2019
DOI: 10.21930/rcta.vol21_num1_art:951
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Espectroscopia de impedancia eléctrica aplicada al control de la calidad en la industria alimentaria

Abstract: La espectroscopia de impedancia eléctrica (EIE) es una técnica que permite analizar las propiedades eléctricas de materiales, incluso biológicos, al inducir señales eléctricas alternas a diferentes frecuencias y medir las señales de respuesta. Se ha utilizado para determinar la madurez en frutos, identificar adulteraciones en productos cárnicos y lácteos, determinar propiedades físico-químicas en todo tipo de matrices alimentarias e incluso para cuantificar microorganismos presentes en alimentos y en superfici… Show more

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Cited by 7 publications
(11 citation statements)
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References 68 publications
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“…As shown by Leo et al, this structure is not unique, as a similar layout was previously used for biosensors and environmental sensor applications. In another study, focused on milk analysis, two stainless steel rods have been used to create a “3D” sensing structure, spaced 10 mm from each other and submerged to a depth of 20 mm. Smaller “3D” electrodes, needle like, have been proposed by other research teams. , Similar structures have also been presented in the literature, along with variations for electrode materials, such as gold or platinum, with or without thin polymer coatings, to improve the capacitive sensing capabilities of the sensor and reduce the magnitude of faradaic current flowing through the sensor …”
Section: Resultsmentioning
confidence: 99%
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“…As shown by Leo et al, this structure is not unique, as a similar layout was previously used for biosensors and environmental sensor applications. In another study, focused on milk analysis, two stainless steel rods have been used to create a “3D” sensing structure, spaced 10 mm from each other and submerged to a depth of 20 mm. Smaller “3D” electrodes, needle like, have been proposed by other research teams. , Similar structures have also been presented in the literature, along with variations for electrode materials, such as gold or platinum, with or without thin polymer coatings, to improve the capacitive sensing capabilities of the sensor and reduce the magnitude of faradaic current flowing through the sensor …”
Section: Resultsmentioning
confidence: 99%
“…26,27 Similar structures have also been presented in the literature, along with variations for electrode materials, such as gold or platinum, with or without thin polymer coatings, to improve the capacitive sensing capabilities of the sensor and reduce the magnitude of faradaic current flowing through the sensor. 2 Based on the impact of number of electrodes and inspired by the various sensor and electrode designs found in the literature, our research group has designed four new EIS sensors (represented in Figure 4), with different sizes and shapes. All the EIS sensors present four-electrode configurations: two excitation (drive) electrodes and two sensing electrodes.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
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“…The greatest growth has been recorded in non-destructive methods for evaluating or controlling fruit quality parameters, including internal errors, but also taste, sugar content, etc. [26,75,76]. Further studies have examined the usefulness of using the dielectric properties of apples to detect changes in their quality during storage [77].…”
Section: Electrical Properties Utilizationmentioning
confidence: 99%
“…A partir de una pequeña descarga de corriente aplicada a la muestra se logra medir mediante un equipo EIE la respuesta eléctrica ejercida por el material biológico, la cual es plasmada en los espectros de impedancia característicos (Bode y Nyquist). Esta técnica es totalmente conable y fue aplicada en estudios de tejidos vegetales [2], adiposos [3], musculares [4] y sanguíneos [5].…”
Section: Introductionunclassified