A method for monitoring and evaluating farm odor based on GC-IMS

Abstract

This invention relates to the field of ranch environmental monitoring and purification technology, and particularly to a method for monitoring and evaluating odors in livestock farms based on GC-IMS. The method includes: collecting odor samples for monitoring livestock farm odors; introducing each collected odor sample into a gas chromatography-ion mobility spectrometry (GC-IMS) instrument for measurement, generating a two-dimensional topological map of each sample; performing qualitative analysis on each volatile component based on the two-dimensional topological map of each sample to determine the substance name, and extracting monomer and dimer signals of each volatile component in each sample; when evaluating the treatment effect of air purification equipment, obtaining signal values ​​based on the monomer and dimer signals of the samples before and after treatment, and calculating the removal efficiency of each volatile component; when monitoring odor diffusion, generating fingerprint spectra based on the two-dimensional topological maps of different sampling points, judging the odor dissipation by color changes, and performing principal component analysis based on monomer and dimer signals to determine the odor diffusion range.

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