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Intensified extraction of geraniol from palmarosa leaves using diverse hydrotrope-assisted extraction techniques

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Abstract

Geraniol is a crucial component in the leaves of palmarosa (Cymbopogon martini) and it has a wide range of biological properties and applications. A brand-new concept of hydrotrope-assisted extraction is proposed for the isolation of geraniol using different techniques such as microwave technology (MAHE), hydro distillation (HAHD), and ultrasound technology (UAHE) in this study. A solubility test was carried out between two different hydrotropes such as sodium salicylate and resorcinol to find out the better hydrotrope for the extraction. At 40% (w/v), sodium salicylate has higher solubility (3.74% (w/v)) than resorcinol. Response surface methodology (RSM) was performed for all techniques to optimize the process parameters by varying the volume of hydrotrope solution from 300 to 600 mL and extraction time from 5 to 25 min. A maximum yield of 2.47% (w/w) was obtained during the UAHE process under the optimized condition of 5 min sonication time, 600 mL volume of 0.42 M of sodium salicylate and 120 W ultrasound power. The geraniol content was identified by using gas chromatogram and found to be 0.31% in 10 mL of sample obtained from UAHE technique. Therefore, the ultrasound-assisted hydrotrope technique has highly recommended to sustainable development for large-scale application.

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Acknowledgements

The authors are thankful to the Department of Chemical Engineering, Sri Venkatswara College of Engineering, Chennai for the technical support provided.

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The data that support the findings of this study are available from the corresponding author, upon reasonable request.

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  1. Department of Chemical Engineering, Sri Venkateswara College of Engineering, Pennalur, Sriperumbudur (TK), Chennai, 602117, India

    Ramasamy Govindarasu, Divya Baskaran, Palanisamy Vignesh & Pranava Sai Raju Nannapuraju

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  1. Ramasamy Govindarasu
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  2. Divya Baskaran
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  3. Palanisamy Vignesh
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  4. Pranava Sai Raju Nannapuraju
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Contributions

Ramasamy Govindarasu: methodology, conceptualization, and supervision. Divya Baskaran: data validation and final draft review and editing. Palanisamy Vignesh and Pranava Sai Raju Nannapuraju: writing first draft and formal analysis. All authors read and approved the final manuscript.

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Correspondence to Ramasamy Govindarasu.

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Govindarasu, R., Baskaran, D., Vignesh, P. et al. Intensified extraction of geraniol from palmarosa leaves using diverse hydrotrope-assisted extraction techniques. Biomass Conv. Bioref. 14, 10585–10598 (2024). https://doi.org/10.1007/s13399-023-04108-w

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