Alkaline extraction in combination with microwave-assisted extraction followed by solid-phase extraction treatment for polycyclic aromatic hydrocarbons in a sediment sample

Perylene in Lake Biwa sediments originating from Cenococcum geophilum in its catchment area

“…Fluorescent particles too small to collect with micro-tweezers were flushed with cyclohexane and transferred to a back-deployed glass-fibre filter (only a few particles could be transferred due to the strong absorption on the mesh). The dried mesh-passed fraction and intact CRM7307-a were also used for perylene analysis; they were separately extracted using 30 mL of 1 M KOH/MeOH at 150°C for 30 min using a MarsX MAE (microwave-assisted extraction) system (CEM, Matthews, NC, USA) and were analysed with a GC/MS as reported previously (Itoh et al, 2008), but with some modifications. In summary, the extract was filtered using a glass-fibre filter and shaken with 30 mL of Milli-Q water and 10 mL of toluene in a 250 mL separatory funnel.…”

Scoring of solvents used in analytical laboratories by their toxicological and exposure hazards

“…1. The scheme showing the amount of solvents consumed during: A -pressurised liquid extraction-gas chromatography-mass spectrometric detection (Choi et al, 2014); B -microwave assisted extraction-solid phase extraction-gas chromatography-mass spectrometric analysis (Itoh et al, 2008); C -vortex assisted extraction followed by dispersive liquid-liquid microextraction and high performance liquid chromatography (Leng et al, 2012); D -ultrasound assisted extraction with high performance liquid chromatographic procedure (Peng et al, 2012), all for the determination of PAHs in sediment samples. …”

Organic Analysis for Urban Geochemical Survey Soil Samples

“…Methods for PAHs have been reported where acetone is employed as the soil extractant (Kootstra et al, 1995;Sun et al, 1998). Recently, a method for PAHs utilizing RP SPE, with cartridges containing a modified PSDVB, was published where a saponified (i.e., alkaline) soil extract had been used (Itoh et al, 2008). Unlike silica-based RP sorbents, PSDVB and its polymeric variants are stable to the passage of alkaline extracts.…”