US EPA

2173031 

Journal Article 

Evaluation of rapid solid sample extraction using the microwave-assisted process (MAP(TM)) under closed-vessel conditions 

Li, K; Belanger, JMR; Llompart, MP; Turpin, RD; Singhvi, R; Pare, JRJ 

1997 

1 

Spectroscopy
ISSN: 0712-4813
EISSN: 1875-922X 

13 

1 

1-13 

English 

WOS:A1997WP54500002 

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The applicability of MAP extraction and subsequent GC/MS determination of mixtures of representative toxic substances including PAH, PCB, base-neutrals, chlorinated pesticides and substituted phenols was evaluated. Typical environmental matrices including sand, soil and air filters were spiked, extracted and analysed. Recoveries from these matrices were acceptable (>80 %); precision was generally in the 10% (RSD) range. The method was then validated using standard reference materials of marine sediments, harbour sediments and a creosote contaminated soil certified with PAH and PCB. Split samples were also obtained from a contract laboratory and the consensus results were used to evaluate recoveries of PAH and organochlorine pesticides. The potential problem of degradation of thermally labile pesticides was addressed by measuring degradation products of DDT and Endrin after MAP extraction. Spiked samples before and after the high temperature/high pressure extraction process did not result in additional decomposition products.