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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 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. 6 figs.

Inventors:
; ; ;
Issue Date:
OSTI Identifier:
7148194
Patent Number(s):
4666672 A
Application Number:
PPN: US 6-721150
Assignee:
Univ. of California, Berkeley, CA (United States) PTO; EDB-94-124712
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Patent File Date: 8 Apr 1985
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ORGANIC HALOGEN COMPOUNDS; FLUORESCENCE SPECTROSCOPY; CONCENTRATION RATIO; HYDROXIDES; MEMBRANE TRANSPORT; OPTICAL FIBERS; PH VALUE; EMISSION SPECTROSCOPY; FIBERS; HYDROGEN COMPOUNDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; SPECTROSCOPY; 400102* - Chemical & Spectral Procedures

Citation Formats

Miller, H., Milanovich, F.P., Hirschfeld, T.B., and Miller, F.S. Optrode for sensing hydrocarbons. United States: N. p., 1987. Web.
Miller, H., Milanovich, F.P., Hirschfeld, T.B., & Miller, F.S. Optrode for sensing hydrocarbons. United States.
Miller, H., Milanovich, F.P., Hirschfeld, T.B., and Miller, F.S. Tue . "Optrode for sensing hydrocarbons". United States.
@article{osti_7148194,
title = {Optrode for sensing hydrocarbons},
author = {Miller, H. and Milanovich, F.P. and Hirschfeld, T.B. and Miller, F.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 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. 6 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {5}
}