Skip to Content
Find More Like This
Return to Search

Hexavalent chromium monitor

United States Patent

April 12, 2005
View the Complete Patent at the US Patent & Trademark Office
A monitor is provided for use in measuring the concentration of hexavalent chromium in a liquid, such as water. The monitor includes a sample cell, a light source, and a photodetector. The sample cell is in the form of a liquid-core waveguide, the sample cell defining an interior core and acting as a receiver for the liquid to be analyzed, the interior surface of the sample cell having a refractive index of less than 1.33. The light source is in communication with a first end of the sample cell for emitting radiation having a wavelength of about and between 350 to 390 nm into the interior core of the waveguide. The photodetector is in communication with a second end of the waveguide for measuring the absorption of the radiation emitted by the light source by the liquid in the sample cell. The monitor may also include a processor electronically coupled to the photodetector for receipt of an absorption signal to determine the concentration of hexavalent chromium in the liquid.
Tao; Shiquan (Starkville, MS), Winstead; Christopher B. (Starkville, MS)
Mississippi State University (Mississippi State, MS)
10/ 227,191
August 22, 2002
This invention was made with U.S. Government support under Contract No. DE-FC26-98FT-40395 awarded by the Department of Energy. The U.S. Government may have certain rights in this invention.