US3713777A - Liquid analyzing device - Google Patents

Liquid analyzing device Download PDF

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Publication number
US3713777A
US3713777A US00153573A US3713777DA US3713777A US 3713777 A US3713777 A US 3713777A US 00153573 A US00153573 A US 00153573A US 3713777D A US3713777D A US 3713777DA US 3713777 A US3713777 A US 3713777A
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US
United States
Prior art keywords
tube
auxiliary
needle
working
liquid
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 - Lifetime
Application number
US00153573A
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English (en)
Inventor
M Auphan
J Perilhou
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US Philips Corp
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US Philips Corp
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Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N35/1095—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers
    • G01N35/1097—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers characterised by the valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N35/1079—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices with means for piercing stoppers or septums

Definitions

  • the invention relates to a device for analyzing a plurality of liquid samples, each contained in a tube having an elastic wall, termed working tube, said device comprising at least one working space located between a stationary wall and a row of pressing feet adapted to be moved towarls the stationary wall and located opposite the stationary wall, said working space being adapted to accommodate each time on Working tube extending parallel to the row of pressing feet, the device comprising furthermore auxiliary tubes containing auxiliary liquids and also having an elastic wall, said auxiliary tubes being movable and being adapted to be moved one by one up to a small distance from the working tube contained in the working space, whilst for establishing a communication between the working tube in the working space and the near auxiliary tube a hollow needle having an orifice near its tip is provided.
  • Such a device is known from French Pat. of Addition No. 93,162.
  • the working tubes are arranged parallel to each other on a conveyor belt.
  • the auxiliary tubes are fastened also parallel to each other in cavities in a thick conveyor belt.
  • Each auxiliary tube can be slipped out of its cavity until it is near a wonking tube.
  • a hollow needle fastened to the auxiliary tube pierces the wall of the working tube, after which by means of pressing feet, which locally pinch the auxiliary tube auxiliary liquid is transferred through the needle.
  • each auxiliary tube has to be provided with a hollow needle, so that the auxiliary tubes are expensive and have to be handled carefully.
  • the invention has for its object to provide a simple structure which is free of said disadvantages.
  • the device embodying the invention is characterized in that the needle 3 is axially displaceable through two opposite points of the wall of the auxiliary tube 2 and through the wall of the working tube 1, the needle having a lateral orifice 4 at a distance from the tip which is substantially equal to the distance between the axes of the tubes measured in the direction of the needle 3-.
  • the device according to the invention is preferably constructed so that inside the hollow needle a pin is provided, the length of which is at least equal to the length of the needle, whereas its diameter is substantially equal to the inner diameter of the needle, said pin being axially movable relative to the needle.
  • FIGS. 1 and 2 show a working tube with pressing feet during the preparations required for transferring an auxiliary liquid to the working tube.
  • FIGS. 3 to 10 show the working tube of FIGS. 1 and 2 and an auxiliary tube communicating therewith during consecutive stages of the transfer of auxiliary liquid.
  • a working tube 1 is accommodated in the working space between a stationary wall 8 and a row of pressing feet P P P P adapted to be moved towards the stationary wall 8.
  • the number of feet may, of course, be different from five in accordance with the analysis to be carried out.
  • Each pressing foot has a free position and a Working position.
  • the free position see, for example, P in FIG. 2 the pressing foot does not engage the .working tube 1.
  • the working position see, for example, P in FIG. 2 the working tube is flattened between the pressing foot and the stationary wall 8 so that at the place of the pressing foot, the working tube is shut.
  • an auxiliary tube 2 is arranged (see FIGS. 3 to 10), which can communicate through a hollow needle 3 with the Working tube.
  • the needle 3 Apart from an orifice (not shown) near the tip the needle 3 has a lateral orifice 4, whose distance from the needle tip is substantially equal to the distance between the center lines of the working tube 1 and the auxiliary tube 2.
  • the needle 3 is arranged in the holder 5, which can be moved (by means not shown) in the direction of length of the needle.
  • a pin 6 is provided, the diameter of which is substantially equal to the inner diameter of the needle.
  • the length of the pin 6 is at least equal to the length of the needle 3 so that the pin can fill out the whole internal space of the needle (see, for example, FIG. 3).
  • the pin 6 then closes the orifice 4 and that near the needle tip, whilst it stiifens the needle in piercing the walls of the auxiliary tube 2 and the working tube 1.
  • the pin 6 is axially movable relative to the needle 3 and the holder 5 and can be pulled out of the needle at least to an extent such that the orifice 4 is free.
  • the needle 3 is then pierced through the auxiliary tube 2 and it penetrates into the working tube 1 at the place of the cavity 7 (see FIG. 3).
  • the pin 6 is withdrawn so that the lateral orifice 4 is set free (FIG. 4).
  • the pressing feet P and P are moved into the free positions (FIG. 5) so that the cavity 7 is enlarged. In the same manner as described above this larger cavity is also filled with liquid.
  • the pin 6 is inserted back into the needle 3 (FIG. 6) so that the orifice 4 is closed, after which the pressing foot P is moved into the free position (FIG. 7), so that the auxiliary liquid in the working tube is subjected to atmospheric pressure.
  • a given dose of the auxiliary liquid contained in the working tube as required for the analysis has to be separated.
  • the pressing foot P is moved into the working position, after which an accurately defined quantity of auxiliary liquid is located above P (FIG. 8).
  • the excess quantity of auxiliary liquid available beneath the pressing foot P is removed as follows: first the pin 6 is withdrawn so that the orifice 4 is released (FIG. 9), after which the pressing foot P is moved into the working position, while the needle 3 is gradually withdrawn so that the auxiliary liquid flows back into the auxiliary tube 2. This finally results in the final position shown in FIG. 10.
  • the liquids in the Working tube can then be mixed in known manner, after which the analysis proper can start.
  • auxiliary substances can be dosed with very great accuracy: with a dose of 3 for example, the deviation may be about 1%.
  • a device as claimed in claim 1 further comprising a pin provided inside the hollow needle, the length of said pin being at least equal to the length of the needle, whereas its diameter is substantially equal to the inner diameter of the needle, said pin being axially movable relative to the needle.

