Volatile organic compounds (VOCs) include a wide range of molecules (e.g., carboxylic acids, terpenes, alcohols, etc.) characterized by a low boiling point. Most of them are released by plants in response to biotic and abiotic stresses as a defense system from pathogens and in promoting growth and crops (e.g., photosynthesis, nutrient metabolism). VOC analysis can be a useful tool for retrieving health status information, promoting sustainable agriculture. Hereafter, the development of a VOC sensor, for the monitoring of VOCs emitted by plants is presented. To improve the selectivity of commercial detector, a nanoporous adsorbing layer of zeolite layer was combined with commercial photoionization device (PID). VOC emission analysis was conducted on samples of propionic and succinic acids at different concentration using by a temperature-controlled desorption process. VOCs are detected and quantified by evaluating emission profiles considering an evaporation/diffusion model. Results showed that the proposed approach can improve the selective of a commercial PID taking advantage of short time analysis and low volumes liquid samples.

Development of a Sensor Based on a Thin Layer of Zeolite to Monitor Plant Health Through VOC Analysis

OLIVA G.
;
A. S. Fiorillo;LAGANA' F.;S. A. Pullano
2025-01-01

Abstract

Volatile organic compounds (VOCs) include a wide range of molecules (e.g., carboxylic acids, terpenes, alcohols, etc.) characterized by a low boiling point. Most of them are released by plants in response to biotic and abiotic stresses as a defense system from pathogens and in promoting growth and crops (e.g., photosynthesis, nutrient metabolism). VOC analysis can be a useful tool for retrieving health status information, promoting sustainable agriculture. Hereafter, the development of a VOC sensor, for the monitoring of VOCs emitted by plants is presented. To improve the selectivity of commercial detector, a nanoporous adsorbing layer of zeolite layer was combined with commercial photoionization device (PID). VOC emission analysis was conducted on samples of propionic and succinic acids at different concentration using by a temperature-controlled desorption process. VOCs are detected and quantified by evaluating emission profiles considering an evaporation/diffusion model. Results showed that the proposed approach can improve the selective of a commercial PID taking advantage of short time analysis and low volumes liquid samples.
2025
978-3-031-82076-2
photoionization; sensor; VOCs analysis; zeolite
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12317/105001
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