Several synthetic pyrethroids have indoor, as well as lawn, garden, and external structural barrier uses. This broad range of use patterns may result in the presence of multiple pyrethroids in influent/effluent waters and biosolids from publicly-owned treatment works (POTWs). The presentation will describe an analytical approach to analyzing these complex matrices for eight representative pyrethroids, using the previously reported NCI-GC-MS instrumental analysis with D6 stable isotope analogues as internal standards. Due to significant variability in the composition of biosolids from different POTWs, adding known amounts of surrogate compounds to each sample prior to extraction and then measuring recoveries in order to demonstrate acceptable method performance is highly desirable. The presentation will further describe the use of two selected D6 analogues as surrogates that closely match the method behavior of the eight target analytes. Details of a recently-validated biosolids method now in routine use will be reported along with associated method performance and surrogate stable isotope analogue recovery data.

Analysis of pyrethroid insecticides in complex environmental samples using stable isotope labeled standards as surrogates

246th National Meeting (2013)

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