Prediction of Antioxidant Capacity of Thai Vegetable Extracts by Infrared Spectroscopy

Authors
Prommajak, TrakulKim, Sang MooPan, Cheol-HoKim, Sang MinSurawang, SuthatRattanapanone, Nithiya
Issue Date
2015-07
Publisher
CHIANG MAI UNIV
Citation
CHIANG MAI JOURNAL OF SCIENCE, v.42, no.3, pp.657 - 668
Abstract
The antioxidant capacity of extracts from 33 local Thai vegetables was determined by ABTS, DPPH, FRAP and FCRC assays. The extracts had a wide range of antioxidant activities and could be categorized into three groups: high, moderate and low antioxidant activities. The antioxidant activities of the four different assays were highly correlated (r > 0.98). Fourier transform infrared (FTIR) spectra and partial least square (PLS) regressions were used to predict the measured antioxidant capacities. The adjusted R-2 was higher than 0.97 for prediction models and higher than 0.89 for cross-validation models, which could be applied on liquid extracts or freeze-dried extract. FTIR spectroscopy in combination with PLS regression successfully predicted the antioxidant capacity of several Thai vegetables.
Keywords
CIOCALTEU REDUCING CAPACITY; PHENOLIC-COMPOUNDS; MEDICINAL-PLANTS; FLAVONOIDS; PREVENTION; CHEMISTRY; DISEASES; ASSAYS; FRUIT; HERBS; CIOCALTEU REDUCING CAPACITY; PHENOLIC-COMPOUNDS; MEDICINAL-PLANTS; FLAVONOIDS; PREVENTION; CHEMISTRY; DISEASES; ASSAYS; FRUIT; HERBS; Thai vegetables; antioxidant; infrared spectroscopy; partial least square regression
ISSN
0125-2526
URI
https://pubs.kist.re.kr/handle/201004/125276
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KIST Article > 2015
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