In a typical MASE procedure, 1 g
rice powder mixed with certain quartz sands was transferred to
an extraction vessel (polyethylene, 30 mm long; i.d. 15 mm), and
then 500 lL methanol was added. The extraction vessel was settled
in the microwave oven. Water steam, which was also generated by
microwave heating, flowed through the extraction vessel. The extract
containing the target compounds was condensed in the collection
tube. Afterwards the condensed extract was submitted to
SPE section for clean-up and concentration.