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Title: Optrode for sensing hydrocarbons

Abstract

A two-phase system employing the Fujiwara reaction is provided for the fluorometric detection of halogenated hydrocarbons. A fiber optic is utilized to illuminate a column of pyridine trapped in a capillary tube coaxially attached at one end to the illuminating end of the fiber optic. A strongly alkaline condition necessary for the reaction is maintained by providing a reservoir of alkali in contact with the column of pyridine, the surface of contact being adjacent to the illuminating end of the fiber optic. A semipermeable membrane caps the other end of the capillary tube, the membrane being preferentially permeable to the halogenated hydrocarbon and but preferentially impermeable to water and pyridine. As the halogenated hydrocarbon diffuses through the membrane and into the column of pyridine, fluorescent reaction products are formed. Light propagated by the fiber optic from a light source, excites the fluorescent products. Light from the fluorescence emission is also collected by the same fiber optic and transmitted to a detector. The intensity of the fluorescence gives a measure of the concentration of the halogenated hydrocarbons.

Inventors:
 [1];  [2];  [3];  [1]
  1. Bethel Island, CA
  2. Lafayette, CA
  3. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
866255
Patent Number(s):
4666672
Assignee:
University of California (Berkeley, CA)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
optrode; sensing; hydrocarbons; two-phase; employing; fujiwara; reaction; provided; fluorometric; detection; halogenated; fiber; optic; utilized; illuminate; column; pyridine; trapped; capillary; tube; coaxially; attached; illuminating; strongly; alkaline; condition; maintained; providing; reservoir; alkali; contact; surface; adjacent; semipermeable; membrane; caps; preferentially; permeable; hydrocarbon; impermeable; water; diffuses; fluorescent; products; formed; light; propagated; source; excites; fluorescence; emission; collected; transmitted; detector; intensity; measure; concentration; semipermeable membrane; halogenated hydrocarbons; permeable membrane; capillary tube; light source; fiber optic; reaction product; reaction products; fluorescence emission; halogenated hydrocarbon; tube coaxially; alkaline condition; coaxially attached; fluorescent products; sensing hydrocarbons; pyridine trapped; fujiwara reaction; fluorescent product; fluorometric detection; /422/436/

Citation Formats

Miller, Holly, Milanovich, Fred P, Hirschfeld, Tomas B, and Miller, Fred S. Optrode for sensing hydrocarbons. United States: N. p., 1987. Web.
Miller, Holly, Milanovich, Fred P, Hirschfeld, Tomas B, & Miller, Fred S. Optrode for sensing hydrocarbons. United States.
Miller, Holly, Milanovich, Fred P, Hirschfeld, Tomas B, and Miller, Fred S. Thu . "Optrode for sensing hydrocarbons". United States. https://www.osti.gov/servlets/purl/866255.
@article{osti_866255,
title = {Optrode for sensing hydrocarbons},
author = {Miller, Holly and Milanovich, Fred P and Hirschfeld, Tomas B and Miller, Fred S},
abstractNote = {A two-phase system employing the Fujiwara reaction is provided for the fluorometric detection of halogenated hydrocarbons. A fiber optic is utilized to illuminate a column of pyridine trapped in a capillary tube coaxially attached at one end to the illuminating end of the fiber optic. A strongly alkaline condition necessary for the reaction is maintained by providing a reservoir of alkali in contact with the column of pyridine, the surface of contact being adjacent to the illuminating end of the fiber optic. A semipermeable membrane caps the other end of the capillary tube, the membrane being preferentially permeable to the halogenated hydrocarbon and but preferentially impermeable to water and pyridine. As the halogenated hydrocarbon diffuses through the membrane and into the column of pyridine, fluorescent reaction products are formed. Light propagated by the fiber optic from a light source, excites the fluorescent products. Light from the fluorescence emission is also collected by the same fiber optic and transmitted to a detector. The intensity of the fluorescence gives a measure of the concentration of the halogenated hydrocarbons.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

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