Abstract
A simple and rapid focused ultrasound extraction (FU) based method is presented for the determination of persistent organic pollutants (POPs) in soil using a gas chromatography coupled to a mass detector with electron impact ionization. The main experimental parameters affecting the FU step have been optimized by applying a PERMANOVA and PCO analysis allowing us to obtain a maximum amount of information with a minimum number of assays. The limits of detection for POPs fell within the 0.9–6.8 ng/g d.w. interval; a linear method was used with correlation coefficients (r) higher than 0.99. Recovery percentages at low concentrations (25 ng/g d.w.) were 75.8 %–110 %, and at high concentrations (75 ng/g d.w.) 82.3 %–109 %; the evaluated precision as RSD% of repeatability and reproducibility were within a range of 0.5 %–11 % and 0.3 %–18 %, respectively.
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The authors acknowledge grants and fellowships (Posdoctoral fellowship of Flores-Ramírez, R) from National Council for Science and Technology sectorial funds CONACYT-SALUD (#182121).
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Flores-Ramírez, R., Medellín-Garibay, S.E., Castillo, C.G. et al. Application of Focused Ultrasound-Assisted Extraction to the Determination of Persistent Organic Pollutants (POPs) in Soil Samples. Bull Environ Contam Toxicol 95, 207–214 (2015). https://doi.org/10.1007/s00128-015-1545-1
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DOI: https://doi.org/10.1007/s00128-015-1545-1