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Extraction Technology
The technical challenge is formidable in extracting substances for analysis from
diverse, complex, and often inhomogeneous matrix materials. But the techniques
employed, such as manual solvent extraction, are often underdeveloped,
under-controlled, and wasteful of analytical time and reagents. Methods are chosen
because they can be pressed into practice immediately, rather than because they do
the job well. This leads to large uncertainties in analyte recovery - and, if the
extraction fails, the whole analysis will fail. It is not surprising, therefore,
that publication rates are now reflecting a greater interest in improved extraction.
LGC has responded with a new extraction facility, which is being commissioned in
summer 2001. This will evaluate and promote state-of-the-art automated instrumental
extraction. At the same time, it will generate data under the tightly controlled
conditions needed to study the mechanisms of particular extraction processes, and to
propose and implement improvements to them. And there will be a drive to speed up
the processing of extraction results, for instance with chemometric techniques, to
enable better through-automation with separation and measurement systems such as
GC-MS. The extraction facility includes:
- accelerated solvent extraction (ASE)
- supercritical fluid extraction with enhanced solvent extraction (SFE/ESE)
- microwave assisted extraction (MAE)
- flexible interfacing, e.g. accelerated solvent extraction-automated solid phase extraction (ASE-SPE)
- refinement of established 'blunt instrument' techniques such as Soxhlet extraction and sonication by gaining greater control over the exact conditions used
- a wealth of expertise in the traditional manual methods available for comparative studies.
Previous clients have provided us with diverse expertise in high throughput
instrumental extraction techniques, and we would now like to open up the whole
facility to new customers for applications research and method development studies.
Back to Research and Development
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