Your browser doesn't support javascript.
loading
Multiresidue extraction of current-use pesticides from complex solid matrices using energized dispersive guided extraction with analysis by gas and liquid chromatography tandem mass spectroscopy.
Black, Gabrielle P; Woodward, Emily E; Sanders, Corey J; Gross, Michael S; Hladik, Michelle L.
Afiliação
  • Black GP; U.S. Geological Survey, California Water Science Center, Sacramento, CA, 95819, USA. Electronic address: gpblack@usgs.gov.
  • Woodward EE; U.S. Geological Survey, Pennsylvania Water Science Center, Bridgeville, PA, 15017, USA.
  • Sanders CJ; U.S. Geological Survey, California Water Science Center, Sacramento, CA, 95819, USA.
  • Gross MS; U.S. Geological Survey, California Water Science Center, Sacramento, CA, 95819, USA.
  • Hladik ML; U.S. Geological Survey, California Water Science Center, Sacramento, CA, 95819, USA.
Chemosphere ; 327: 138550, 2023 Jun.
Article em En | MEDLINE | ID: mdl-37001756
The development of sample processing techniques that recover a broad suite of pesticides from solid matrices, while mitigating coextracted matrix interferences, and reducing processing time is beneficial for high throughput analyses. The objective of this study was to evaluate the effectiveness of an automated extraction system for pesticide analyses in solid environmental samples. An Energized Dispersive Guided Extraction (EDGE) system was used to evaluate two different extraction solvents in optimizing the extraction of 210 pesticides and pesticide transformation products. A graphitized carbon cleanup step was implemented, and three elution solvents were evaluated separately for analyte recoveries. Recoveries between 70 and 130% were achieved for 167 compounds in a test soil using acetonitrile as an extraction solvent and carbon cleanup with acetonitrile and dichloromethane elutions. Nine field samples (soil, sediment, and biosolids) were extracted using the newly developed method and were compared with a previously validated pressurized liquid extraction (PLE) method using an Accelerated Solvent Extraction (ASE) system. Concentrations obtained from the two methods were comparable (linear R2 > 0.999), suggesting similar performance between the EDGE and PLE extractions in complex matrices. The new method provided slightly better sensitivities in comparison to the PLE method, ranging from 0.09 to 2.56 ng g-1. The method presented here significantly reduces extraction setup and runtimes while also minimizing the volume of carcinogenic solvents (e.g., dichloromethane) used in the laboratory and presents a sensitive multiresidue method for a wide range of pesticides in solid matrices.
Assuntos
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Praguicidas / Resíduos de Praguicidas Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Praguicidas / Resíduos de Praguicidas Idioma: En Ano de publicação: 2023 Tipo de documento: Article