Flow-through cell for a photometer formed using a pair of cell body members

• US 4,823,168 A
• Filed: 11/04/1987
• Issued: 04/18/1989
• Est. Priority Date: 11/07/1986
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Watanabe, Yoshio, Kamahori, Masao, Miura, Junkichi, Taki, Mamoru, Miyagi, Hiroyuki
• Primary Examiner(s): McGraw, Vincent P.
• Application Number:
  US07/116,543
• Time in Patent Office: 531 Days
• Field of Search: 356/246, 356/440, 356/410, 250/576
• US Class Current: 356/246
• CPC Class Codes: G01N 2021/0346 Capillary cells; Microcells
• CPC Class Codes: G01N 2021/054 Bubble trap; Debubbling
• CPC Class Codes: G01N 2030/746 detecting along the line of flow, e.g. axial
• CPC Class Codes: G01N 21/05 Flow-through cuvettes G01N21/09 takes precedence; handling fluid samples G01N1/10
• CPC Class Codes: G01N 30/74 Optical detectors measurement of intensity, velocity, spectral content, polarisation, or phase of infrared, visible or ultraviolet light G01J

Abstract

A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, at least one of which is provided with a linear groove on the joining surface of the cell body member from one end to another to the full length, as exposed to the joining surface, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the grooves, the linear groove being provided with a light reflecting layer to the full length of the linear groove, and a pair of light transmission window members joined with the flow cell body at both ends on the groove-open sides thereof is provided, where polishing of the grooves is readily carried out and random reflection of light or absorption of light due to poor reflection is reduced, and the turbulent flow of a liquid sample and generation of noise are suppressed.

Claims

1. A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, at least one of which is provided with a linear groove on the joining surface of the cell body member from one end to another to the full length, as exposed to the joining surface, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being formed of a material selected from the group consisting of glass, silicon and silicon oxide, and a pair of light transmission window members joined with the flow cell body at both ends of the groove-open sides thereof.

2. A flow cell for a photometer according to claim 1, wherein the liquid sample inlet passage and the liquid sample outlet passage are provided as grooves on the joining surface of the cell body member, as exposed to the joining surface and communicated with the first linear groove.

3. A flow cell for a photometer according to claim 2, wherein the liquid sample inlet passage and the liquid sample outlet passage are communicated with the first linear grooves at round corners.

4. A flow cell for a photometer according to claim 2, wherein the liquid sample inlet passage and the liquid sample outlet passage are in a S shape.

5. A flow cell for a photometer according to claim 1, wherein said linear grooves are grooves provided by fixing a pair of body members together and drilling through at least one of the body members to form grooves, and then polishing the grooves, so as to form the linear grooves of the cell body members.

6. A flow cell for a photometer according to claim 1, wherein the cell body members and light transmission window members are made of the same material.

7. A flow cell for a photometer according to claim 1, wherein the pair of cell body members are joined by bonding.

8. A flow cell for a photometer according to claim 7, wherein the bonding is a melt bonding or pressure bonding.

9. A flow cell for a photometer according to claim 1, wherein the liquid sample passage and detecting light path have a cross-sectional shape of a circle.

10. A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, both of which are provided with linear grooves symmetrically to each other on the joining surfaces of the cell body members from one end to another to the full length, as exposed to the joining surfaces, the grooves playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and at least one of which is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being formed of a material selected from the group consisting of glass, silicon and silicon oxide, and a pair of light transmission window members joined with the flow cell body at both ends on the groove-open sides thereof.

11. A flow cell for a photometer according to claim 10, wherein the liquid sample inlet passage and the liquid sample outlet passage are provided as grooves symmetrically to each other on the joining surfaces of both cell body members, as exposed to the joining surfaces and communicated with the first linear grooves.

12. A flow cell for a photometer according to claim 11, wherein the liquid sample inlet passage and the liquid sample outlet passage are communicated with the first linear grooves at round corners.

13. A flow cell for a photometer according to claim 11, wherein the liquid sample inlet passage and the liquid sample outlet passage are in a S shape.

14. A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, at least one of which is provided with a linear groove on the joining surface of the cell body member from one end to another to the full length, as exposed to the joining surface, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being made of a material selected from the group consisting of glass, silicon and silicon oxide, the linear groove being provided with a light reflecting layer to the full length of the linear groove, and a pair of light transmission window members joined with the flow cell body at both ends on the groove-open sides thereof.

15. A flow cell for a photometer according to claim 14, wherein the liquid sample inlet passage and the liquid sample outlet passage are provided as grooves on the joining surface of the cell body member, as exposed to the joining surface and communicated with the first linear groove.

16. A flow cell for a photometer according to claim 14, wherein the liquid sample inlet passage and the liquid sample outlet passage are communicated with the first linear grooves at round corners.

17. A flow cell for a photometer according to claim 14, wherein the liquid sample inlet passage and the liquid sample outlet passage are in a S shape.

18. A flow cell for a photometer according to claim 14, wherein the photometer is adapted to have a liquid sample pass therethrough, the liquid sample including a solvent, and wherein said light reflecting layer is composed of a glass having a lower refractive index than that of the solvent of the liquid sample.

19. A flow cell for a photometer according to claim 14, wherein the light reflecting layer is made of aluminum, and has a coating of silicon oxide thereon.

20. A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members by joining, both of which are provided with linear grooves symmetrically to each other on the joining surfaces of the cell body members from one end to another to the full length, as exposed to the joining surfaces, the groove playing both roles of a liquid sample passage and a detecting light path by the integration of the cell body members, and at least one of which is further provided with a liquid sample inlet passage at a position near one end of the groove and a liquid sample outlet passage at a position near the other end of the groove, both passages being communicated with the groove, the cell body members being made of a material selected from the group consisting of glass, silicon and silicon oxide, the linear grooves being provided with a light reflecting layer to the full length of the linear grooves, and a pair of light transmission window members joined with the flow cell body at both ends on the groove open sides thereof.

21. A flow cell for a photometer according to claim 20, wherein the liquid sample inlet passage and the liquid sample outlet passage are provided as grooves symmetrically to each other on the joining of both cell body members, as exposed to the joining surfaces and communicated with the first linear grooves.

22. A flow cell for a photometer according to claim 21, wherein the liquid sample inlet passage and the liquid sample outlet passage are communicated with the first linear grooves at round corners.

23. A flow cell for a photometer according to claim 21, wherein the liquid sample inlet passage and the liquid sample outlet passage are in a S shape.