Rapid Prediction of Fig Phenolic Acids and Flavonoids Using Mid-Infrared Spectroscopy Combined With Partial Least Square Regression

Abstract

Graphical AbstractScheme diagram showing the research methodology and analytical approaches.

Determination of glucosinolates in broccoli (Brassica oleracea var. italica) by combining mid‐infrared (MIR) spectroscopy with chemometrics

“…Environmental factors, seasonal variations and agricultural practices (e.g. irrigation and fertilisation) are considered key pre-harvest factors influencing GSLs content in broccoli (Ilahy et al, 2020). In addition, post-harvest treatments (e.g.…”

“…In addition, post-harvest treatments (e.g. pulsed electric field and ultrasonic treatments), packaging and storage can also irreversibly impact the content and GL profile in broccoli (Ilahy et al, 2020). Thus, it is important to monitor the levels of GSLs, both pre-and post-harvest to inform best practices that ensure broccoli GSLs are preserved or least affected.…”

“…sharp peaks and resolution) (Sacre et al, 2014;Ali Redha et al, 2023). Moreover, MIR spectroscopy has shown promising results in determining different phytochemicals in different plant species including anthocyanins, flavonoids and polyphenol in blueberries (Sinelli et al, 2008), polyphenols in figs (Hssaini et al, 2022), capsaicin in serrano pepper (Domıńguez-Martıńez et al, 2014) and polyphenols in tea (Li et al, 2015).…”

Comparative Determination of Phenolic Compounds in Arabidopsis thaliana Leaf Powder under Distinct Stress Conditions Using Fourier-Transform Infrared (FT-IR) and Near-Infrared (FT-NIR) Spectroscopy

“…Although these techniques are susceptible and precise for measuring phenolic compounds (flavonoid) and can measure at nanogram and picogram levels, the applications of these techniques are often time-consuming, destructive, and generate much chemical waste. On the other hand, Joshi [ 11 ], Arslan [ 17 ], and Hssaini [ 18 ] performed phenolic compounds identification using MIR spectroscopy and a hand-held spectral analytical system and acquired a higher correlation (R 2 ) value of 0.99; still, their studies are limited and cannot provide measurements of phenolic compounds under different stress conditions (LED lights + water). The limitations of all aforementioned studies were resolved in this study by measuring the phenolic compounds of A. thaliana plants powder matrices under various stresses and acquiring a higher correlation coefficient (R 2 ) value of 0.999 and a minimum error (RMSEP) value of 0.003 mg/g.…”

“…In the past, multiple studies were performed that have identified the phenolic compounds present in different agricultural products like yerba mate [ 14 ], Ginkgo biloba leaf [ 15 ], and Radix Salvia Miltrorrhiza extract [ 16 ] using spectroscopic techniques. Moreover, in 2020, 2021, and 2022, Arslan et al [ 17 ], Hssaini et al [ 18 ], and Joshi et al [ 11 ] predicted the phenolic compounds in puffs, figs, and moringa powder using a hand-held spectral analytical system and mid-IR spectroscopy in combination with regression analysis. However, the combined applications of FT-IR and FT-NIR spectroscopy for the non-destructive prediction of phenolic compounds in plants under different stress conditions are still limited and not yet fully explored in scientific research.…”