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A sensitive quantification of decabrominated diphenyl ether (deca-BDE) was achieved by optimizing the injection temperature, pressure and column system with gas chromatography mass spectrometry in selected ion monitoring mode. A simple one-step cleanup method with acid silica gel column chromatography showed the optimum efficiency and minimum matrix interference. Ultrasonic-assisted extraction with toluene provided the best performance (111%, 1 h) as compared to Soxhlet extraction (110%, 5 h)doi:10.2116/analsci.25.523 pmid:19359793 fatcat:bi5fc6nx7jcqjksq5qddej2ope