EP1682275A1 - Pipette a echantillons - Google Patents

Pipette a echantillons

Info

Publication number
EP1682275A1
EP1682275A1 EP04789822A EP04789822A EP1682275A1 EP 1682275 A1 EP1682275 A1 EP 1682275A1 EP 04789822 A EP04789822 A EP 04789822A EP 04789822 A EP04789822 A EP 04789822A EP 1682275 A1 EP1682275 A1 EP 1682275A1
Authority
EP
European Patent Office
Prior art keywords
sample
cannula
functional element
hollow needle
sample pipette
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Withdrawn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
EP04789822A
Other languages
German (de)
English (en)
Inventor
Hansjörg Cueni
Heiner Scherrer
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
Publication of EP1682275A1 publication Critical patent/EP1682275A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/0275—Interchangeable or disposable dispensing tips
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/04—Preparation or injection of sample to be analysed
    • G01N30/16—Injection
    • G01N30/18—Injection using a septum or microsyringe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/02—Adapting objects or devices to another
    • B01L2200/026—Fluid interfacing between devices or objects, e.g. connectors, inlet details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0832—Geometry, shape and general structure cylindrical, tube shaped
    • B01L2300/0838—Capillaries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
    • B01L3/022—Capillary pipettes, i.e. having very small bore

Definitions

  • the invention relates to a sample pipette with a hollow needle for drawing up a volume of liquid, for example a sample, a reagent, etc., and for ejecting it into a vessel or into a sample receiving inlet of an analysis device, in particular for sample injection into an HPLC device.
  • Sample preparation is often required between taking a sample and entering it into a chromatography device.
  • the sample is ejected from the removal pipette into a processing vessel and, after processing, drawn up into a sample delivery pipette.
  • a simplification is achieved by an interchangeable cannula fitted with functional elements, for example filters, coatings with active phases, etc., made of an injection needle and an attachment part, which is placed on the hollow needle.
  • functional elements for example filters, coatings with active phases, etc.
  • cannula In medicine and in related areas, the term cannula is usually one-sided for piercing suitable injection needle provided at the other end with a plug-in cone for connection to a syringe etc.
  • the term is used in a similar manner in the present description, with a special attachment part being present instead of the plug-in cone.
  • injection needle is used for that of the cannula.
  • Fig. 1 shows a sample pipette with a replaceable cannula attached.
  • Fig. 2 is a sectional view of the assembled cannula
  • Fig. 3 is a sectional view of the exploded individual parts of the cannula
  • the pipette shows a sample application pipette in the form of a syringe for manual sample application in an HPLC device.
  • the pipette consists essentially of a cylinder 1, at one end 2 of which a hollow needle 4 connected to its interior 3 is arranged, and a piston 5 which is axially movable in the interior and is actuated from the other end 6 of the cylinder.
  • a hollow needle 4 connected to its interior 3
  • piston 5 which is axially movable in the interior and is actuated from the other end 6 of the cylinder.
  • a cannula 7 is arranged on the free end of the hollow needle 4, which is merely plugged on and therefore easily is changeable.
  • the cannula 7 is designed for single use, ie a new cannula is generally used for each new proloe. For certain work steps it may make sense to change the cannula even between drawing up and ejecting a sample, as described below.
  • the cannula 7 shown in the sectional views in FIGS. 2 and 3 consists of an injection needle 8 and an attachment part 9.
  • the attachment part 9 consists of a receiving sleeve 10, an insertion sleeve 11 arranged coaxially therein and a functional element 12 arranged in between.
  • the receiving sleeve 10 is firmly connected on one side to the injection needle 8. From its other side, a weakly conical bore 13 extends to the injection needle 8.
  • the receiving sleeve 10 essentially has the shape of the plug-in cone of the Luer type known from commercially available cannulas.
  • the insertion sleeve 11 has a conical outer wall 14 corresponding to the bore 13 and a continuous axial channel 15.
  • the channel 15 is widened at its end facing the receiving sleeve to a cylindrical chamber 16 which serves to receive the functional element 12.
  • a funnel-shaped extension 17 is formed, by means of which the insertion of the hollow needle 4 is facilitated when the cannula is replaced.
  • the central part 18 of the channel 15 is weakly conical or cylindrical and so narrow that it tightly encloses the hollow needle of the syringe.
  • a constriction 19 is provided in front of the chamber to limit the depth of insertion of the hollow needle.
  • the closed sides of the chamber 16 and the bore 13 are recessed conically. This results in 12 flat, free cavities on both sides of the functional element used.
  • the functional element 12 is a filter, for example. This is used to filter a sample when it is drawn up in order to separate undesired components of the sample. In order to avoid entrainment of the filtered components during the subsequent injection of such a filtered sample into an analysis device, the cannula used for drawing up is expediently removed or replaced by a new cannula with or without a filter.
  • the flat cavities on both sides of the functional element 12 achieve a uniform distribution of the sample over the entire active cross section.
  • the functional element 12 can also be a package with an active phase, on which components of the sample are adsorbed. These components can be redissolved in a subsequent step using a suitable solvent. As with filtering, these steps are possible both when opening and when ejecting.
  • a pipette provided with this cannula can therefore be used very advantageously for sample preparation.
  • Samples which are taken up and ejected treated by one or two different cannulas are dispensed into a vessel, for example a cuvette of a microtiter plate, and further processed there by mixing etc. before they are entered into an analysis device.
  • sample pipette according to the invention is evident in the fact that the liquid volume after being drawn up in the hollow needle is on the other side of the cannula. This makes it possible to exchange the cannula for another cannula before ejecting it.
  • the attachment part can also take forms other than those shown in the present exemplary embodiment.
  • cannulas can also be provided, the attachment part of which has a larger internal volume.
  • a liquid volume can only be drawn into the cannula. This can be expedient, for example, if there is already a sample inside the hollow needle and a mixture is to take place when it is ejected.

