GB1416182A - Photometric analyser - Google Patents

Photometric analyser

Info

Publication number
GB1416182A
GB1416182A GB903672A GB903672A GB1416182A GB 1416182 A GB1416182 A GB 1416182A GB 903672 A GB903672 A GB 903672A GB 903672 A GB903672 A GB 903672A GB 1416182 A GB1416182 A GB 1416182A
Authority
GB
United Kingdom
Prior art keywords
sample
detectors
filters
paths
feb
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
Application number
GB903672A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB903672A priority Critical patent/GB1416182A/en
Publication of GB1416182A publication Critical patent/GB1416182A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/251—Colorimeters; Construction thereof

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (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)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1416182 Photometric analyzers IMPERIAL CHEMICAL INDUSTRIES Ltd 16 Feb 1973 [28 Feb 1972] 9036/72 Heading G1A In an apparatus for photometric analysis of a sample, radiation from a source S is passed along two paths, one containing a sample cell C and the other opionally containing a compensation cell R; each of the two paths contains a beam splitter B, B' to create four subsidiary paths terminating in filters F 1 -F 4 and photo-detectors D 1 -D 4 . Filters F 1 and F3 are identical, and are chosen to pass only a wavelength which is absorbed by the sample under test. The filters F 2 and F 4 are chosen to pass only wavelengths not absorbed by the sample. If the outputs of detectors D 1 -D 4 are respectively X 1 - X 4 it is found that the sample concentration may be derived from the expression A log 10 X 2 .X 3 /X 1 .X 4 + B where A and B are constants. The arrangement of detectors is such that effects due to variations in source brightness or dirt on the cells R and C, cancel out. Suitable wavelengths for chlorine measurement are given.
GB903672A 1972-02-28 1972-02-28 Photometric analyser Expired GB1416182A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB903672A GB1416182A (en) 1972-02-28 1972-02-28 Photometric analyser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB903672A GB1416182A (en) 1972-02-28 1972-02-28 Photometric analyser

Publications (1)

Publication Number Publication Date
GB1416182A true GB1416182A (en) 1975-12-03

Family

ID=9864161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB903672A Expired GB1416182A (en) 1972-02-28 1972-02-28 Photometric analyser

Country Status (1)

Country Link
GB (1) GB1416182A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2178841A (en) * 1985-08-08 1987-02-18 Graviner Ltd Gas detection systems
EP0240742A2 (en) * 1986-03-07 1987-10-14 TERUMO KABUSHIKI KAISHA trading as TERUMO CORPORATION Apparatus and method for measuring amount of oxygen in blood
DE4021556A1 (en) * 1990-07-06 1992-01-09 Draegerwerk Ag Concn. measuring arrangement for gaseous and/or vapour components - uses substance causing colour reaction in test tube, opto-electronic and/or visual detection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2178841A (en) * 1985-08-08 1987-02-18 Graviner Ltd Gas detection systems
EP0240742A2 (en) * 1986-03-07 1987-10-14 TERUMO KABUSHIKI KAISHA trading as TERUMO CORPORATION Apparatus and method for measuring amount of oxygen in blood
EP0240742A3 (en) * 1986-03-07 1989-01-11 TERUMO KABUSHIKI KAISHA trading as TERUMO CORPORATION Apparatus and method for measuring amount of oxygen in blood
DE4021556A1 (en) * 1990-07-06 1992-01-09 Draegerwerk Ag Concn. measuring arrangement for gaseous and/or vapour components - uses substance causing colour reaction in test tube, opto-electronic and/or visual detection

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930214