Selectivity

The very large selectivity range of packed column analytical GC is also available for preparative GC since the same stationary phases are used. The selectivity is based not only on the difference of volatility of the compounds (as in traditional distillation) but also on their relative affinity for the stationary phase. Thus, the choice of the stationary phase is a powerful tool to customize the separation (e.g. an impurity can be removed from a complex mixture without separating the other compounds).

Another advantage of preparative GC over distillation is the possibility of purifying azeotropic mixtures.

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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