Electrochemical Studies of Ochratoxin A Mycotoxin at Gold Electrodes Modified with Cysteamine Self‐Assembled Monolayers. Its Ultrasensitive Quantification in Red Wine Samples |
| |
| Authors: | Patricio René Perrotta Nelio Roberto Vettorazzi Fernando Javier Arévalo Adrián Marcelo Granero Sofía Noemí Chulze María Alicia Zón Héctor Fernández |
| |
| Affiliation: | 1. Departamento de Química, Facultad de Ciencias Exactas, Físico‐Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N°?3 (5800) – Río Cuarto, Argentina, Phone: 00‐54‐358‐467?6440;2. Fax: 00‐54‐358‐467?6233;3. Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Físico‐Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N°?3 (5800) – Río Cuarto, Argentina |
| |
| Abstract: | The quantification of ochratoxin A is studied at cysteamine self‐assembled monolayer modified gold electrodes in red wine samples by square wave voltammetry. Detection and quantification limits of 0.004 µg L?1 and 0.012 µg L?1, respectively, were determined. The recovery percentages were in the range from 146 % to 94.0 % at spiking levels ranging from 0.02 to 5 µg L?1. The variation coefficients for within‐laboratory repeatability varied from 31.4 to 11.5 % for spiked level from 0.02 to 2.0 µg L?1. The developed electrochemical method is efficient, reproducible, and ultrasensitive for the quantification of OTA in red wine samples. |
| |
| Keywords: | Cyclic voltammetry Ochratoxin A Self‐assembled monolayer Square wave voltammetry Sub‐ppb electroanalysis |
|
|
