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EP0266769A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Flow cell for photometer

Assignee: Hitachi Ltd
•
Filing: 1987-11-05
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Granted: —
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Expires: 2007-11-05
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Abstract

Abstract A flow cell for a photometer, which comprises a cell body integrated from a pair of cell body members (1, 1') by joining, at least one of which is provided with a linear groove (5, 5') on the joining surface of the cell body member from one end to another to the full length, as exposed to the bonding 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 (4) at a position near one end of the groove and a liquid sample outlet passage (4') 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.

Inventors

  • 👤 Masao Kamahori
  • 👤 Yoshio Watanabe
  • 👤 Junkichi Miura
  • 👤 Mamoru Taki
  • 👤 Hiroyuki Miyagi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 18:17
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/05; G01N2021/0346; G01N2021/054; G01N30/00; G01N30/02; G01N30/62; G01N30/74; G01N2030/746

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 177 words
A flow cell for a photometer which comprises a linear flow cell opening playing both roles of a liquid sample flow passage and a detecting light path, and a liquid sample inlet passage and a liquid sample outlet passage communicated with the flow cell opening, character­ized in that a cell body is 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 bonding surface, the groove constituting the flow cell opening by the integration of the cell body members, and is further provided with the liquid sample inlet passage at a position near one end of the groove and the liquid sample outlet passage at a posi­tion near the other end of the groove, both passages being communicated with the groove, and a pair of light transmission window members are joined with the flow cell body at both ends on the groove-open sides thereof.
Claim 2
Dependent Claim 177 words
A flow cell for a photometer which comprises a linear flow cell opening playing both roles of a liquid sample flow passage and a detecting light path, and a liquid sample inlet passage and a liquid sample outlet passage communicated with the flow cell opening, character­ized in that a cell body is 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 bonding surface, the groove constituting the flow cell opening by the integration of the cell body members, and is further provided with the liquid sample inlet passage at a position near one end of the groove and the liquid sample outlet passage at a posi­tion near the other end of the groove, both passages being communicated with the groove, and a pair of light transmission window members are joined with the flow cell body at both ends on the groove-open sides thereof.
Claim 3
Dependent Claim 48 words
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.
Claim 4
Dependent Claim 32 words
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.
Claim 5
Dependent Claim 27 words
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.
Claim 6
Dependent Claim 29 words
A flow cell for a photometer according to Claim 1, wherein the linear groove is provided with a light reflecting layer to the full length of the linear groove.

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