title: Application of Focused Ultrasound-Assisted Extraction to the Determination of Persistent Organic Pollutants (POPs) in Soil Samples.
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.
authors.affiliation: Centro Nacional de Bioanálisis (CENBIOS)-Centro de Investigación Aplicada en Ambiente y Salud, CIACYT, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550, 78210, San Luis Potosí, S.L.P., Mexico.
authors.forename: R
authors.initials: R
authors.lastname: Flores-Ramírez
authors.forename: S E
authors.initials: SE
authors.lastname: Medellín-Garibay
authors.forename: C G
authors.initials: CG
authors.lastname: Castillo
authors.forename: C A
authors.initials: CA
authors.lastname: Ilizaliturri-Hernández
authors.forename: B A
authors.initials: BA
authors.lastname: Zuki-Orozco
authors.forename: L
authors.initials: L
authors.lastname: Batres-Esquivel
authors.forename: F
authors.initials: F
authors.lastname: Díaz-Barriga
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D015203:Reproducibility of Results; D012989:Soil Pollutants / Q000032:analysis*; D014465:Ultrasonics
chemical_list: D012989:Soil Pollutants