Potential analytical interferences and seasonal variability in diethyltoluamide environmental monitoring programs

Chemosphere
Sylvain MerelShane A Snyder

Abstract

N,N-diethyl-m-toluamide (DEET), the active component of many insect repellents, is among the most frequently detected compounds in aqueous environments with concentrations reported in the ng L(-1) to μg L(-1) range. However, DEET is often detected in blanks and reported concentrations differ significantly depending on the analytical technique employed. In addition, relatively sparse data are available regarding the seasonal variability of DEET concentrations in water and there are apparent inconsistencies with expected use patterns. Therefore, the present study investigates potential interferences affecting the detection and quantification of DEET then the geographical and seasonal variations of DEET concentrations. To examine potential analytical interferences, DEET was analyzed in five geographically-diverse wastewater effluents using both gas chromatography and liquid chromatography coupled to mass spectrometric detectors. At times, the concentrations quantified by the employed analytical methods varied significantly. Five compounds with similar molecular weights and structures as DEET were investigated as potential mimics and some were shown to induce an overestimation of DEET. Further experimentation suggested that the sol...Continue Reading

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Citations

Apr 8, 2016·Environment International·Tarun AnumolShane A Snyder
May 29, 2016·Journal of Hazardous Materials·Massimiliano SgroiFederico G A Vagliasindi
Dec 22, 2016·Environmental Science & Technology·Patrick R RoehrdanzPatricia A Holden
Jul 2, 2019·International Journal of Phytoremediation·Melanie L Hedgespeth, Elizabeth Guthrie Nichols
Feb 21, 2018·Environmental Science and Pollution Research International·Andrew D McEachranElizabeth Guthrie Nichols
Aug 7, 2019·The Science of the Total Environment·Melanie L HedgespethElizabeth Guthrie Nichols

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