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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)
US00153573A 1970-07-01 1971-06-16 Liquid analyzing device Expired - Lifetime US3713777A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7024422A FR2097303A6 (enExample) 1970-07-01 1970-07-01

Publications (1)

Publication Number Publication Date
US3713777A true US3713777A (en) 1973-01-30

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ID=9058127

Family Applications (1)

Application Number Title Priority Date Filing Date
US00153573A Expired - Lifetime US3713777A (en) 1970-07-01 1971-06-16 Liquid analyzing device

Country Status (8)

Country Link
US (1) US3713777A (enExample)
BE (1) BE769248R (enExample)
CA (1) CA946647A (enExample)
DE (1) DE2128018A1 (enExample)
FR (1) FR2097303A6 (enExample)
GB (1) GB1299829A (enExample)
IT (1) IT988025B (enExample)
NL (1) NL7108870A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038874A (en) * 1975-04-24 1977-08-02 Societe Nationale Elf Aquitaine (Production) Device for the insertion of samples into a chromatography column

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3917840A1 (de) * 1989-06-01 1990-12-06 Bodenseewerk Perkin Elmer Co Anordnung zur anreicherung von probensubstanz fuer spektroskopische zwecke bei der fliessinjektions-analyse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038874A (en) * 1975-04-24 1977-08-02 Societe Nationale Elf Aquitaine (Production) Device for the insertion of samples into a chromatography column

Also Published As

Publication number Publication date
DE2128018A1 (de) 1972-03-16
GB1299829A (en) 1972-12-13
CA946647A (en) 1974-05-07
NL7108870A (enExample) 1972-01-04
BE769248R (nl) 1971-12-29
FR2097303A6 (enExample) 1972-03-03
IT988025B (it) 1975-04-10

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