DE4338972A1 - Flow-through measuring cell - Google Patents

Flow-through measuring cell

Info

Publication number
DE4338972A1
DE4338972A1 DE19934338972 DE4338972A DE4338972A1 DE 4338972 A1 DE4338972 A1 DE 4338972A1 DE 19934338972 DE19934338972 DE 19934338972 DE 4338972 A DE4338972 A DE 4338972A DE 4338972 A1 DE4338972 A1 DE 4338972A1
Authority
DE
Germany
Prior art keywords
cell
flow
measuring cell
volume
measuring
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Withdrawn
Application number
DE19934338972
Other languages
German (de)
Inventor
Edgar Grom
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19934338972 priority Critical patent/DE4338972A1/en
Publication of DE4338972A1 publication Critical patent/DE4338972A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/30—Sample handling arrangements, e.g. sample cells, spinning mechanisms
    • G01R33/307—Sample handling arrangements, e.g. sample cells, spinning mechanisms specially adapted for moving the sample relative to the MR system, e.g. spinning mechanisms, flow cells or means for positioning the sample inside a spectrometer
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N21/05—Flow-through cuvettes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N2021/0346—Capillary cells; Microcells

Abstract

A flow-through measuring cell, as shown in the fig., is new and is used in NMR, HPLC and CZE. The cell pref. consists of glass, fused silica or plastic and comprises an inlet, a cell and an outlet as a one-piece component.

Description

Es wird die Konstruktion einer Durchfluß-Meßzelle beschrieben. Die Einsatzgebiete sind NMR, HPLC und CZE.The construction of a flow measuring cell is described. The fields of application are NMR, HPLC and CZE.

Um ein genügend großes Meßsignal zu erhalten, muß das zu messende Medium ein bestimmtes Volumen haben. Da in der Regel die Zuführungen zum Meßpunkt einen sehr kleinen Durchmesser haben, muß an dieser Stelle eine Volumenvergrößerung erfolgen. Normalerweise geschieht dies durch Schrauben, Flanschen, Löten, Klemmen usw.In order to obtain a sufficiently large measurement signal, this must be done measuring medium have a certain volume. Because usually the leads to the measuring point have a very small diameter volume must be increased at this point. Usually this is done by screwing, flanging, soldering, Clamps etc.

Der Nachteil dieser Verfahren ist:The disadvantage of this method is:

Totvolumina und ungünstige Strömungsverhältnisse.Dead volumes and unfavorable flow conditions.

Die verwendeten Zell-Materialien sind Glas, Fused-Silica und Kunststoff. Die Lösung des Problems wird dadurch ereicht, daß Zuleitung, Ableitung und Volumenvergrößerung der Zelle eine Einheit bilden. Die Stelle der Volumenvergrößerung wird, wie in Abb. 1 gezeigt, aufgeweitet. Da es sich um Glas oder Kunst­ stoff handelt, ist dies sehr einfach.The cell materials used are glass, fused silica and plastic. The solution to the problem is achieved in that the supply, discharge and volume increase of the cell form a unit. The location of the volume increase is widened as shown in Fig. 1. Since it is glass or plastic, this is very easy.

Der Patentanmelder hat bereits 1982 die ersten Konstruktionen (und weitere) in der Literatur beschrieben, sich jedoch erst jetzt zur Patentanmeldung entschlossen. The patent applicant had the first designs back in 1982 (and others) described in the literature, but not yet now decided to register a patent.  

AusführungsbeispieleEmbodiments

Abb. 1 zeigt die Durchfluß-Meßzelle mit der Volumenvergrößerung am jeweiligen Meßpunkt, sowie die Zu- und Ableitungen. Das Zell- Material ist Glas, Fused-Silica oder Kunststoff. Die Volumenver­ größerung kann bedingt durch den Herstellungsprozeß zylindrisch, rund oder jede beliebige Form haben. Fig. 1 shows the flow measuring cell with the volume increase at the respective measuring point, as well as the supply and discharge lines. The cell material is glass, fused silica or plastic. The increase in volume can be cylindrical, round or any shape due to the manufacturing process.

Die Einsatzgebiete sind:The areas of application are:

NMR mit Durchfluß-Meßzelle, hier wird die Volumenvergrößerung mit der Meßspule umwickelt. Bei der HPLC oder CZE wird die Volumenvergrößerung der Zelle in den Strahlengang des Detektors eingebaut.NMR with flow measuring cell, here is the volume increase wrapped with the measuring coil. In HPLC or CZE, the Volume increase of the cell in the beam path of the detector built-in.

Claims (6)

1. Durchfluß-Meßzelle wie in Abb. 1 gezeigt. Als Meßzelle für NMR, HPLC und CZE.1. Flow measuring cell as shown in Fig. 1. As a measuring cell for NMR, HPLC and CZE. 2. Durchflußzelle aus Glas, Fused-Silica oder Kunststoff.2. Flow cell made of glass, fused silica or plastic. 3. Die Volumenvergrößerung kann zylindrisch, rund oder jede beliebige Form haben.3. The volume increase can be cylindrical, round or any have any shape. 4. Die Innendurchmesser der Zu-oder Ableitungen liegen im Bereich von 10 cm bis 0,001 mm. Die Länge von 1 mm bis 500 cm.4. The inside diameter of the feed or discharge lines lies in the Range from 10 cm to 0.001 mm. The length from 1 mm to 500 cm. 5. Das Verhältnis:Durchmesser Volumenvergrößerung/ Durchmesser Zu- oder Ableitung von 1 bis 100 000.5. The ratio: diameter volume increase / Diameter inlet or outlet from 1 to 100,000. Die Durchfluß-Meßzelle ist dadurch gekennzeichnet, daß Zuführung, Zelle und Abführung aus einem Teil bestehen. Damit wird das Meßvolumen vergrößert,Totvolumen und Strömungsprobleme gelöst.The flow measuring cell is characterized in that Feed, cell and discharge consist of one part. This increases the measuring volume, dead volume and Flow problems solved.
DE19934338972 1993-11-15 1993-11-15 Flow-through measuring cell Withdrawn DE4338972A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19934338972 DE4338972A1 (en) 1993-11-15 1993-11-15 Flow-through measuring cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19934338972 DE4338972A1 (en) 1993-11-15 1993-11-15 Flow-through measuring cell

Publications (1)

Publication Number Publication Date
DE4338972A1 true DE4338972A1 (en) 1995-05-18

Family

ID=6502636

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19934338972 Withdrawn DE4338972A1 (en) 1993-11-15 1993-11-15 Flow-through measuring cell

Country Status (1)

Country Link
DE (1) DE4338972A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997038325A1 (en) * 1996-04-04 1997-10-16 Varian Associates, Inc. Flow tube for nmr probe
FR2847674A1 (en) * 2002-11-26 2004-05-28 Univ Droit D Economie Et Des S Analysis of a sample placed in a support which allows diffusion of the constituents by nuclear magnetic resonance spectroscopy
WO2005024399A2 (en) * 2003-04-21 2005-03-17 The Board Of Trustees Of The Leland Stanford Junior University Brewster's angle flow cell for cavity ring-down spectroscopy

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997038325A1 (en) * 1996-04-04 1997-10-16 Varian Associates, Inc. Flow tube for nmr probe
US5867026A (en) * 1996-04-04 1999-02-02 Varian Associates, Inc. Flow tube for NMR probe
EP1574871A2 (en) * 1996-04-04 2005-09-14 Varian, Inc. Flow tube for NMR probe
EP1574871A3 (en) * 1996-04-04 2005-12-28 Varian, Inc. Flow tube for NMR probe
FR2847674A1 (en) * 2002-11-26 2004-05-28 Univ Droit D Economie Et Des S Analysis of a sample placed in a support which allows diffusion of the constituents by nuclear magnetic resonance spectroscopy
WO2005024399A2 (en) * 2003-04-21 2005-03-17 The Board Of Trustees Of The Leland Stanford Junior University Brewster's angle flow cell for cavity ring-down spectroscopy
WO2005024399A3 (en) * 2003-04-21 2005-05-12 Univ Leland Stanford Junior Brewster's angle flow cell for cavity ring-down spectroscopy
US7064836B2 (en) 2003-04-21 2006-06-20 The Board Of Trustees Of The Leland Stanford Junior University Brewster's angle flow cell for cavity ring-down spectroscopy

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Legal Events

Date Code Title Description
ON Later submitted papers
8139 Disposal/non-payment of the annual fee