Method and apparatus for transfusing liquid specimen for optical characteristic measurement and polarimeter using the same

• US 6,046,805 A
• Filed: 09/23/1998
• Issued: 04/04/2000
• Est. Priority Date: 09/24/1997
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Kawamura, Tatsurou, Miyazaki, Jinsei
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): Punnoose, Roy M.
• Application Number:
  US09/159,502
• Time in Patent Office: 559 Days
• Field of Search: 356/364, 356/367, 356/368, 356/244, 356/246, 356/432, 356/440, 356/441, 356/442
• US Class Current: 356/244
• CPC Class Codes: G01N 1/14 Suction devices, e.g. pumps; Ejector devices
• CPC Class Codes: G01N 2021/054 Bubble trap; Debubbling
• CPC Class Codes: G01N 2021/115 Washing; Purging
• CPC Class Codes: G01N 2021/218 Measuring properties of electrooptical or magnetooptical media
• CPC Class Codes: G01N 21/11 Filling or emptying of cuvettes
• CPC Class Codes: G01N 21/21 Polarisation-affecting properties G01N21/19 takes precedence

Abstract

An apparatus and a method for transfusing liquid specimen for an optical characteristic measurement, which is excellent in operability and handling, and capable of introducing a liquid specimen into a sample cell without detaching the cell from an optical characteristic measurement apparatus and without bubbling, as well as a polarimeter are disclosed. According to the present invention, the specimen can be introduced into the sample cell without detaching the sample cell from the equipment, in a way of connecting the bottom of the sample cell with a reservoir for temporarily accommodating the liquid specimen through a tubular path, then varying a difference in the levels of the sample cell and the reservoir, or a way of using a syringe arranged in the tubular path. At expelling the specimen from the sample cell, the specimen is transfused into the reservoir in a similar manner.

Claims

1. A method for transfusing a liquid specimen for an optical characteristic measurement including the steps of:

preparing an optical characteristic measurement apparatus comprising,

a reservoir for temporarily accommodating a liquid specimen to be measured,

a sample cell for holding said specimen and for permitting a projected light to transmit through the held specimen, and

a tubular path for connecting between said sample cell at the portion being in contact with the held specimen and said reservoir;

supplying the specimen accommodated in the reservoir into said reservoir;

allowing the reservoir to stand for a certain time; and

introducing the specimen accommodated in said reservoir into said sample cell through said tubular path.

2. The method for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 1, further comprising the steps of:

transfusing the specimen introduced in said sample cell, into said reservoir through said tubular path, and removing the specimen transfused into said reservoir therefrom.

3. The method for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 1, further comprising the steps of:

supplying a cleaning solution into said reservoir, after removing said specimen from said reservoir;

introducing the cleaning solution accommodated in the reservoir into said sample cell through said tubular path;

transfusing the cleaning solution introduced in said sample cell into said reservoir through said tubular path; and

removing the cleaning solution transfused into said reservoir therefrom.

4. The method for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 1, wherein another liquid specimen to be measured or a cleaning solution is further supplied to said sample cell, in a state where the previously introduced specimen remains in said sample cell, thereby to expel the specimen remaining in said sample cell and replace the remaining specimen by said another liquid specimen or said cleaning solution.

5. The method for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 1, wherein said specimen or a cleaning solution is transfused between said reservoir and said sample cell by moving said reservoir or said sample cell upwards and downwards.

6. The method for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 1, wherein said specimen is transfused between said reservoir and said sample cell, by sucking said specimen in said reservoir or in said sample cell up using a syringe arranged on a route of said tubular path then releasing the sucked-up specimen to the other side.

7. The method for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 6, wherein said syringe is so arranged that a plunger thereof is directed upward.

8. A method for transfusing a liquid specimen for an optical characteristic measurement including the steps of:

preparing an optical characteristic measurement apparatus comprising,

a reservoir for temporarily accommodating a liquid specimen to be measured,

a sample cell for holding said specimen and for permitting a projected light to transmit through the held specimen, and

a tubular path for connecting between said sample cell at the portion being immersed in the holding specimen and said reservoir;

injecting the specimen or a cleaning solution into said reservoir; and

introducing said specimen or said cleaning solution accommodated in said reservoir into said sample cell through said tubular path by sucking up through an opening arranged at the top end of said sample cell.

9. The method for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 8, wherein the specimen introduced in said sample cell is expelled by sucking it up from said opening.

10. The method for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 8, wherein another liquid specimen to be measured or a cleaning solution is further supplied to said sample cell, in a state where the previously introduced specimen remains in said sample cell, thereby to expel the specimen remaining in said sample cell and replace the remaining specimen with said another liquid specimen or said cleaning solution.

