Voltammetric techniques applied on organic compounds. Applications to some compounds related to agroalimentary and health systems

MARÍA ALICIA ZÓN; NELIO ROBERTO VETTORAZZI; MARCELA BEATRIZ MORESSI; PATRICIA GABRIELA MOLINA; ADRIÁN MARCELO GRANERO; FERNANDO JAVIER ARÉVALO; SEBASTIÁN NOEL ROBLEDO; HÉCTOR FERNÁNDEZ

Voltammetry: Theory, Types and Applications.

Nova Science Publishers, Inc.

Lugar: New York; Año: 2014; p. 85 - 108

Electrochemical (voltammetric) techniques have been used since many years ago to study the thermodynamics and kinetics of heterogeneous reactions involving organic compounds. In addition, the advent of new voltammetric techniques has encouraged the development of electroanalytical methods for the determination of analytes in a wide range of concentrations (up to traces) in real samples from different areas of great importance for human being and animal?s health. Studies aimed to covering these areas have been conducted in our laboratory for some time. Mycotoxins, synthetic and natural antioxidants, and steroids hormones have been the subject of our studies for the determination of electrochemical properties and the development of methods for their quantification. Voltammetry, in a general sense, has been used for that purpose. Usually, linear and/or cyclic, convolution and square wave voltammetries, controlled potential electrolysis as well as digital simulation were used for several kinetics schemes of reactions. On the other hand, those organic compounds which are surface active were investigated at micro or nanomolar concentration levels by stripping voltammetry combined with adsorptive accumulation on naked and modified electrode surfaces. It is well known the growing demand for lower detection limits of substrates, particularly those related to toxins in foods and hormones in sera. Therefore, voltammetric techniques coupled to pre-concentration adsorptive steps have been developed and look very promising for the quantification of these substrates in real samples.