Hybrid Electrochemical-Piezoelectric Sensor for RCRA Metals in Water

EPA Contract Number: 68D98146
Title: Hybrid Electrochemical-Piezoelectric Sensor for RCRA Metals in Water
Investigators: Andle, Jeffrey C.
Small Business: BIODE Inc.
EPA Contact: Manager, SBIR Program
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)


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, 33/50, Engineering, Chemistry, & Physics, Mercury, environmental monitoring, fate and transport, aquatic ecosystem, electrochemical technology, chromium & chromium compounds, electrochemical , aqueous mercury, Chromium, metal ions, stripping potentiometric analysis, mercury & mercury compounds, electrochemical analysis, piezoelectric, sensor, electrochemical sensor, Piezoelectric sensor, heavy metals, metals, sensor technology

Progress and Final Reports:

  • Final Report