Effects of roasting and deodorisation on 3-monochloropropane-1, 2-diol esters, 3, 4-benzopyrene and trans fatty acids in peanut oil

ABSTRACT

Hazardous substances are readily produced during roasting and deodorisation in the preparation of peanut oil. The aim of this work was to investigate the variation of 3-monochloropropane-1, 2-diol ester (3-MCPDE), 3, 4-benzopyrene (BaP) and trans fatty acid (TFA) contents in the roasting and deodorisation segments of peanut oil production process. Roasting temperatures and durations significantly affected the contaminants contents in peanut oil; they increased significantly at a roasting temperature >210°C and time >60 min. In the deodorisation segment, the BaP and TFA contents were over the standard limits at a deodorisation temperature >210°C and time >140 min. Analysis showed that 3-MCPDE was significantly correlated with the formation of C18:2T (r = 0.979) and there was a linear relationship between BaP and C18:1T (Y = 0.509 C18:1T). This information will provide guidance for the precise and appropriate processing of peanut oil.

KEYWORDS:

• Peanut oil
• trans fatty acids
• 3-monochloropropane-1
• 2-diol ester
• 3, 4-benzopyrene
• roasting
• deodorisation

Acknowledgments

The authors thank for Key Laboratory of Ministry of Education in Wuhan Polytechnic University financial support for this research project.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Authors’ contributions

Pan Gao: Conceptualization, Resources, Writing-Original Draft; Yuling Zheng: Writing-Original Draft; Hui Liu: Writing-Original Draft; Wei Yang: Formal analysis, Investigation; Chuanrong Hu: Resources, Writing - Review & Editing, Supervision; Dongping He: Resources, Writing - Review & Editing, Supervision.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China Youth Science Foundation Project under Grant [32001735] and the project of Key Laboratory of Ministry of Education in Wuhan Polytechnic University under Grant [DZLY202101].