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CEM | Microwave Extraction




Technology

Traditionally, liquid/solid solvent extractions have involved either banks of solvent-hungry Soxhlets or slow, sequential pressurized systems that process 1 sample every 20 minutes. All of that changed with the introduction of microwave extraction, a proven method accepted by government agencies and professional organizations around the world. Microwave extraction decreases extraction times, reduces solvent consumption, improves extraction efficiency, and can help increase the productivity of your laboratory. Closed-vessel microwave extraction helps reduce solvent usage, aiding in the green chemistry initiatives that many laboratories have adopted. The CEM MARS™ 6 Microwave Reaction System can perform over 500 microwave extractions using the same amount of solvent normally consumed for only 32 Soxhlet extractions. Methods that involve non-polar solvents, which are microwave transparent, can be performed easily with CEM's Carboflon® stir bars without any change to a laboratory’s current extraction method.


FEATURED ARTICLES


Speciation Analysis of Mercury in Sediments by HPLC Using HPLC Hyphenated to Vapour Generation Atomic Fluorescence Spectrometry Following Microwave-Assisted Extraction By: Geng Leng, Li Feng, Shao-Bo Li, Ping Yang, De-Zhong Dan, LCGC EUROPE, Vol. 26(5), pp. 250-258.

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How It Works: Microwave Assisted Extraction, Jan 2009, Lab Manager

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OFFICIAL METHODS
USEPA
The US Environmental Protection Agency has approved microwave extraction methodology for extraction of PCB’s and PAH’s in soils and sediments. The tremendous reduction in solvent usage associated with the use of this methodology is leading to its rapid and widespread adoption.

Read Method 3546

Consumer Product Testing and Safety Methods

The Consumer Products Safety Commission published several test methods for children’s products that either mandate or allow the use of microwave sample preparation as part of the method. CPSC Extraction Test Method (Determination of Phthalates)

Basic sample preparation CPSC digestion test methods

Discover SPX

Discover SP-X

Automated Microwave Sample Preparation System for Organic Analysis The fast, easy alternative to Soxhlet, sonication, and other techniques. Significantly reduce solvent usage and decrease extraction times from hours to minutes with the new Discover SP-X, a remarkable, sequential platform for automated microwave extraction, hydrolysis, or derivatizations.

  • Reduce solvent usage by up to 95%
  • Typical extractions in 10 minutes or less, cool down time included
  • Full temperature & pressure control of each vessel
  • Easy-to-use 35 ml and 80 ml vessels with snap-on caps
  • Works with all solvents, including polar & non-polar
  • Accommodates a wide range of sample sizes
  • Documentation of every sample
  • Stirring provides uniformity of sample mixture
  • Compact
  • Optional automation deck available – load it and leave it, even overnight
  • Ideal for a wide variety of matrices including foods, plastics and polymers, environmental samples, textiles, and more


  • The cavity of the Discover SP-X is specifically designed to maintain the optimum amount of energy for the programmed reaction. Microwave energy raises the solvent temperature above the boiling point, allowing for higher extraction efficiencies. Samples are processed using programmed methods, ensuring uniformity of extraction times and conditions. Method programming is intuitive and the system features a library of pre-set methods.


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    Mars 6

    Mars 6 X


    Superior Performance and Reliable Results Fast.
    MARS 6 brings a remarkable speed and ease-of-use to solid-liquid extractions.

  • Shorter extraction times
  • Reduce solvent usage by 90%
  • Built-in applications library containing US EPA and other internationally recognized methods
  • IR temperature control NIST-traceable documentation of temperature for every vessel
  • Innovative Vessel Designs

  • CEM offers several popular vessel choices for extraction including the MARSXpress or MARSXpress Plus. Their simple 3-piece design makes these vessels remarkably easy-to-use. Other vessels are available, please contact CEM for more information on the vessel best-suited to your application.

    New:
    Disposable glass liners for the 110-mL MARSXpress Plus vessels make microwave extraction cleaner and even more convenient. Eliminate carry-over contamination from dirty vessels. Process up to 24 extractions simultaneously. Save time and money by eliminating vessel cleaning and reducing chemical consumption. As they allow sample sizes of up to 30 grams, CEM disposable glass liners are ideal for US EPA 3546 and other soil extractions.

    The 75-mL MARSXpress vessel
    is the perfect all-purpose vessel. As it allows for sample sizes of up to 30 grams to be extracted, it can be used for a number of different sample types. Up to 40 samples can be simultaneously processed to maximize your laboratory throughput.

    The 100-mL MARSXpress Plus
    has a TFM Teflon® liner, but is also available with either reusable or disposable glass liners. Up to 24 vessels may be run simultaneously.

    Perform up to 14 reactions simultaneously with CEM's Green Chem™ vessels. These 100-mL vessels are available with either PFA Teflon or glass liners.

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