New Method US EPA 625 with Solid Phase Extraction for Challenging Wastewaters
Poster Presentation
Prepared by Z. Grosser, A. Cannon, D. Gallagher, M. Ebitson, W. Jones
Horizon Technology Inc., 16 Northwestern Drive, Salem, NH, 03079, United States
Contact Information: [email protected]; 603-386-3654
ABSTRACT
US EPA method 625 is a general semivolatile method for wastewater analysis applied to a large suite of target analytes. Although method 625 was developed a number of years ago, through the EPA Office of Water, Office of Science and Technology, the method has been updated several times. As new technology is developed either for the determinative measurement or, earlier in the analysis process, for the sample preparation, data must be collected to demonstrate that the new technology is compliant and reproducible.
In this paper we will describe the use of solid phase extraction for 1 liter samples as well as for 100 mL samples, rather than liquid/liquid extraction, for preparing wastewater samples for GC/MS analysis. The extract will be dried using an alternative to sodium sulfate, a membrane for physical separation of water. The quality control criteria currently in method 625 will be used for evaluation of the new method options with ASTM synthetic waste water samples as specified in a recent Independent Laboratories Institute (ILI) led effort to study SPE as a sample preparation technique for method 625.
Poster Presentation
Prepared by Z. Grosser, A. Cannon, D. Gallagher, M. Ebitson, W. Jones
Horizon Technology Inc., 16 Northwestern Drive, Salem, NH, 03079, United States
Contact Information: [email protected]; 603-386-3654
ABSTRACT
US EPA method 625 is a general semivolatile method for wastewater analysis applied to a large suite of target analytes. Although method 625 was developed a number of years ago, through the EPA Office of Water, Office of Science and Technology, the method has been updated several times. As new technology is developed either for the determinative measurement or, earlier in the analysis process, for the sample preparation, data must be collected to demonstrate that the new technology is compliant and reproducible.
In this paper we will describe the use of solid phase extraction for 1 liter samples as well as for 100 mL samples, rather than liquid/liquid extraction, for preparing wastewater samples for GC/MS analysis. The extract will be dried using an alternative to sodium sulfate, a membrane for physical separation of water. The quality control criteria currently in method 625 will be used for evaluation of the new method options with ASTM synthetic waste water samples as specified in a recent Independent Laboratories Institute (ILI) led effort to study SPE as a sample preparation technique for method 625.
