Grantee Research Project Results
A Fluorometric Sensor for Cr(VI)
EPA Contract Number: 68D50096Title: A Fluorometric Sensor for Cr(VI)
Investigators: Henn, Arthur R.
Small Business: Marktek
EPA Contact: Richards, April
Phase: I
Project Period: September 1, 1995 through March 1, 1996
Project Amount: $63,204
RFA: Small Business Innovation Research (SBIR) - Phase I (1995) RFA Text | Recipients Lists
Research Category: Ecological Indicators/Assessment/Restoration , SBIR - Monitoring , Small Business Innovation Research (SBIR)
Description:
Hexavalent chromium, Cr(VI), in the usual form of oxo species, is used in many industrial processes and products. As a consequence, Cr(VI)= containing compounds are often found in wastewater and contaminated sites. Since Cr(VI) is considered highly toxic and carcinogenic, it is extremely important to have a reliable, easy-to-use, sensitive monitor for determining Cr(VI) concentrations in process, on site, in real time.This proposal presents a description of the preliminary research necessary to develop an easy-to-use, portable, sensitive, selective fiber-optic sensor for Cr(VI). The envisioned sensor is based on the reportedly unique ability of Cr(VI) to quench the visible florescence of Rhodamine S, which is to be immobilized in a matrix prepared by proven sol-gel techniques. One of the key objectives of the present research is to verify the rare selectivity of the Rhodamine S system. Because silica sol-gel tends to dissolve in strong base, other oxide gel systems will be investigated as matrices to provide a sensor resistant to highly alkaline media as well.
Supplemental Keywords:
small business, SBIR, air emissions, engineering, chemistry., RFA, Scientific Discipline, Toxics, Waste, Water, Ecosystem Protection/Environmental Exposure & Risk, National Recommended Water Quality, hexavalent chromium, hexavalent chromium waste, Chemistry, Monitoring/Modeling, Analytical Chemistry, Hazardous Waste, 33/50, Hazardous, Engineering, Chemistry, & Physics, monitoring, chromium & chromium compounds, continuous measurement, field portable monitoring, Chromium, continuous monitoring, fiber optics, compliance, portable detection system, carcinogens, fluorescence detection, carcinogen, measurement, sensor, real time monitoring, fluorometer, real-time monitoringProgress and Final Reports:
The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.