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A FLUOROMETRIC SENSOR FOR Cr(VI)

Award Information
Agency: Environmental Protection Agency
Branch: N/A
Contract: N/A
Agency Tracking Number: 30640
Amount: $63,204.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Timeline
Solicitation Year: N/A
Award Year: 1995
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
939 S. Kirkwood Rd., St. Louis, MO, 63122
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr. Arthur R. Henn
 () -
Business Contact
 Dr. Arthur R. Henn
Phone: (314) 878-9558
Research Institution
N/A
Abstract
Hexavalent chromium, Cr(VI), in the usual form of oxo species, is used in manyindustrial processes and products. As a consequence, Cr(VI)= containingcompounds are often found in wastewater and contaminated sites. Since Cr(VI) isconsidered highly toxic and carcinogenic, it is extremely important to have areliable, easy-to-use, sensitive monitor for determining Cr(VI) concentrationsin process, on site, in real time.This proposal presents a description of the preliminary research necessary todevelop an easy-to-use, portable, sensitive, selective fiber-optic sensor forCr(VI). The envisioned sensor is based on the reportedly unique ability ofCr(VI) to quench the visible florescence of Rhodamine S, which is to beimmobilized in a matrix prepared by proven sol-gel techniques. One of the keyobjectives of the present research is to verify the rare selectivity of theRhodamine S system. Because silica sol-gel tends to dissolve in strong base,other oxide gel systems will be investigated as matrices to provide a sensorresistant to highly alkaline media as well.

* Information listed above is at the time of submission. *

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