Milestone microwave extraction system for GC and HPLC analysis

Samples submitted for GC and HPLC analysis require pre-treatment. The fundamental step in sample pretreatment is the extraction of the compounds of interest from the sample matrix. This is the least evolved -many people still use the Soxhlet method invented in 1879-, most error-prone step in the overall analytical procedure.

The use of microwave energy to accelerate solvent extraction procedures was first described by Ganzler et al. in 1984. These researchers used polar, microwave absorbing solvents or mixtures to extract crude fat from food and pesticides from soil matrices. Microwave extraction rates were found to be significantly faster, with recoveries comparable or superior to traditional Soxhlet extraction, and with a substantial reduction of the amount of solvent required.

The new Milestone ETHOS X is an advanced microwave extraction system offering the best technology currently available for GC, GC-MS and HPLC sample preparation.


  • High sample throughput
  • Low running cost
  • Reproducibility of extraction
  • Simplicity compared to conventional techniques

Environmental sample extraction – going greener

Microwave green extraction bookInstrumental analysis has continually evolved to keep up with the demands of the analyst but sample preparation has failed to keep up with the evolution of modern trace organic analysis instrumentation.

The book discusses the importance of sample preparation for trace organic analysis.

Part 1 focuses on the fundamental theory of extracting an analyte from a sample matrix, modern extraction techniques, and post extraction processing. Part 2 reviews modern instrumental analysis techniques (LC, GC, and GCMS) including theory and how they relate to the sample preparation process. Part 3 discusses how advances in microwave technology bring sample preparation to the same standards as instrumental techniques.

Request a copy here

User Interface

Microwave extraction control terminalThe ETHOS X is controlled via new compact terminals with an easy-to-read, bright, full-colour, touchscreen display. The terminals run a completely new user-friendly, icon-driven, multi-language software to provide easy control of the microwave run. US EPA methods are already preloaded, simply recall a stored method or create a new one, press ‘START’ and the system will automatically follow the user defined temperature utilising a sophisticated PID algorithm. There is no need to input the number of samples or weights being extracted, as the software will automatically regulate the microwave power accordingly. This assures a consistent quality of extraction and simplifies the use of the instrument.

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