Abstract
This study aimed to study the impact of selected common organic solvents on extractable solids, phytochemical composition, and antioxidant capacity of S. chinensis. The results showed that the tested solvents played an important role in extraction of total solid and phytochemical composition as well as antioxidant capacity of S. chinensis. Acetone (50% v/v) was found to be the optimal extraction solvent for extractable solids (12.2%), phenolic compounds (60 mg GAE/g DW), flavonoids (100 mg CE/g DW), proanthocyanidins (47.4 mg CE/g DW), and saponins (754 mg EE/g DW) as well as antioxidant capacity (ABTS 334 mM TE/g DW, DPPH 470 mM TE/g DW, FRAP 347 mM TE/g DW, and CUPRAC 310 mM TE/g DW). The extract prepared from 50% acetone had high levels of bioactive compounds (TPC 555 mg GAE/g CRE, flavonoids 819 mg CE/g CRE, proanthocyanidins 392 mg CE/g CRE, and saponins 1,880 mg EE/g CRE) as well as antioxidant capacity (ABTS 414 mM TE/g, DPPH 407 mM TE/g, FRAP 320 mg TE/g, and CUPRAC 623 mM TE/g), thus further confirming that 50% acetone is the solvent of choice. Therefore, 50% acetone is recommended for extraction of phenolic compounds, their secondary metabolites, saponins, and antioxidant capacity from the root of S. chinensis for further isolation and utilisation.
Highlights
Salacia chinensis L. (S. chinensis) belongs to the genus Salacia of the family Celastraceae
Extraction solvents have been extensively studied in other plant materials, such as macadamia skin waste [7], S. chinensis fruit pulp [8], and basil leaf [9], none of the previous studies have compared the impact of different common solvents on the extraction efficiency of phenolic compounds from the S. chinensis root
The result of this study showed that different solvents had significant effects on the extractable solids yield of S. chinensis root (Figure 1)
Summary
Salacia chinensis L. (S. chinensis) belongs to the genus Salacia of the family Celastraceae. S. chinensis has been brewed or decocted in water for use as a traditional medicine in some Asian countries, such as India, Sri Lanka, and Vietnam [2, 3]. Previous studies have used methanol, petroleum ether, chloroform, ethanol, acetone, and water as the solvents for extracting bioactive compounds from S. chinensis for further analysis [4,5,6]. Extraction solvents have been extensively studied in other plant materials, such as macadamia skin waste [7], S. chinensis fruit pulp [8], and basil leaf [9], none of the previous studies have compared the impact of different common solvents on the extraction efficiency of phenolic compounds from the S. chinensis root. This study aimed to determine the impact of different common solvents
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