Implementation of a Fully Automated Process Purge-and-Trap gas Chromatograph at an Environmental Remediation Site

摘要

The AQUASCAN, a commercially available, fully automated purge-and-trap gas chromatograph from Sentex Systems Inc. (Ridgefield, N.J), was implemented and evaluated as an in-field, automated monitoring system of contaminated groundwater at an active DOE remediation site in Pinellas, FL. Though teh AQUASCAN is designed as a stand alone process analytical unit, implementation at this site required additional hardware. The hardware included a sample dilution system and a method for delivering standard solution to the gas chromatograph for automated calibration. As a result of the evaluation the system was determined to be a reliable and accurate instrument. The AQUASCAN reported concentraton values for methylene chloride, trichloroethylene, and toluene in the Pinellas ground water were within 20percent of reference laboratory values.