Gynura procumbens is known as one of the herbal medicinal plants found in Indonesia and has been used from time to time. It is claimed to have various efficacy such as anti-hyperglycemic, anti-hypertension, anti-microbial, anti-cancer, and antioxidant. Other studies mention that G. procumbens possessed high antioxidant compounds and had been used as a natural-based medicinal supplement. However, further studies on optimizing the extraction process of Gynura procumbens in Indonesia have yet to be reported. Therefore, this study aimed to optimize the extraction condition of G. procumbens leaves by maceration with three variables: solvent concentration, extraction time, and the ratio of solid-liquid used. Each of those variables contained three different levels. Determination of total flavonoid and antioxidant activity was measured using aluminium chloride colourimetric assay and 2, 2-diphenyl-1-picryl-hydrazil (DPPH) assay, respectively. In the optimization process, Response Surface Methodology (RSM) was used to explore the main effects and interaction between parameters and their correlations with dependent variables. The results were analyzed using the Box-Behnken method using Minitab software 17. This study shows that the most significant effect of the variable for both flavonoid and antioxidant activity was solvent concentration, with a P<0.05. The results showed that the extraction process to obtain G. procumbens extract with optimal flavonoid content and antioxidant activity (IC50) was predicted at 70% solvent concentration, 1 h maceration time, and a solid-liquid ratio of 1:9.8 w/v, with results of 17.599 mg QE/g extract and 0.211 mg/mL, respectively. This study was expected to complement other studies and can be used as an additional reference for the development of the extraction process on a larger scale.

Zingiber officinale (Ginger) was widely known as one of the most herbal medicines containing many bioactive compounds claimed to be useful as an antioxidant, anti-inflammatory, anti-cancer, and anti-coagulant. Gingerol, shogaol, and paradol are some of the most bioactive compounds found in ginger. Several studies have been conducted to isolate the bioactive compounds. However, a study about simultaneous isolation with a fast and effective methodology has yet to be found in Indonesia. Therefore, this study aimed to simultaneously isolate the bioactive compounds such as 6-gingerol, 6-shogaol, and 6-paradol in ginger using Vacuum Liquid Chromatography (VLC). Etil acetate (EA) fraction from the ginger crude extract was treated with VLC using a mix of hexane-EA as a mobile phase to gain the isolates, and then it was purified using HPLC semi-prep. 6-gingerol and 6-shogaol were found in the fraction of VLC 80% hexane. Meanwhile, 6-paradol was found in the fraction VLC 90% hexane. Further isolation of each compound was conducted using semi-prep HPLC. LC-MS was used to confirm the molecular weight of each isolate compared to the literature. This study obtained isolate 6-gingerol, 6-shogaol, and 6-paradol with a purity of 99%, 94%, and 92%, respectively.Keywords: Isolation; Zingiber officinale; 6-gingerol; 6-shogaol; 6-paradol; VLCABSTRAKIsolasi 6-Gingerol, 6-Shogaol, dan 6-Paradol dari Tanaman Zingiber officinale (Jahe) secara Simultan dengan Menggunakan Metode Vaccum Liquid Chromatography (VLC)Zingiber officinale (jahe) merupakan salah satu dari jenis tanaman obat yang memiliki banyak kandungan senyawa aktif yang bermanfaat sebagai antioksidan, antiinflamasi, antikanker, dan antikoagulan. Gingerol, shogaol, dan paradol adalah beberapa jenis senyawa aktif yang umumnya dapat ditemukan pada tanaman ini. Sejumlah penelitian telah dilakukan untuk proses isolasi senyawa tersebut. Akan tetapi, di Indonesia, isolasi senyawa tersebut belum dilakukan secara simultan dan efektif. Oleh karena itu, penelitian ini bertujuan untuk melakukan isolasi senyawa aktif 6-gingerol, 6-shogaol, dan 6-paradol secara simultan menggunakan metode Vaccum Liquid Chromatography (VLC). Fraksi etil asetat dari ekstrak jahe di VLC dengan campuran perlarut heksan-etil asetat (EA) untuk memperoleh isolat senyawa dan kemudian dimurnikan dengan menggunakan HPLC semi-prep. Pada hasil VLC 80 % heksana didapatkan senyawa 6-gingerol dan 6-shogaol. Sementara senyawa 6-paradol didapatkan pada VLC 90 % heksana. Selanjutnya, konfirmasi berat molekul senyawa dilakukan menggunakan LC-MS untuk mecocokkan dengan literatur yang sudah ada. Dari hasil penelitian didapatkan isolat senyawa aktif jahe berupa 6-gingerol, 6-shogaol, dan 6-paradol, masing-masing dengan kemurnian 99 %, 94 %, dan 92 %.Kata kunci : Isolasi, Zingiber officinale, 6-gingerol, 6-shogaol, 8-paradol, VLC