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Title: Optical high acidity sensor

An apparatus and method for determining acid concentrations in solutions having acid concentrations of from about 0.1 Molar to about 16 Molar is disclosed. The apparatus includes a chamber for interrogation of the sample solution, a fiber optic light source for passing light transversely through the chamber, a fiber optic collector for receiving the collimated light after transmission through the chamber, a coating of an acid resistant polymeric composition upon at least one fiber end or lens, the polymeric composition in contact with the sample solution within the chamber and having a detectable response to acid concentrations within the range of from about 0.1 Molar to about 16 Molar, a measurer for the response of the polymeric composition in contact with the sample solution, and, a comparer of the measured response to predetermined standards whereby the acid molarity of the sample solution within the chamber can be determined. Preferably, a first lens is attached to the end of the fiber optic light source, the first lens adapted to collimate light from the fiber optic light source, and a second lens is attached to the end of the fiber optic collector for focusing the collimated light after transmission through the chamber.
Inventors:
 [1];  [2];  [3];  [4]
  1. (Jemez Springs, NM)
  2. (Los Alamos, NM)
  3. (Lynnwood, WA)
  4. (Martinez, GA)
Issue Date:
OSTI Identifier:
871060
Assignee:
United States of America as represented by United States (Washington, DC) LANL
Patent Number(s):
US 5650331
Contract Number:
W-7405-ENG-36
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
optical; acidity; sensor; apparatus; method; determining; acid; concentrations; solutions; molar; 16; disclosed; chamber; interrogation; sample; solution; fiber; optic; light; source; passing; transversely; collector; receiving; collimated; transmission; coating; resistant; polymeric; composition; lens; contact; detectable; response; range; measurer; comparer; measured; predetermined; standards; whereby; molarity; determined; preferably; attached; adapted; collimate; focusing; collimated light; sample solution; polymeric composition; light source; fiber optic; optic light; acid resistant; acid molarity; acid concentrations; resistant polymeric; measured response; /436/356/422/