Abstract
This study optimized the sonication-assisted hydrodistillation (SAHD) process for extracting essential oil (EO) from Cinnamomum tamala leaves, aiming to maximize yield and antioxidant activity. Both response surface methodology (RSM) and artificial neural network (ANN) models were used to predict extraction performance. The interpretability of the ANN model was enhanced using a neural interpretation diagram (NID), Olden’s algorithm, and sensitivity analysis, and it demonstrated higher accuracy and generalization than RSM. Under optimized conditions, the EO yield reached 1.67 ± 0.13%, with strong antioxidant activity indicated by a total phenolic content (TPC) of 79.24 ± 0.82 mg GAE/g and 81.54 ± 0.88% inhibition of the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH). Residual analysis showed that both models satisfied key regression assumptions, including normality, independence, homoscedasticity, and lack of bias. Gas chromatography–mass spectrometry (GC–MS) analysis identified linalool (47.37%), eugenol (18.34%), and cinnamaldehyde (16.45%) as key constituents. Physicochemical characterization verified EO quality and stability. The integrated modeling approach provides a robust framework for enhancing EO extraction efficiency.
Data availability
Data will be made available on request from the corresponding author.
References
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This work was carried out in collaboration among all authors. P.H.J. led the conceptualization, conducted the formal analysis, developed the methodology, performed the investigation, and wrote the first draft of the manuscript. P.H.J. and J.H.S. implemented the software, and both contributed to data validation. J.H.S. also contributed to formal analysis & methodology and critically reviewed & edited the manuscript. M.K.A. and O.R. participated in methodology development, experimental investigations, and manuscript reviewing. M.U.T. supported the research through the provision of resources, methodological assistance, and conducting investigations. G.M.R.I. conceptualized and designed the study, supervised the entire project, provided necessary resources, assisted in manuscript revision, and managed the overall project administration. All authors read and approved the final manuscript.
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Jon, P.H., Shourove, J.H., Ali, M.K. et al. Optimizing sonication-assisted hydrodistillation of Cinnamomum tamala essential oil using response surface methodology and artificial neural network modeling. Sci Rep (2026). https://doi.org/10.1038/s41598-026-42869-2
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DOI: https://doi.org/10.1038/s41598-026-42869-2