Abstract
Dalbergia latifolia or sonokeling is a native species of Java, Indonesia, used as an important wood for furniture and building materials, due to the high of durability and beautiful color. This study, therefore, aim to investigate the phenol composition, represented by total phenolic, flavonoid, and flavanol content, as well as antioxidant activity, conducted by DPPH (1, 1-diphenyl-2-picrylhydrazyl) method on Dalbergia latifolia wood. The sample was extracted using ethanol-toluene solvent in a Soxhlet apparatus, and subsequently subjected to column chromatography. This treatment yielded 12 fractions, which were then evaluated for phenol contents and antioxidant activity. The results showed a high antioxidant activity and total phenolic content in Fr.1- Fr.3, while latifolin was detected and characterized by GC-MS and a literature comparison. Therefore, it was established that the antioxidant activity of D. latifolia wood extractives properly correlated with the total phenolic, but not with the total flavonoid and flavanol contents.
Highlights
Dalbergia latifolia called sonokeling (Javanese) or Java palisander (English) is a native species from Indonesia, known to possess beautiful wood, with a brown to dark brown color (Orwa et al 2009)
The yield of D. latifolia ethanol-toluene extract was not mentioned in this report, Table 1 shows the result of sample fractionation
It is established that D. latifolia wood extractives is dominated by apolar compounds, Fr. 12 yielded 0.59 g in the MeOH-water soluble fraction
Summary
Dalbergia latifolia called sonokeling (Javanese) or Java palisander (English) is a native species from Indonesia, known to possess beautiful wood, with a brown to dark brown color (Orwa et al 2009). They are classified as highly resistant, naturally durable (Kalynasundaran and Ganti 1975), placed in strength class II (Dwianto et al 2019), and deliver good acoustical properties (Karlinasari et al 2012). The wood, bark, and leaves extracts were reported to confer anticancer and antioxidant effect (Khalid et al 2011; Niraimathi and Sundaraganapathy 2014; Liu et al 2018; Tripathi 2018). Other investigations performed on the genus Dalbergia demonstrated the propensity for the leaf extract of D. saxatilis to increase kidney toxicity (Ismail et al 2015), D. sisoo to function as a photoprotective and DNA protective agents (Yasmeen and Gupta 2016), while D. parviflora contained antioxidant isoflavonoids (Castellano and Torrens 2015)
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