Galloping GC: Multiple injections with MISER system
Author: Steve Down
Channels: Gas Chromatography
Speeding up GC analyses
The pressure placed on analytical labs around the world is increasing with demands for higher throughput in order to reduce the unit cost per analysis. New instrumentation that allows automation and minimises operator involvement is being introduced regularly, as well as the design of better components. For gas chromatography, more refined furnace temperature control, shorter columns and improved data systems have all made an impact in recent years.
A further area of interest in GC is the injection system. Accelerated injection, multiplexed injectors and continuous injection have all contributed to offer more rapid analyses. Now a team of scientists from Brazil have adapted another system which has been reported for techniques like capillary electrophoresis and liquid chromatography/mass spectrometry. The system they adopted was named multiple injection in a single experimental run, which produces the catchy acronym MISER.
Gustavo Amadeu Micke and coresearchers from the Federal University of Santa Catarina, Florianopolis, and EPAGRI, Itajai, demonstrated the use of MISER in an effort to increase experimental throughput. They demonstrated their system with the analysis of the triterpenes friedelin and friedelan-3-ol in a leaf extract of the Brazilian medicinal plant Maytenus ilicifolia, which is used for the treatment of gastric ulcers
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