There are many definitions that have been given about Analytical Chemistry. All, however, agree on the fundamental importance of this discipline in the development of our society. One of the consequences of this development that has generated most concern over the last decades is the degradation of the environment and the parallel increase in pollution. Scientific and technical disciplines, such as Analytical Chemistry, can help, to a large extent, the correct management of this limited resource. On the other hand, the Analytical Chemistry also has a relevant role in the field of chemical and pharmaceutical industries and in the control of food.