Grantee Research Project Results
Hybrid Electrochemical-Piezoelectric Sensor for RCRA Metals in Water
EPA Contract Number: 68D98146Title: Hybrid Electrochemical-Piezoelectric Sensor for RCRA Metals in Water
Investigators: Andle, Jeffrey C.
Small Business: BIODE Inc.
EPA Contact: Richards, April
Phase: I
Project Period: September 1, 1998 through March 1, 1999
Project Amount: $69,996
RFA: Small Business Innovation Research (SBIR) - Phase I (1998) RFA Text | Recipients Lists
Research Category: Small Business Innovation Research (SBIR)
Description:
BIODE has developed a hybrid sensor that combines the sensitivity of piezoelectric nanobalance technology with the selectivity of stripping potentiometric analysis for the detection of ionic mercury in aqueous samples. This previous SBIR project has resulted in a single sensor that is capable of detecting single nanogram per milliliter levels of ionic mercury. By improving the electrochemical circuitry and using suitable electrode modification, the technique will be extended to the detection and speciation of additional toxic heavy metal ions and their organometallic complexes. The long-term goal of this SBIR project is an array of electrochemical nanobalances for the simultaneous detection and speciation of all RCRA metals. By pursuing improvements in the piezoelectric element, 10-fold to 100-fold sensitivity increases will be possible. Phase I will demonstrate the feasibility of this sensor system by focusing on the speciation of ionic chromium. Under this project BIODE will demonstrate the ability of the sensor to detect carcinogenic chromium (VI) while distinguishing it from the essential nutrient, chromium (III), and the species already detectable by the sensor, Mercury (II). Phase I will continue to employ quartz shear horizontal acoustic plate mode (SHAPM) sensors with single nanogram sensitivity and improved sensitivity.Supplemental Keywords:
small business, SBIR, monitoring, analytical, engineering, chemistry, EPA., RFA, Scientific Discipline, Toxics, Water, Ecosystem Protection/Environmental Exposure & Risk, mercury transport, Chemistry, Monitoring/Modeling, Analytical Chemistry, Engineering, Chemistry, & Physics, 33/50, Mercury, electrochemical technology, environmental monitoring, aquatic ecosystem, fate and transport, chromium & chromium compounds, electrochemical , aqueous mercury, Chromium, metal ions, stripping potentiometric analysis, electrochemical analysis, piezoelectric, mercury & mercury compounds, sensor, electrochemical sensor, Piezoelectric sensor, metals, sensor technology, heavy metalsProgress 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.