Multidimensional Concepts

The multidimensional approach to solute separation involves the use of more than one column (almost always two columns) arranged in series, such that chosen components in a chromatogram, or selected sections of a chromatogram, are subjected to separation on each of the columns in the system.

Multidimensional methods may include interfacing of a chromatographic column with a multichannel detection system (mass spectrometry, atomic emission, Fourier transform infrared (FTIR), diode array detection and the like). This review will not extend into this area, focusing rather on multidimension gas chromatography (GC) separations. Within coupled separations, especially online and automated systems, simplification of the total sample analysis by incorporation of extraction steps such as solid-phase extraction, solid-phase microextraction, supercritical fluid extraction and other sampling approaches, combined with chromatographic separation, can be considered multidimensional analysis. These will also not be included here, and details on these methods should be sought elsewhere.

ing throughout the world is limited to about 100, although the potential of the technique is much greater. The future is likely to see the development of some new very large scale applications.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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