简介:Low concentration method - A 30-g sample is mixed with anhydrous sodium sulfate to
form a free-flowing powder. This is solvent extracted three times using ultrasonic extraction. The
extract is separated from the sample简介:Low concentration method - A 30-g sample is mixed with anhydrous sodium sulfate to
form a free-flowing powder. This is solvent extracted three times using ultrasonic extraction. The
extract is separated from the sample by vacuum filtration or centrifugation. The extract is ready for
cleanup and/or analysis following concentration.详细>