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Hexavalent chromium monitor

Patent ·
OSTI ID:1175318
;
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.
Research Organization:
Mississippi State University, Mississippi State, MS (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-98FT40395;
Assignee:
Mississippi State University (Mississippi State, MS)
Patent Number(s):
6,878,943
Application Number:
10/227,191
OSTI ID:
1175318
Country of Publication:
United States
Language:
English

References (11)

Environmental Analysis journal June 1999
High-Sensitivity Gas Sensors Based on Gas-Permeable Liquid Core Waveguides and Long-Path Absorbance Detection journal November 1998
A Raman Waveguide Detector for Liquid Chromatography journal November 1999
Carcinogenic Chromium(VI) Induces Cross-Linking of Vitamin C to DNA in Vitro and in Human Lung A549 Cells † journal March 2002
Hydrogen Sulfide Gas Treatment of Cr(VI)-Contaminated Sediment Samples from a Plating-Waste Disposal SiteImplications for in-Situ Remediation journal November 1999
Permeability, Cytotoxicity, and Genotoxicity of Chromium(V) and Chromium(VI) Complexes in V79 Chinese Hamster Lung Cells † journal February 1998
Chromium speciation in natural waters draining contaminated land, Glasgow, U.K. journal January 1999
Volatilization of refractory elements as 8-hydroxyquinolinate complexes for sample introduction in inductively coupled plasma atomic emission spectrometry journal January 1995
Low-loss liquid-core optical fiber for low-refractive-index liquids: fabrication, characterization, and application in Raman spectroscopy journal January 1997
Raman Performance Characteristics of Teflon®-AF 2400 Liquid-Core Optical-Fiber Sample Cells journal October 1999
Design and Performance of Nitride-based UV LEDs journal January 2000

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