View in EDS

Dielectric barrier discharge (DBD) plasma induced flavonoid degradation kinetics and mechanism in water.

Saved in:
Bibliographic Details
Title: Dielectric barrier discharge (DBD) plasma induced flavonoid degradation kinetics and mechanism in water.
Authors: Khan, Muhammad Saiful Islam1 (AUTHOR), Kim, Yun-Ji1,2 (AUTHOR) yunji@kfri.re.kr
Source: LWT - Food Science & Technology. Jan2020, Vol. 118, pN.PAG-N.PAG. 1p.
Subjects: Flavonoids, Ions, Quercetin, Chemical kinetics, Dielectrics, Myricetin
Abstract: In this work, we evaluated the degradation mechanism of standard flavonoids when treated with dielectric barrier discharge (DBD) plasma in water. Five different standard flavonoids were chosen for analysis, including apigenin, myricetin, kaempferol, rutin, and quercetin. All flavonoids were treated for 5 min, and the samples were collected at different time intervals. The degradation kinetics of DBD plasma-treated samples were analyzed using HPLC, which follows first-order reaction kinetics. Various degradation peaks were observed in the HPLC chromatogram that started appearing within 10 s of DBD plasma treatment and increased until 60 s–90 s, subsequently degraded completely within 5 min of plasma treatment. LC-MS analysis was performed for the quercetin fragments obtained at 7.54 min. Based on the obtained major molecular ion peak at m/z 152.98 And 196.96; a quercetin degradation mechanism is suggested. The effect of two different feed gases (clean dry air and N 2) on flavonoid degradation was also evaluated. • Five different flavonoid standards in solution were treated using DBD plasma. • The degradation of flavonoids follows first-order kinetics. • An improved biologically active fragment was confirmed using LC-MS. • A possible fragmentation mechanism for quercetin degradation was proposed. [ABSTRACT FROM AUTHOR]
Copyright of LWT - Food Science & Technology is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:In this work, we evaluated the degradation mechanism of standard flavonoids when treated with dielectric barrier discharge (DBD) plasma in water. Five different standard flavonoids were chosen for analysis, including apigenin, myricetin, kaempferol, rutin, and quercetin. All flavonoids were treated for 5 min, and the samples were collected at different time intervals. The degradation kinetics of DBD plasma-treated samples were analyzed using HPLC, which follows first-order reaction kinetics. Various degradation peaks were observed in the HPLC chromatogram that started appearing within 10 s of DBD plasma treatment and increased until 60 s–90 s, subsequently degraded completely within 5 min of plasma treatment. LC-MS analysis was performed for the quercetin fragments obtained at 7.54 min. Based on the obtained major molecular ion peak at m/z 152.98 And 196.96; a quercetin degradation mechanism is suggested. The effect of two different feed gases (clean dry air and N 2) on flavonoid degradation was also evaluated. • Five different flavonoid standards in solution were treated using DBD plasma. • The degradation of flavonoids follows first-order kinetics. • An improved biologically active fragment was confirmed using LC-MS. • A possible fragmentation mechanism for quercetin degradation was proposed. [ABSTRACT FROM AUTHOR]
ISSN:00236438
DOI:10.1016/j.lwt.2019.108777