Hard cap espresso extraction-stir bar preconcentration of polychlorinated biphenyls in soil and sediments

A Nespresso© hard cap espresso machine has been employed for the quantitative extraction of polychlorinated biphenyls (PCBs) from sediments and soils. Sample extraction was performed from five grams of sample in less than 40 s, with 200 mL ethanol 40% (v/v) in water and PCBs were concentrated using...

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Bibliographic Details
Published in:Analytica chimica acta 2017-02, Vol.952, p.41-49
Main Authors: Gallart-Mateu, Daniel, Pastor, Agustín, de la Guardia, Miguel, Armenta, Sergio, Esteve-Turrillas, Francesc A.
Format: Article
Language:English
Subjects:
Coffee
Congeners
Ethanol
Gas chromatography
Hard cap espresso machine
Nespresso
PCB
PCB compounds
Polychlorinated biphenyls
Pressurized solvent extraction
Reference materials
Sediments
Soil analysis
Soils
Solvent extraction
Statistical analysis
Statistical methods
Stir bar sorptive extraction
Thermal desorption
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Summary:A Nespresso© hard cap espresso machine has been employed for the quantitative extraction of polychlorinated biphenyls (PCBs) from sediments and soils. Sample extraction was performed from five grams of sample in less than 40 s, with 200 mL ethanol 40% (v/v) in water and PCBs were concentrated using stir bar sorptive extraction (SBSE) and determined by thermal desorption-gas chromatography-tandem mass spectrometry (TD-GC-MS-MS). Eleven PCB congeners (28, 52, 77, 80, 81, 101, 118, 138, 153,169, and 180) were determined in soils and sediments with limits of quantification in the 0.03–0.08 ng g−1 range. Extraction efficiency was established by the analysis of soil samples spiked with the studied PCBs at concentrations from 0.1 to 10.0 ng g−1, obtaining quantitative recoveries from 81 to 120% and an adequate precision with relative standard deviations lower than 20%. Certified reference materials and natural samples were analyzed by the proposed hard cap espresso extraction and results were compared with those provided by a reference procedure based on pressurized solvent extraction, obtaining statistically comparable results. Therefore, the use of a hard cap espresso machine in tandem with SBSE and TD-GC-MS-MS allowed a simple, sensitive and quantitative determination of PCBs. [Display omitted] •Hard cap espresso machine for the quantitative extraction of PCBs in soils.•Preconcentration step by stir bar sorptive extraction provides LODs in the ppt range.•Extraction efficiency was compared with that of pressurized solvent extraction.•Trueness was evaluated by the analysis of a reference certified material.
ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2016.11.051