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<p>In this work, fourteen deep eutectic solvents (DES), four conventional solvents and four extraction techniques (ultrasonic-assisted, microwave-assisted, maceration and Soxhlet extractions) were tested for polysaccharide and antioxidant extraction from sweet and edible <i>Larinus</i> cocoon (<i>Shakar tigal</i>). Finally, Choline chloride-citric acid (DES) and ultrasonic-assisted extraction (UAE) were selected as the best solvent and technique for polysaccharides and antioxidants extraction. The Box-Behnken design (BBD) and response surface methodology (RSM) were used to optimize extraction variables (temperature, time, water content in choline chloride-citric acid, and liquid-to-solid ratio) in ultrasonic-assisted extraction. At optimum condition, total carbohydrate content and extraction yield were 5.32&#xa0;mg Glu/gdw and 66.7%, respectively. Based on monosaccharide composition analysis, extracted polysaccharides had arabinose, xylose, glucose and galactose (molar ratio: 1:2.18:6.07:5.17). Presence of galactouronic acid (about 28.3%) was also confirmed by GC analysis. Based on TGA and DSC thermal analysis, extracted polysaccharides had the highest mass loss (about 50%) between temperatures of 250–370&#xa0;°C. Antioxidant activity of extract was evaluated by different assays such as total phenolic (TPC) and total flavonoid content (TFC), DPPH assay, ferric-reducing antioxidant power (FRAP), trolox equivalent antioxidant capacity (TEAC) and reducing power assay (RPA).</p>

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Comparison of different solvents and techniques for extraction of polysaccharides and antioxidants from Shakar tigal

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Reza Tabaraki,
  • Fariba Fatahi,
  • Tahereh Ahmady

摘要

In this work, fourteen deep eutectic solvents (DES), four conventional solvents and four extraction techniques (ultrasonic-assisted, microwave-assisted, maceration and Soxhlet extractions) were tested for polysaccharide and antioxidant extraction from sweet and edible Larinus cocoon (Shakar tigal). Finally, Choline chloride-citric acid (DES) and ultrasonic-assisted extraction (UAE) were selected as the best solvent and technique for polysaccharides and antioxidants extraction. The Box-Behnken design (BBD) and response surface methodology (RSM) were used to optimize extraction variables (temperature, time, water content in choline chloride-citric acid, and liquid-to-solid ratio) in ultrasonic-assisted extraction. At optimum condition, total carbohydrate content and extraction yield were 5.32 mg Glu/gdw and 66.7%, respectively. Based on monosaccharide composition analysis, extracted polysaccharides had arabinose, xylose, glucose and galactose (molar ratio: 1:2.18:6.07:5.17). Presence of galactouronic acid (about 28.3%) was also confirmed by GC analysis. Based on TGA and DSC thermal analysis, extracted polysaccharides had the highest mass loss (about 50%) between temperatures of 250–370 °C. Antioxidant activity of extract was evaluated by different assays such as total phenolic (TPC) and total flavonoid content (TFC), DPPH assay, ferric-reducing antioxidant power (FRAP), trolox equivalent antioxidant capacity (TEAC) and reducing power assay (RPA).