Only the sausages with no nitrate/ nitrite added showed a slight increase of lipid-derived volatiles, which would be attributed to the antioxidant role of these additives;
this effect would be more noticeable in sausages with longer ripening times. Similarly, Zanardi, Ghidini, Battaglia, and Chizzolini (2004) reported a higher degree of lipid oxidation in Mediterranean style sausages lacking nitrate and nitrite in the formula. These compounds, especially aliphatic saturated aldehydes such as hexanal, greatly contribute to the aroma of dry-fermented sausages