Advantages and Disadvantages

The technique is reasonably simple, and applicable to dilute samples, trace analysis and to volatile and involatile compounds; it is reasonably good for quantitative analysis. Because the sample can be transferred to the column over a longer period than is possible for split injection, the injector can be maintained at a lower temperature, rendering the technique more suitable for the analysis of thermally unstable compounds.

In addition to the usual disadvantages of vaporizing injection (e.g. discrimination), solvent condensation leads to several extra problems including peak distortion and peak splitting. These can be overcome by employing a 'retention gap' (an uncoated pre-column) and by using solvents that wet the stationary phase (rather than forming droplets) and in which all the sample components are highly soluble; the volume injected should be as low as possible. Solvent condensation can lead to damage of very polar stationary phases (which are less well immobilized). The solvent film can also result in variations in retention data, especially for different solvent volumes.

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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