Related Experiment Video
Updated: May 13, 2026

Therapeutic Effectiveness of a Dietary Supplement for Management of Halitosis in Dogs
Published on: July 6, 2015
Volatile compounds in dry dog foods and their influence on sensory aromatic profile
Kadri Koppel1, Koushik Adhikari, Brizio Di Donfrancesco
1The Sensory Analysis Center, Department of Human Nutrition, Justin Hall, Kansas State University, Manhattan, KS 66506-1407, USA. kadri@ksu.edu
Abstract:
The aim of this study was to determine volatile compounds in dry dog foods and their possible influence on sensory aromatic profile. Grain-free dry dog foods were compared to dry dog foods manufactured with grain, but also with different protein sources for their aromatic volatiles. Solid-phase microextraction/gas chromatography/mass spectrometry was used to determine the aromatic compounds present in the headspace of these samples. Partial Least Squares regression was performed to correlate the instrumental aromatic data with the descriptive aroma analysis data. A total of 54 aromatic compounds were tentatively identified in the dry dog food samples, with aldehydes and ketones being the most represented organic volatiles group. Grain-added products were on the average higher in total volatiles than grain-free products. Partial Least Squares regression analysis indicated possible connections with sensory aromatic profile and grain-added samples, such as rancid aroma and aldehydes, especially hexanal. The results of this study showed that dry dog foods are products with complex odor characteristics and that grain-free products are less aromatic.
Related Concept Videos
Aromatic Compounds: Overview
In 1825, Faraday isolated benzene...
NMR Spectroscopy of Aromatic Compounds
Olfaction
The olfactory receptors are embedded in the cilia of the...
Mass Spectrometry: Aromatic Compound Fragmentation
Gustation
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds

