CASSEN’s Recent Method Development Project: Methylsiloxanes in Great Lake Fish
Volatile methylsiloxanes (VMS) are present in many consumer and personal care products. Due to the increasing concerns pertaining to their persistence and bioaccumulation in the environment, more focus has been placed on their presence in biota such as fish. Determination of VMS in fish is a challenging task due to the ultra trace levels required, their volatility, lipid content and the potential contamination from extraction process.
CASSEN has developed an efficient method using simultaneous thermal stripping and purging of the fish tissues, allowing the VMS to enter the sorbent in a reasonably dry state and analyzed by gas chromatography/mass spectrometry. C13-labelled VMS was used to determine the concentrations and recoveries.
Subsequent to the development, Great Lake fish tissues were supplied by Environment Canada and analyzed at CASSEN. The results are presented in a joint publication entitled “Concentrations and trophic magnification of cyclic siloxanes in aquatic biota from the Western Basin of Lake Erie, Canada” in Environmental Pollution, Vol 186, 2014.