Synthetic pyrethroid insecticides as a class share characteristics that present analytical challenges.  Extremely low water solubilities (low ppb) result in adsorption of pyrethroids from aqueous solutions onto container walls, as well as onto any particulate matter present. The predominant approach to instrumental analysis for pyrethroids is gas chromatography (often coupled with negative chemical ionization and mass spectral detection), a technique sometimes hampered by matrix effects and detector response drift.  Also, pyrethroids are of interest at atypically low concentration levels due to low toxicity endpoints.  This requires the use of methodology which can achieve extremely low limits of detection.  At these low levels, control of laboratory or cross-contamination becomes a critical factor.  It also becomes more difficult to obtain �clean� (analyte-free) representative environmental samples for fortification and recovery experiments.  We report herein on analytical strategies that have been developed to overcome these myriad challenges.

Analytical challenges to the monitoring of trace levels of pyrethroid insecticides in environmental samples

248th National Meeting (2014)

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