11. An apparatus for transfusing a liquid specimen for an optical characteristic measurement comprising;

a reservoir for temporarily accommodating a liquid specimen to be measured;

a sample cell for holding said specimen and for permitting a projected light to transmit through the held specimen;

a tubular path for connecting the bottom of said sample cell with said reservoir at a portion to be immersed in said accommodated specimen; and

an elevator for moving at least one of said reservoir and said sample cell upward and downwards.

16. A polarimeter utilizing the apparatus for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 11, further comprising:

a monochrome light source for projecting a substantial parallel light;

a polarizer for transmitting only a polarized component in a specified direction of said substantial parallel light;

a coil for applying a magnetic field in the direction of an optical path of said substantial parallel light transmitting through said specimen in said sample cell;

a current source for supplying a current to said coil;

a magnetic field sweeping means for sweeping the current to be flown through said coil;

a magnetic field modulating means for modulating the current to be flown through said coil;

an analyzer for transmitting only a polarized component in another specified direction of said light transmitted through said specimen;

a photosensor for detecting the light transmitted through said analyzer;

a lock-in amplifier for conducting a phase sensitive detection on an output signal of said photosensor with reference to a vibration modulation signal from said magnetic field modulating means; and

a processing unit for calculating an optical activity of said specimen based on a magnetic field sweeping signal of said magnetic field sweeping means and the output signal from said lock-in amplifier.

17. The polarimeter in accordance with claim 16, wherein said specimen is urine.

12. An apparatus for transfusing a liquid specimen for an optical characteristic measurement comprising;

a three-way cock whose one channel is connected to a sample cell for holding a liquid specimen to be measured, and a syringe and a reservoir for accommodating the specimen, each connected to one of the other two channels of said three-way cock, respectively.

13. The apparatus for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 12, wherein said syringe is so arranged that a plunger thereof is placed upper side.

18. A polarimeter utilizing the apparatus for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 12, further comprising:

a monochrome light source for projecting a substantial parallel light;

a polarizer for transmitting only a polarized component in a specified direction of said substantial parallel light;

a sample cell for holding the specimen, which allows said substantial parallel light transmitted through said polarizer to transmit therethrough;

a coil for applying a magnetic field in the direction of an optical path of said substantial parallel light transmitting through said specimen in said sample cell;

a current source for supplying a current to said coil;

a magnetic field sweeping means for sweeping the current to be flown through said coil;

a magnetic field modulating means for modulating the current to be flown through said coil;

an analyzer for transmitting only a polarized component in another specified direction of said light transmitted through said specimen;

a photosensor for detecting the light transmitted through said analyzer;

a lock-in amplifier for conducting a phase sensitive detection on an output signal of said photosensor with reference to a vibration modulation signal from said magnetic field modulating means; and

processing unit for calculating an optical activity of said specimen based on a magnetic field sweeping signal of said magnetic field sweeping means and the output signal from said lock-in amplifier.

19. The polarimeter in accordance with claim 18, wherein said specimen is urine.

14. An apparatus for transfusing a liquid specimen for an optical characteristic measurement comprising a syringe for expelling a liquid specimen held in a sample cell.

15. The apparatus for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 14, wherein said syringe is connected to said sample cell through a three-way cock.

20. A polarimeter utilizing the apparatus for transfusing a liquid specimen for an optical characteristic measurement in accordance with claim 14, further comprising:

a monochrome light source for projecting a substantial parallel light;

a polarizer for transmitting only a polarized component in a specified direction of said substantial parallel light;

a sample cell for holding the specimen, which allows said substantial parallel light transmitted through said polarizer to transmit therethrough;

a coil for applying a magnetic field in the direction of an optical path of said substantial parallel light transmitting through said specimen in said sample cell;

a current source for supplying a current to said coil;

a magnetic field sweeping means for sweeping the current to be flown through said coil;

a magnetic field modulating means for modulating the current to be flown through said coil;

an analyzer for transmitting only a polarized component in another specified direction of said light transmitted through said specimen;

a photosensor for detecting the light transmitted through said analyzer;

a lock-in amplifier for conducting a phase sensitive detection on an output signal of said photosensor with reference to a vibration modulation signal from said magnetic field modulating means; and

a processing unit for calculating an optical activity of said specimen based on a magnetic field sweeping signal of said magnetic field sweeping means and the output signal from said lock-in amplifier.

21. The polarimeter in accordance with claim 20, wherein said specimen is urine.