Headspace Solid-Phase Microextraction (HS SPME) has been shown to effectively extract pesticides and PCBs from aqueous samples at the expected ultra-trace levels (parts per quadrillion) of alpine lakes.  Several variables of the HS SPME technique have been adequately evaluated including water temperature and length of fiber exposure, but surprisingly, analyte recovery as a function of analyte concentration and storage time has not been included in previous studies.  This investigation evaluates the recovery of chlorinated hydrocarbons, such as DDT, in concentrations from parts per quadrillion to parts per billion in lake water samples.  The HS SPME technique was further used to determine the concentration of chlorinated pesticides in Pacific Northwest alpine lakes.<br/>

Study of analyte recovery using headspace solid-phase microextraction

249th National Meeting (2015)

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