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View Actual EPA Method 3535 (PDF File)
EPA Method 3535:SOLID-PHASE EXTRACTION (SPE)
Summary:A measured volume of sample is adjusted to a specified pH and then extracted using a Solid-phase Extraction (SPE) device. Target analytes are eluted from the solid-phase media using methylene chloride or other appropriate solvent. The resulting solvent extract is dried using sodium sulfate and concentrated. The concentrated extract may be exchanged into a solvent compatible with subsequent cleanup procedures or determinative procedures employed for the measurement of the target analytes.
Scope:This method describes a procedure for isolating target organic analytes from aqueous samples using solid-phase extraction media. The method describes conditions for extracting organochlorine pesticides and phthalate esters from aqueous matrices including groundwater, wastewater, and TCLP leachates using disk extraction media. Performance data for these extractions are provided in Method 8081 (organochlorine pesticides) and Method 8061 (phthalate esters). The technique may also be applicable to semivolatiles and other extractable compounds. Other solid-phase extraction media configurations, e.g., SPE cartridges, may be employed provided that the laboratory demonstrates adequate performance for the analytes of interest.
Report Number:SW-846 Ch 4.2.1