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Statement of Novelty <p>This work explores the valorization of industrial potato waste, specifically peel and mash, for the extraction of bioactives. The extract can subsequently be utilized in food applications, promoting a sustainable approach to waste utilization.</p> Purpose <p>This study investigates the optimization and comparative efficiency of ultrasound-assisted extraction (UAE) and magnetic stirring extraction (MSE) for recovering bioactive compounds from industrial potato by-products in the form of potato peel (PP) and potato mash (PM).</p> Methods <p>UAE was performed by varying frequencies (20–40&#xa0;kHz), extraction times (5–15&#xa0;min), solid-to-liquid ratios (1:10–1:30), and ethanol concentrations (25–75%). MSE was conducted using temperatures (30–50&#xa0;°C), durations (30–60&#xa0;min), solid-to-liquid ratios (1:10–1:30), and ethanol concentrations of of (25–75%). Extracts were evaluated for total phenolic content (TPC), total flavonoid content (TFC), DPPH radical scavenging activity, and ferric reducing antioxidant power (FRAP). Phytochemicals and structural characterization were performed using HPLC, FTIR, and FESEM.</p> Results <p>UAE conditions (30&#xa0;kHz, 15&#xa0;min, 1:30 SLR, 25% ethanol) yielded the highest TPC (522.98&#xa0;mg GAE/100&#xa0;g), TFC (313.42&#xa0;mg QE/100&#xa0;g), DPPH (2.50&#xa0;µmol TE/100&#xa0;g), and FRAP (280.56&#xa0;µmol TE/100&#xa0;g) for PP. For PM, maximum values were observed at 20&#xa0;kHz, 15&#xa0;min, 1:30 SLR, and 50% ethanol, with corresponding value of 385.89&#xa0;mg GAE/100&#xa0;g, 276.56&#xa0;mg QE/100&#xa0;g, 1.69&#xa0;µmol TE/100&#xa0;g, and 279.90&#xa0;µmol TE/100&#xa0;g, respectively. In contrast, MSE under optimal conditions (50&#xa0;°C, 60&#xa0;min, 1:30 SLR, 25% ethanol) showed significantly lower values for both PP and PM extract samples.</p> Conclusion <p>UAE exhibited superior extraction efficiency and cell wall disruption. HPLC analysis revealed the presence of major bioactive compounds. FTIR spectra indicated characteristic functional groups corresponding to hydroxyl and carbonyl bonds indicating strong antioxidant potential. FESEM imaging showed significant surface morphological changes in the waste material after extraction, supporting efficient bioactive compounds recovery. This confirms its potential as an efficient and sustainable approach for bioactive recovery from potato by-products for functional food applications.</p> Graphical abstract

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Ultrasound-Assisted Extraction and Magnetic Stirring Extraction of Bioactive Compounds From Industrial Potato Processing Waste: A Sustainable Green Process

  • 期刊论文

  • 发表日期：

    2026年3月15日

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  • Palak Singh,
  • Sukhpreet Kaur,
  • Poonam Aggarwal,
  • Navjot Kaur,
  • Sunil Kumar

摘要

Statement of Novelty

This work explores the valorization of industrial potato waste, specifically peel and mash, for the extraction of bioactives. The extract can subsequently be utilized in food applications, promoting a sustainable approach to waste utilization.

Purpose

This study investigates the optimization and comparative efficiency of ultrasound-assisted extraction (UAE) and magnetic stirring extraction (MSE) for recovering bioactive compounds from industrial potato by-products in the form of potato peel (PP) and potato mash (PM).

Methods

UAE was performed by varying frequencies (20–40 kHz), extraction times (5–15 min), solid-to-liquid ratios (1:10–1:30), and ethanol concentrations (25–75%). MSE was conducted using temperatures (30–50 °C), durations (30–60 min), solid-to-liquid ratios (1:10–1:30), and ethanol concentrations of of (25–75%). Extracts were evaluated for total phenolic content (TPC), total flavonoid content (TFC), DPPH radical scavenging activity, and ferric reducing antioxidant power (FRAP). Phytochemicals and structural characterization were performed using HPLC, FTIR, and FESEM.

Results

UAE conditions (30 kHz, 15 min, 1:30 SLR, 25% ethanol) yielded the highest TPC (522.98 mg GAE/100 g), TFC (313.42 mg QE/100 g), DPPH (2.50 µmol TE/100 g), and FRAP (280.56 µmol TE/100 g) for PP. For PM, maximum values were observed at 20 kHz, 15 min, 1:30 SLR, and 50% ethanol, with corresponding value of 385.89 mg GAE/100 g, 276.56 mg QE/100 g, 1.69 µmol TE/100 g, and 279.90 µmol TE/100 g, respectively. In contrast, MSE under optimal conditions (50 °C, 60 min, 1:30 SLR, 25% ethanol) showed significantly lower values for both PP and PM extract samples.

Conclusion

UAE exhibited superior extraction efficiency and cell wall disruption. HPLC analysis revealed the presence of major bioactive compounds. FTIR spectra indicated characteristic functional groups corresponding to hydroxyl and carbonyl bonds indicating strong antioxidant potential. FESEM imaging showed significant surface morphological changes in the waste material after extraction, supporting efficient bioactive compounds recovery. This confirms its potential as an efficient and sustainable approach for bioactive recovery from potato by-products for functional food applications.

Graphical abstract