Posts Tagged ‘Isotope Dilution’

Use Isotope Dilution when Reporting 1,4-Dioxane by EPA Method 8270x

1,4-dioxane results are prone to a low bias when analyzing hazardous waste by methods that incorporate an extract concentration step. Due to its high vapor pressure, 1,4-dioxane is driven off with the extraction solvent (typically dichloromethane). The authors of EPA Method 522 explicitly forbade extract concentration; they saw ¬†losses of over¬†30% when concentrating their extracts […]