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微波萃取——《Lab Manager》
閱讀：1699發(fā)布時(shí)間：2009-02-26
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Problem: Extracting compounds from various samples using tradition-al methods involves some give and
take. You can choose to use Soxhlet, which is relatively inexpensive for equipment but uses a tremendous
amount of solvent and takes hours to run. Sonication is fast, but it also requires copious amounts of solvent
and banks of individual sonicators （which also adds to the cost） if your lab handles more than a few samples
a day. Pressurized solvent extrac-tion uses much less solvent, but only processes six samples per hour and
the equipment is costly.
Solution: Microwave extraction has been used for many years to extract compounds from plastics, biological
samples, foods, animal feeds, paper, wastewater and many other types of samples. In early 2008, the U.S.
Environmental Protection Agency （USEPA） approved Method 3546 for microwave extraction of organic
compounds from soils, sludges and sediments. It is a proven technique that is fast, uses significantly less
sol-vent than traditional techniques and is cost-effective.
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