Abstract
Odour pollution has gained increasing relevance, prompting the development of technical standards to harmonize measurement methodologies. While dynamic olfactometry remains the regulatory reference, recent advances enable the application of electronic noses for continuous environmental monitoring; however, calibration procedures are still often dependent on human sensory panels, with limitations in cost, repeatability, and operational feasibility. A collaborative activity between ENEA and Neotes S.r.l. was established to validate an electronic nose for direct field use through a standardized laboratory-based approach. The emerging IEEE SA P2520.1 protocol introduces a training and calibration methodology based on predefined chemical classes, allowing full instrumental standardization without the involvement of human assessors and within a broader framework aimed at harmonizing e-nose applications. Preliminary validation was conducted on a GC-IMS system using isobutene, isopropanol, and acetone under controlled environmental conditions. Differentiation, recognition, and quantification performance levels were assessed by varying concentrations and environmental parameters. The results demonstrate the applicability of the P2520.1 procedure to commercial devices and its capability to support reproducible odour classification. This approach represents a promising step toward internationally shared standards for instrumental olfactory measurement, supporting continuous monitoring and early detection of odour-related critical events.
