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Gewählte Publikation:

Szolar, OH; Rost, H; Braun, R; Loibner, AP.
(2002): Analysis of polycyclic aromatic hydrocarbons in soil: minimizing sample pretreatment using automated Soxhlet with ethyl acetate as extraction solvent.
Anal Chem. 2002; 74(10):2379-2385 FullText FullText_BOKU

Abstract:
A simplified sample pretreatment method for industrially PAH-contaminated soils applying automated Soxhlet (Soxtherm) with ethyl acetate as extraction solvent is presented. Laborious pretreatment steps such as drying of samples, cleanup of crude extracts, and solvent exchange were allowed to be bypassed without notable performance impact. Moisture of the soil samples did not significantly influence recoveries of PAHs at a wide range of water content for the newly developed method. However, the opposite was true for the standard procedure using the more apolar 1:1 (v/v) n-hexane/acetone solvent mixture including postextraction treatments recommended by the U.S. EPA. Moreover, ethyl acetate crude extracts did not appreciably effect the chromatographic performance (HPLC-(FLD)-F-3D), which was confirmed by a comparison of the purity of PAH spectra from both pretreatment methods. Up to 20% (v/v) in acetonitrile, ethyl acetate proved to be fully compatible with the mobile phase of the HPLC whereas the same concentration of n-hexane/acetone in acetonitrile resulted in significant retention time shifts. The newly developed pretreatment method was applied to three historically contaminated soils from different sources with extraction efficiencies not being significantly different compared to the standard procedure. Finally, the certified reference soil CRM 524 was subjected to the simplified procedure resulting in quantitative recoveries (>92%) for all PAHs analyzed.
Autor/innen der BOKU Wien:
Braun Rudolf
Loibner Andreas Paul
BOKU Gendermonitor:

Find related publications in this database (using NML MeSH Indexing)
Acetates -
Environmental Monitoring - instrumentation
Industrial Waste - analysis
Polycyclic Hydrocarbons, Aromatic - analysis
Reference Standards - analysis
Soil Pollutants - analysis
Solvents - analysis



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