ABSTRAK Bahan alam dapat dijadikan bahan obat baru karena mengadung metabolit sekunder. Di Indonesia terdapat lebih kurang 30.000 jenis tumbuh-tumbuhan yang mengandung metabolit sekunder, lebih kurang 7.500 jenis diantaranya termasuk tanaman berkhasiat obat. Salah satunya adalah tanaman kasturi (Mangifera casturi Kosterm.). Tanaman M. casturi merupakan tumbuhan khas Kalimantan Selatan yang hanya dimanfaatkan oleh masyarakat untuk dikonsumsi, tidak untuk pengobatan. Penelitian ini bertujuan untuk menentukan kadar flavonoid total dan aktivitas antioksidan dari ekstrak etanol daun M. casturi. Penelitian ini bersifat non-eksperimental. Sampel yang digunakan adalah daun M. casturi yang berasal dari Kabupaten Banjar, Kalimantan Selatan. Penentuan Kadar flavonoid total dilakukan secara spektrofotometri UV-Vis dengan pereaksi kompleks AlCl3 sedangkan aktivitas antioksidan ditentukan dengan metode DPPH (2,2-difenil-1-pikrilhidrazil). Hasil penelitian diperoleh kadar flavonoid total ekstrak etanol daun M. casturi sebesar 9,31 ± 0,08 %b/b dan aktivitas antioksidan dengan nilai IC50 sebesar 34,558 ppm sehingga termasuk dalam kategori antioksidan yang sangat aktif. Kata kunci: Antioksidan, DPPH, Flavonoid Total, Mangifera casturi. ABSTRACT Natural resources can be used as the new medicine ingridients because it has second metabolite. In Indonesia, there are more than 30.000 kinds of plants that contain second metabolite, more or less than 7.500 kinds of those are medicinal plants. One of those plants is Kasturi (Mangifera casturi Kosterm.). M. casturi is a typical plant from South Kalimantan that be used as a food not as a medicine. The purpose of this research is to determine the total of flavonoid content and anti-oxidant activity from ethanol extract of M. casturi leaves. This study is a non-experimental research. Sample which used in this research is M. casturi Leaves from Banjar Region, South Kalimantan. The research for total Flavonoid content is done by UV-Vis spectrophotometric with AlCl3 reagent complex while the anti-oxidant activity is determined by DPPH (2,2-difenil-1-pikrilhidrazil) method. The result of this research are extract of M. casturi leaves obtains 9,31 ± 0,08 %b/b of total flavonoid and the antioxidant activity result with IC50 value is 34,558 ppm, so it can be categorized as a very active anti-oxidant. Keywords: Antioxidant, DPPH, Total Flavonoid, Mangifera casturi.

ABSTRAK Penggunaan jenis dan konsentrasi pelarut ekstraksi merupakan beberapa hal yang dapat mempengaruhi jumlah rendemen dan kandungan metabolit sekunder suatu ekstrak. Bangkal (Nauclea subdita) merupakan salah satu tumbuhan di Kalimantan Selatan, dan bagian kulit batangnya sering dimanfaatkan oleh masyarakat setempat untuk mengatasi pengaruh buruk sinar matahari. Penelitian ini bertujuan untuk menentukan rendemen dan kandungan flavonoid total dalam ekstrak etanol kulit batang bangkal dengan metode maserasi ultrasonikasi. Konsentrasi pelarut etanol divariasikan menjadi 30%, 50%, 70%, dan 96%. Hasil rendemen yang diperoleh untuk masing-masing konsentrasi tersebut yaitu 2,60%; 1,88%; 1;88%; 1,92%. Sedangkan total flavonoid yang diperoleh dari dua replikasi sebesar 12,329 ± 0,251 EK, 8,865 ± 0,058 EK, 18,012 ± 0,461 EK, dan 44,728 ± 2,525 EK. Kata kunci : bangkal (Nauclea subdita), rendemen, flavonoid total, maserasi ultrasonikasi ABSTRACT Solvent type and concentration were some factors that could effect extract yield and secondary metabolites content. Bangkal (Nauclea subdita) were one of the plant on South Kalimantan, and its bark were used to treat sunrays negative effect. This research was aimed to determined extract yield and total flavonoid content using ultrasonicated maceration methode. Ethanol concentration were varied to 30%, 50%, 70%, and 96%. Yield obtained from those concentrations were 2.06% , 1.88%, 1.88%, and 1.92%, respectively. While total flavonoid content obtained from conducted in duplication were 12.329 ± 0.251 QE, 8.865 ± 0.058 QE, 18.012 ± 0.461 QE, and 44.728 ± 2.525 QE, respectively. Keywords: Nauclea subdita, extract yield, total flavonoid, ultrasonicated maceration.

Red fruit oil (RFO) can be extracted from fruits of Pandanus conoideus, Lam., an endogenous plant of Papua, Indonesia. It is a commonly used essential original traditional medicine. By applying a newly developed quantitative 1H NMR (qNMR) spectroscopy method for quality assessment, a simultaneous determination of the saponification value (SV), acid value (AV), ester value (EV), and iodine value (IV) in RFO was possible. Dimethyl sulfone (DMSO2) was used as an internal standard. Optimization of NMR parameters, such as NMR pulse sequence, relaxation delay time, and receiver gain, finally established the 1H NMR-based quantification approach. Diagnostic signals of the internal standard at δ = 2.98 ppm, SV at δ = 2.37–2.20 ppm, AV at δ = 2.27–2.20 ppm, EV at δ = 2.37–2.27 ppm, and IV at δ = 5.37–5.27 ppm, respectively, were used for quantitative analysis. The method was validated concerning linearity (R2 = 0.999), precision (less than 0.83%), and repeatability in the range 99.17–101.17%. Furthermore, this method was successfully applied to crude RFO, crude RFO with palmitic and oleic acid addition, and nine commercial products. The qNMR results for the respective fat values are in accordance with the results of standard methods, as can be seen from the F- and t-test (< 1.65 and < 1.66, respectively). The fundamental advantages of qNMR, such as its rapidity and simplicity, make it a feasible and existing alternative to titration for the quality control of RFO.

The aim of this research is to determine the specific and non-specific parameter from ethanolic extract of A. microcarpa. Specific parameters such as the organoleptic properties, content of water and ethanol soluble compound, and chhromatogram profile of the extract. In contrast, the non-specific parameter includes drying losses, ash levels, microbiological contamination levels, and heavy metal contamination levels. The results showed that the organoleptic properties of ethanolic extract of A. microcarpa was thick, blackish brown color, bitter taste and have distinctive odor. The average content of water-soluble compounds of 66.93%, ethanol-soluble of 47.97%, and chromatogram profile with Rf 0.636. The non-specific parameters results were drying losses of 5.50%, total ash content of 3.73%, acid-insoluble ash of 2.13%, microbial contamination testing results of 1.2x102-5.5x103 colonies/g, and total mold/ yeast contaminants of 10-100 colonies/g. Heavy metal contamination Pb levels and Cd levels were 5.47 mg/kg and 0.19 mg/kg respectively. These studies suggested that the observed specific and non-specific parameters may be helpful for establishing pharmacopoeia standards of A. microcarpa and to ensure uniformity of extract effect.