  The device is used in the laboratory for sample preparation for subsequent examinations using analysis methods such as DC, GC, HPLC etc.



  The device basically consists of a gas pressure chamber (1) (claim 1) made of plexiglass or another common, transparent material, which is attached to a special tripod that allows the pressure chamber to be folded up and down (claim 1). After folding up, the device remains in this position (Fig. 2a) and after folding down, it is exactly positioned again in all three dimensions (claim 1, Fig. 2b): The lateral displacement is prevented by two adjusting rings (2) (claim 2 ), the height is determined by two tripod cubes (3) (claim 3) with two parallel rods (4) guided in parallel (claim 1) and the depth is given by attaching the pressure chamber to one of the two rods (claim 3).

   Hollow needles (5) lead through the pressure chamber described above and can be individually displaced vertically (claim 1). They are used to blow inert gas (predominantly nitrogen or argon) into the sample vessels positioned underneath and thereby to concentrate the samples (i.e. to evaporate the solvent). The needles are closed at the top with a plastic suppository (6) and have a cut-in hole (7) on the side (claim 5). They are sealed at the top and bottom, when passing through the pressure chamber, with O-rings (8) and end nipples (9) made of PTFE (claim 4). Only gas flows out of the needles if they are pressed down (Fig. 3c).

   If they are pulled up (Fig. 3d), the gas flow through the corresponding needles is interrupted, whereby these needles are thus automatically outside the contamination area. The device is provided with a throttle valve (10), via which the gas flow can be adjusted. The pressure chamber works with a minimal overpressure.



  The advantages compared to the prior art are that the needles are pulled up from unused positions (claim 1) and are thus removed from the contamination area, which also makes it clear at a glance which positions are operated with inert gas and which are not operated as well as the automatic one Positioning of the device in all three dimensions after each manipulation (claim 1), which greatly simplifies the work and shortens the working time. In particular, with the pressure chamber folded up, access to the device for exchanging samples is absolutely free, which is not the case with conventional devices.

   Positions that are not used in conventional devices are also switched off by closing valves or even by unscrewing the corresponding needles and then fitting closure caps, which means more complicated handling. In particular, repositioning after manipulation with conventional devices is more complicated, since both hands are usually used for this. With the invention, however, all manipulations can be carried out effortlessly with one hand. Another advantage over the prior art is the transparency of the gas pressure chamber, which creates an additional security that no contaminants such as condensed water will get into the samples regardless.


    

Claims (5)

Abdampfvorrichtung zum Einengen von Proben, eine Gasdruckkammer (1) an einem Stativ mit zwei parallelen Stäben aufweisend, welches erlaubt, die Gasdruckkammer hoch (Fig. 2) und runter (Fig. 1) zu klappen, und welches Mittel aufweist, um die Druckkammer in der Höhe und seitlich einzustellen, dadurch gekennzeichnet dass die Nadeln (5) bei Nichtverwendung anhebbar sind und dadurch kein Gas durchlassen (Fig. 3d) und dass die seitliche und die Höhenverstellung durch zwei verschoben parallel geführte Stäbe (4), welche die hoch- bzw. heruntergeklappte Position festlegen, eine automatische millimetergenaue Positionierung nach jeder Manipulation gewährleistet.        Evaporating device for concentrating samples, comprising a gas pressure chamber (1) on a stand with two parallel rods, which allows the gas pressure chamber to be folded up (FIG. 2) and down (FIG. 1), and which has means for the pressure chamber in the height and to the side, characterized in that the needles (5) can be raised when not in use and thus do not let gas pass (Fig. 3d) and that the lateral and height adjustment are carried out by two parallel rods (4) which move the up or down Determine the folded down position, automatic millimeter-precise positioning after each manipulation is guaranteed. 2. Die Abdampf-Vorrichtung nach Anspruch 1 ist dadurch gekennzeichnet, dass das seitliche Verschieben der Druckkammer (1) durch zwei Stellringe (2) verhindert wird. 2. The evaporation device according to claim 1 is characterized in that the lateral displacement of the pressure chamber (1) is prevented by two adjusting rings (2). 3. 3rd Die Abdampf-Vorrichtung nach Anspruch 1 ist dadurch gekennzeichnet, dass die Positionierung (Fig. 2a und b) der Druckkammer (1) durch deren Befestigung an einer der beiden verschoben parallel geführten Stäbe sowie durch zwei Stellwürfel (3) mit den beiden verschoben, parallel geführten Stäben (4) erzielt wird.  The evaporation device according to claim 1 is characterized in that the positioning (Fig. 2a and b) of the pressure chamber (1) by their attachment to one of the two displaced parallel rods and by two adjusting cubes (3) with the two displaced, parallel guided rods (4) is achieved. 4. Die Abdampf-Vorrichtung nach Anspruch 1 ist dadurch gekennzeichnet, dass die Nadeln (5) mittels O-Ringen (8) und Endnippeln (9) abgedichtet sind. 4. The evaporation device according to claim 1 is characterized in that the needles (5) are sealed by means of O-rings (8) and end nipples (9). 5. Die Abdampf-Vorrichtung nach Anspruch 1 ist dadurch gekennzeichnet, dass die Nadeln (5) eine seitlich angebrachte Bohrung (7) aufweisen. 5. The evaporation device according to claim 1 is characterized in that the needles (5) have a laterally mounted bore (7).  
CH225395A 1995-08-04 1995-08-04 Apparatus for sample concentration CH689628A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH225395A CH689628A5 (en) 1995-08-04 1995-08-04 Apparatus for sample concentration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH225395A CH689628A5 (en) 1995-08-04 1995-08-04 Apparatus for sample concentration

Publications (1)

Publication Number Publication Date
CH689628A5 true CH689628A5 (en) 1999-07-15

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Application Number Title Priority Date Filing Date
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CH (1) CH689628A5 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103487314A (en) * 2013-09-30 2014-01-01 南京白云化工环境监测有限公司 Nitrogen blowing instrument with variable gas supply rate
WO2015074181A1 (en) * 2013-11-19 2015-05-28 成都市产品质量监督检验院 Nitrogen blowing apparatus and wet dissolving method using nitrogen blowing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103487314A (en) * 2013-09-30 2014-01-01 南京白云化工环境监测有限公司 Nitrogen blowing instrument with variable gas supply rate
WO2015074181A1 (en) * 2013-11-19 2015-05-28 成都市产品质量监督检验院 Nitrogen blowing apparatus and wet dissolving method using nitrogen blowing apparatus

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