@article {2525, title = {Analysis of Solvent Concentration Effect and Extraction Method on The Total Phenolic of Syzygium myrtifolium Walp. Leaf Extract}, journal = {Pharmacognosy Journal}, volume = {17}, year = {2025}, month = {August 2025}, pages = {461-469}, type = {Original Article}, chapter = {461}, abstract = {

Background: Syzygium myrtifolium Walp., an Indonesian ornamental plant, contains phenolic compounds with antioxidant, anti-inflammatory, and antibacterial activities. The demand for natural antioxidants is rising due to concerns over synthetic alternatives. Objectivity: To determine the total phenolic content (TPC) and antioxidant activity of S. myrtifolium leaf extracts obtained with various solvents (ethanol 60, 70, 80, 96\% v/v, ethyl acetate, n-hexane) and two extraction methods (maceration and ultrasonic-assisted extraction, UAE), and to assess the effects of solvent polarity and extraction method. Methods: Leaves were extracted by maceration and UAE. TPC was measured via the Folin{\textendash}Ciocalteu method (tannic acid equivalents, \%) using UV{\textendash}Vis spectrophotometry. Antioxidant activity was evaluated using the DPPH assay (IC$_{5}$$_{0}$). Phytochemical screening was also performed. Results: TPC (maceration): 60\% ethanol = 18.76\%, 96\% ethanol = 13.64\%, ethyl acetate = 8.33\%, n-hexane = 0.83\%. TPC (UAE): 60\% ethanol = 20.02\%, 96\% ethanol = 14.04\%, ethyl acetate = 10.13\%, n-hexane = 0.92\%. Solvent type/concentration and extraction method significantly affected TPC (p \< 0.05). UAE 96\% ethanol showed the strongest antioxidant activity (IC$_{5}$$_{0}$ ≈ 16.03 ppm), ethyl acetate had moderate activity (≈67{\textendash}76 ppm), and n-hexane the weakest (≈153{\textendash}163 ppm). UAE 60\% ethanol had the highest TPC but not the strongest activity (IC$_{5}$$_{0}$ ≈ 88.27 ppm), suggesting antioxidant potency depends on phenolic composition. Conclusion: UAE with 60\% ethanol produced the highest TPC, while UAE with 96\% ethanol exhibited the strongest antioxidant activity. Further profiling is needed to clarify the phenolic composition{\textendash}activity relationship.

}, keywords = {Maceration, phenolic, solvent concentration, Syzigium myrtifolium walp, UAE}, doi = {10.5530/pj.2025.17.59}, author = {Novi Fajar Utami and Rizky Mulyana Syarif and Chorry Sundari Irawan and Shintia Ramadhani} }