Real-Time Flavor Analysis with PTR-MS

Using PTR-MS to analyze plant-based and meat-based sausages

A taste of science: Insights into food and flavor science in real-time

Food and flavor analysis is one of the fields which can be extremely enhanced by the use of Proton-Transfer-Reaction – Mass Spectrometry (PTR-MS). To showcase the advantages and capabilities of PTR-MS, the IONICON Applied Science Team conducted a demonstration in our lab using randomly selected food products. Plant-based and meat-based sausages were the chosen subjects. Using PTR-MS, the researchers explored the complex chemistry of these products, revealing differences in their aromatic and chemical profiles – highlighting the potential of this technology for broader food and flavor analysis applications.

Unveiling key insights through PTR-MS

The analysis began with visual, olfactory and taste assessments of the sausages, followed by real-time chemical profiling during cooking. PTR-MS allowed the detection and quantification of trace compounds with remarkable precision.

For plant-based sausages during cooking the flavor profile was dominated by compounds such as acetic acid and enhanced with artificial smoke aromas to mimic meaty characteristics. Key compounds, including xylenol, guaiacol, methylguaiacol and eugenol, were identified, highlighting their role in achieving the desired flavors.

In contrast, meat-based sausages during cooking exhibited a distinct profile, featuring naturally occurring hydrogen sulfide (H₂S) and other volatile compounds that contribute to their characteristic flavor.

Fig. 1: The selected samples showed compounds such as xylenol, guaiacol, methylguaiacol and eugenol, which contribute to a smoky flavor and are primarily detected in plant-based sausages.

Why PTR-MS Stands Out

Traditional analytical methods in food science often require extensive sample preparation and laborious workflows. PTR-MS offers a transformative alternative:

Direct Injection: Eliminates the need for sample preparation.
Real-Time Quantification: Enables immediate results, optimizing workflow efficiency.
Unmatched Sensitivity: Detects trace compounds even at very low concentrations.
High Resolution: Dissects complex samples with precision, distinguishing isobaric compounds.

The experiment underlines PTR-MS as an essential tool for modern food and flavor science, capable of quantifying hundreds of compounds with unparalleled accuracy.

Check out the video and explore further topics on Food & Flavor science.

Fig. 2: During cooking, hydrogen sulfide (H₂S) is emitted primarily by meat-based sausages, while plant-based products show only a low emission of H₂S.