Landscapes

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

Abstract

Pipettes à échantillons utilisées en particulier pour l'injection d'échantillons dans des appareils de chromatographie liquide à haute pression, qui sont pourvues d'une aiguille creuse (4) destinée à prélever un échantillon et à expulser ce dernier dans un récipient ou dans le dispositif récepteur d'échantillon de l'appareil. Une canule interchangeable (7) est montée sur l'aiguille creuse d'une pipette de ce type, ladite canule pouvant contenir des éléments fonctionnels supplémentaires (12) tels que des filtres, des phases chimiquement actives, etc.
EP04789822A 2003-10-31 2004-10-29 Pipette a echantillons Withdrawn EP1682275A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH18582003 2003-10-31
PCT/CH2004/000654 WO2005042166A1 (fr) 2003-10-31 2004-10-29 Pipette a echantillons

Publications (1)

Publication Number Publication Date
EP1682275A1 true EP1682275A1 (fr) 2006-07-26

Family

ID=34529363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04789822A Withdrawn EP1682275A1 (fr) 2003-10-31 2004-10-29 Pipette a echantillons

Country Status (3)

Country Link
US (1) US7434483B2 (fr)
EP (1) EP1682275A1 (fr)
WO (1) WO2005042166A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005057206A1 (fr) * 2003-12-09 2005-06-23 Bgb Analytik Ag Dispositif pour preparer un echantillon
US7798021B2 (en) 2006-01-12 2010-09-21 Gamble Kimberly R Method and apparatus for sample processing and injection
US8291778B2 (en) * 2006-09-08 2012-10-23 Ronald Rockwell Rich Extractive sampling system for fluids
CN101792105B (zh) * 2009-02-04 2012-09-26 刘伟耀 定量取液器
US9891149B2 (en) 2011-08-08 2018-02-13 Thermo Fisher Scientific Oy Method and apparatus for automated analysis
FI20115785A0 (fi) * 2011-08-08 2011-08-08 Thermo Fisher Scientific Oy Menetelmä ja laite automaattiseen analyysiin
DE102012015063B4 (de) * 2012-07-31 2014-10-30 Sartorius Stedim Biotech Gmbh Vorrichtung und Verfahren zur Behandlung eines Filtrationsmediums
CN112206844A (zh) * 2020-08-17 2021-01-12 武汉迈特维尔生物科技有限公司 一种过滤小体积生物样品溶液的装置及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001929A (en) * 1975-07-30 1977-01-11 Soji Ishikawa Method of constructing a medical needle holder assembly
US4316462A (en) 1980-05-21 1982-02-23 Siloam, Inc. Filtering device for an injection device
JPS5861251U (ja) 1981-10-22 1983-04-25 石川　惣二 注射針
EP0201611A1 (fr) * 1985-05-10 1986-11-20 B. Braun-SSC AG Seringue à deux canules
EP1382963B1 (fr) * 2001-04-20 2008-09-03 Gl Sciences Incorporated Procede et instrument d'extraction d'un composant a l'etat de trace en phase solide
US20030087454A1 (en) 2001-10-26 2003-05-08 Schultz Gary A Method and device for chemical analysis

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005042166A1 *

Also Published As

Publication number Publication date
US7434483B2 (en) 2008-10-14
US20070056350A1 (en) 2007-03-15
WO2005042166A1 (fr) 2005-05-12

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