Green chemistry (also named as clean chemistry or environmentally
benign chemistry) has as objective to develop
chemical processes that minimize or eliminate the use of toxic
substances and the generation of toxic wastes in the prevention
of environmental pollution and human hazards [1]. Researches
in this field have focused mainly on the development
of new synthetic rotes and the replacement or minimization
of the use of organic solvents. However, there is an evident
demand to the development of greener, yet reliable, analytical
procedures, because several current analytical methods
employ highly toxic reagents, resulting themselves in a potentially
negative environmental impact. For developing a new
analytical procedure, the amount and toxicity of the wastes
generated are as important as any other analytical feature.