Elucidating metal ion-regulated flavour formation mechanism in the aging process of Chinese distilled spirits (Baijiu) by electrochemistry, ICP-MS/OES, and UPLC-Q-Orbitrap-MS/MS

Abstract

Elucidating the organometallic interactions in Baijiu will promote a deeper understanding of the flavour formation mechanism during Baijiu aging. However, the organometallic interactions during aging is difficult to explore because...

Electrochemical esterification in distilled liquor via gold catalysis and its application for enhancing ester aroma of low-alcohol liquor

“…In our previous study, the impact of electrochemistry on the overall properties of liquor was confirmed ( Xiong et al, 2020 ; Zheng et al, 2021 ). Therefore, we further examined the influence of the electrochemical treatment on the interconversion relationship between those components and the overall aroma of liquor.…”

Correlation between the redox activity of Polygonum multiflorum extract and its extraction technology with Chinese liquor (Baijiu): An electrochemistry-based study

“…In addition, literatures reported that flavonoids act as highly active antioxidants by way of metal chelation [ 36 ]. Thus the concentrations of the metals in Baijiu were determined by ICP-MS/OES analysis [ 44 ]. It is found that eight metals (Al, Ba, Ca, Cu, Fe, Mg, K, and Na) have a relatively high content.…”

Synergy of physicochemical reactions occurred during aging for harmonizing and improving flavor

“…The aging of Baijiu is a complicated and dynamic process, and is the result of various physical and chemical reactions. The aging mechanisms generally cover volatilization of irritant components with low boiling point; hydrogen bond association between alcohol and water; oxidation, esterification and hydrolysis among alcohols, aldehydes, acids and esters ( Ma et al, 2019 , Zheng et al, 2021a , Deng et al, 2020 ). In this part, more scientific molecular mechanisms of different traditional aging methods and artificial aging technologies will be clarified clearly based on the present research to promote comprehensive understanding of Baijiu aging process and development of novel artificial aging technology of Baijiu.…”

“…Cyclic and square wave voltammetry confirmed that Baijiu system include both combination and free state of metal ions. During the aging period, the concentration of total metal ions and organic acids showed an upward trend and significant organometallic interactions performed between them ( Zheng et al, 2021a ). The increase of organic acids facilitated the transformation of metal ions from complex to free state ( Fig.…”