**4. Conclusion**

Dyes are widely used for industrial, printing, food, cosmetic and clinical purposes as well as in analytical chemistry. They play an important role in spectrophometry and electrochemistry analysis as complexing reagent for the detection of metal ions but they potential is still underestimated in electroanalysis.

It is well known that thousands tons of synthesis dyes are annually produced worldwide. Despite considerable work in recent years on the synthesis of new dyes which can be used reagent for the determination of trace amounts metals, the use of dye as modifying agents is still limited in electroanalysis. Further investigations are

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**Author details**

Mariame Coulibaly

mamecoul2002@yahoo.fr

provided the original work is properly cited.

Ecole Normale Superieure d'Abidjan, Abidjan, Côte d'Ivoire

and their application to the detection of metal ions, etc.

\*Address all correspondence to: coulibaly.mariame@ensabj.ci;

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

*Applications of Metal Complexes Dyes in Analytical Chemistry*

for electrochemical determination of metal ions.

required to synthesis dyes in function of metal and use them to modified electrodes

The ill effects of metals on health and the environment are well documented, yet there is a lack of reliable, robust, cheap, and accurate sensors for monitoring toxics metals level in environment. Although much progress has been achieved in the last few decades in the field of chemically modified electrodes, techniques developed so far in electroanalysis have used very little the properties of dyes. This signifying that more research and development of new electrodes or new metal complexes for spectrophotometric analysis are required. The inconvenients of current sensors concern largely on their reproductibilty, sensitivity and their selectivity toward target metal. The cost associated with portable nature and speciation analysis are

Thus there is an urgent need to synthesis new dyes in function of target metal for the application to the electroanalysis of metal cation and in spectrophotometric analysis. Several investigations can therefore be carried out: synthesis of new dye as ligand for metal complexation; study of physicochemical characteristics of new synthesis ligands; study of their electrochemical behavior and complexation; characterization of metal dyes complexes for the electro and spectro analysis; polymerization of dye; thermodynamic study of the complexation of metal cations in poly-dye/poly film dye; study of chemically modified electrodes (ECM) by dye

*DOI: http://dx.doi.org/10.5772/intechopen.95304*

**5. Future outlook**

also a limiting factor.

required to synthesis dyes in function of metal and use them to modified electrodes for electrochemical determination of metal ions.
