Since the middle of last century, the use of organic synthetic pesticides became a
widespread practice, in order to better prevent, control and destroy pests. Despite their
usefulness in the increment of food production, the extensive use of pesticides during
production, processing, storage, transport or marketing of agricultural commodities can led
to environmental contamination and to the presence of residues in food.
Gas chromatography has been and it still is, one of the key tools in analytical
techniques in many of the advanced research carried out over the globe. This
technique has contributed tremendously and was once the main technique in the
analysis of specific compounds like volatile compounds, certain pesticides,
pharmaceuticals and petroleum products. The advance of this technique has resulted
in several tandem instruments with application of other techniques to enhance the
results obtained by gas chromatography.