Chemistry: analytical and immunological testing – Optical result – With reagent in absorbent or bibulous substrate
Patent
1994-09-13
1996-02-06
Warden, Robert J.
Chemistry: analytical and immunological testing
Optical result
With reagent in absorbent or bibulous substrate
436172, 422 52, 422 57, 422 8208, G01N 2164, G01N 2176
Patent
active
054895367
ABSTRACT:
A method for making a composition for measuring the concentration of chloated aromatic compounds in aqueous fluids, and an optical probe for use with the method. The composition comprises a hydrophobic polymer matrix, preferably polyamide, with a fluorescent indicator uniformly dispersed therein. The indicator fluoresces in the presence of the chlorinated aromatic compounds with an intensity dependent on the concentration of these compounds in the fluid of interest, such as 8-amino-2-naphthalene sulfonate. The probe includes a hollow cylindrical housing that contains the composition in its distal end. The probe admits an aqueous fluid to the probe interior for exposure to the composition. An optical fiber transmits excitation light from a remote source to the composition while the indicator reacts with chlorinated aromatic compounds present in the fluid. The resulting fluorescence light signal is reflected to a second optical fiber that transmits the light to a spectrophotometer for analysis.
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Bhat N.
Moser William R.
Nixon Harold M.
The United States of America as represented by the Department of
Tumm Brian R.
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