• Home
  • Search Results
  • Microwave assisted extraction combined with solvent bar microextraction for one-step solvent-minimized extraction, cleanup and preconcentration of polycyclic aromatic hydrocarbons in soil samples.

Microwave assisted extraction combined with solvent bar microextraction for one-step solvent-minimized extraction, cleanup and preconcentration of polycyclic aromatic hydrocarbons in soil samples.

Journal of chromatography. A (2013-03-19)
Liang Guo, Hian Kee Lee
ABSTRACT

For the first time, a novel one-step sample preparation method that combines microwave assisted extraction and solvent bar microextraction (MAE-SBME) with analysis by gas chromatography-mass spectrometry (GC-MS), was developed for the fast and efficient determination of polycyclic aromatic hydrocarbons (PAHs) in environmental soil samples. An interesting feature of the new procedure is that SBME was conducted simultaneously with MAE. Thus, the extract from the SBME could be directly and immediately analyzed by GC-MS. A separate clean up and/or preconcentration process, such as time-consuming and tedious gel permeation chromatography, solid-phase extraction, filtration, or adsorption chromatography, normally associated with conventional MAE, was not necessary. It is also notable that the procedure was environmentally benign since water was used as the extraction solvent in MAE, and only several microliters of organic solvent were used in SBME. Some factors affecting the extraction were studied and optimized. Under the most favorable conditions, the method showed good linearities (between 0.2 and 500, 0.5 and 500, 1 and 500, and 2 and 500 ng/g, depending on the analytes), low limits of detection (from 0.03 to 0.25 ng/g), and satisfactory precision (with relative standard deviations below 9.8%). The MAE-SBME procedure provides a fast and simple sample preparation approach for the processing of environmental soil samples.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Toluene, anhydrous, 99.8%
Sigma-Aldrich
Toluene, ACS reagent, ≥99.5%
Sigma-Aldrich
Toluene, suitable for HPLC, 99.9%
Sigma-Aldrich
Toluene, HPLC Plus, for HPLC, GC, and residue analysis, ≥99.9%
Supelco
Toluene, analytical standard
Sigma-Aldrich
Toluene, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.7% (GC)
Supelco
Toluene, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
Toluene, ACS reagent, ≥99.5%
Sigma-Aldrich
Toluene, Laboratory Reagent, ≥99.3%
Supelco
Toluene solution, certified reference material, 5000 μg/mL in methanol
Sigma-Aldrich
Toluene, suitable for HPLC, ≥99.9%
Sigma-Aldrich
Toluene, ACS reagent, ≥99.5%
Supelco
Toluene, HPLC grade, 99.8%