The effects of soybean storage under controlled atmosphere at different temperatures on lipid oxidation and volatile compounds profile

• Published in: Food research international 2021-09, Vol.147, p.110483-110483, Article 110483
• Main Authors: Ludwig, Vagner, Berghetti, Magno Roberto Pasquetti, Ribeiro, Stephanie Reis, Rossato, Fabiane Portella, Wendt, Lucas Mallmann, Thewes, Fabio Rodrigo, Thewes, Flavio Roberto, Brackmann, Auri, Both, Vanderlei, Wagner, Roger
• Format: Article
• Language: English
• Subjects: (E)-2-Hexenal and hexanal; Atmosphere; Glycine max; Glycine max L. Merrill; Hermetic storage. Long-term storage; Lipids; Oxidation-Reduction; Temperature
• ISSN: 0963-9969; 1873-7145
• DOI: 10.1016/j.foodres.2021.110483

[Display omitted] •Controlled atmosphere storage allows to maintain the soybean oil quality at 20, 25 and 30 °C.;•Reducing O2 partial pressure to 1 and/or 2 kPa keep lower acidity and peroxide value from soybean oil.•(E)-2-hexenal and hexanal are potential lipid deterioration markers;•Hermetic system is a promising tool for soybean storage; This study aimed to evaluate the effects of low oxygen partial pressure (pO2) and high carbon dioxide partial pressure (pCO2) combined with different temperatures on the oil acidity and peroxide values of two soybean cultivars (NA 5909 RG and FEPAGRO 37 RR). The volatile compounds correlated to lipid oxidation were also evaluated. Soybeans were stored for seven months under ambient and controlled atmosphere (CA) conditions at three temperatures (20, 25, and 30 °C). Storage under ambient conditions increased acidity and peroxide value regardless of the temperature. CA storage with low pO2 reduced oil acidity and its combination with high pCO2 had no positive effects on oil acidity and peroxide values. Grains of FEPAGRO 37 RR stored under ambient air showed higher 1-octne-3-ol amount compared to CA. The higher storage temperature increased (E)-2-heptenal and decanal amount in grains of cultivar NA 5909 RG. In addition, the ambiente air storage provide higher γ-Butyrolactone in relation to CA storage. Moreover, in both cultivars the CA storage technique provides lower (E)-2-hexenal content. This compound, together with hexanal are potential lipid deterioration markers of soybeans. CA storage is a promising tool for soybean grains preservation and the effect is mainly due to the oxygen reduction, with no additional effect of CO2 increasing.