scholarly journals Triterpenoids from the wood of Willughbeia cochinchinensis

2018 ◽  
Vol 1 (T5) ◽  
pp. 137-142
Author(s):  
Linh Thi My Lam ◽  
Phu Hoang Dang ◽  
Hai Xuan Nguyen ◽  
Nhan Trung Nguyen ◽  
Mai Thi Thanh Nguyen
Keyword(s):  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Silica Gel ◽  
Column Chromatography ◽  
Normal Phase ◽  
Reverse Phase ◽  
Chemical Structures ◽  
First Time ◽  
Layer Chromatography

From the wood of n-hexane extract of Willughbeia cochinchinensis, perform column chromatography on a normal phase silica gel with n-hexane: ethyl acetate obtained in 8 fractions. From GD-D and GD-F fractions, multiple column chromatography on silica gel was performed in combination with normal and reverse phase thin-layer chromatography, four triterpene compounds as epifriedelanol (1), taraxeryl acetate (2), ambolic acid (3) and α- amyrin (4) were isolated. Their chemical structures were determined by spectrocopic methods as well as comparing with data in the literature. These compounds were isolated for the first time from Willughbeia cochinchinensis.

scholarly journals Chemical constituents of Euphorbia tirucalli L.

2019 ◽  
Vol 2 (5) ◽  
pp. 76-82
Author(s):  
Dung Thi Kim Le ◽  
Hao Xuan Bui ◽  
Tuyet Thi Anh Nguyen ◽  
Tuyen Nguyen Kim Pham ◽  
Huy Thuc Duong
Keyword(s):  
Thin Layer ◽  
Gallic Acid ◽  
Spectroscopic Analysis ◽  
Chemical Constituents ◽  
Normal Phase ◽  
Chemical Structures ◽  
Euphorbia Tirucalli ◽  
Arjunolic Acid ◽  
First Time ◽  
Layer Chromatography

Euphorbia tirucalli has not been chemically studied much in Vietnam. This research described the isolation and elucidation of compounds isolated from the plant collected in Binh Thuan. Multiple chromatographic methods were applied, including normal phase silica gel column chromatography and thin-layer chromatography. Seven compounds were isolated and their chemical structures were elucidated by spectroscopic analysis as well as comparing their data with the ones in the literature. They are arjunolic acid (1), eriodictyol (2), quercitrin (3), afzelin (4), scopoletin (5), 3,3′,4- trimethylellagic acid (6), and gallic acid (7). Among them, compound 1 a major component was isolated for the first time in Euphorbia genus, while three compounds 2, 4, and 5 were isolated from this species for the first time.

scholarly journals Separation of Berberine Hydrochloride and Tetrahydropalmatine and Their Quantitative Analysis with Thin Layer Chromatography Involved with Ionic Liquids

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Jing Lu ◽  
Hong-yan Ma ◽  
Wei Zhang ◽  
Zhi-guo Ma ◽  
Shun Yao
Keyword(s):  
Ionic Liquids ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Silica Gel ◽  
Simple Procedure ◽  
Berberine Hydrochloride ◽  
Chinese Patent ◽  
Ft Ir ◽  
First Time ◽  
Layer Chromatography

[BMIM]OH was used in mobile and stationary phase of thin layer chromatography (TLC) to analyze berberine hydrochloride and tetrahydropalmatine for the first time. Supported imidazole ionic liquid with hydroxide ion on silica gel (SiO2·Im+·OH−) was synthesized through simple procedure and characterized by Fourier transform infrared spectroscopy (FT-IR), elemental analysis, and scanning electron microscope (SEM). Moreover, on the plates prepared by SiO2·Im+·OH−, the contents of the above alkaloids in the Chinese patent medicine (CPM) of “Stomacheasy” capsule were successfully determined by TLC scanner. The key conditions and chromatographic behaviors were also investigated in detail. According to similar ways, ionic liquids (ILs) also can be used in other planar chromatographies in two modes. This study is expected to be helpful in expanding the application of IL and its bonded silica gel in TLC separation field.

Identifikasi Sediaan Jamu Kuat yang Beredar di Kecamatan Banguntapan dan Pleret Kabupaten Bantul dengan Metode KLT

2019 ◽  
Vol 14 (2) ◽  
pp. 103
Author(s):  
Dewi Umniyatul ◽  
Dwi Kurniawati Sambodo
Keyword(s):  
Herbal Medicine ◽  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Silica Gel ◽  
Plant Material ◽  
Uv Light ◽  
Sildenafil Citrate ◽  
Quota Sampling ◽  
Layer Chromatography

Background: Traditional herbs are ingredients or herbs in the form of plant material, animal ingredients, mineral ingredients, galenic preparations or mixtures of these ingredients, it has been used as medicine traditionally.Objective: This study is aimed to Identify of Sildenafil Citrate on “Jamu Kuat” (Herbal Medicine) products.Methods: This type of research was descriptive and the sample was determined by quota sampling. The method used Thin Layer Chromatography (TLC) which was a physicochemical method. There were seven samples were extracted by the soxhletation method until a thick extract was obtained to be spotted in the quite phase of TLC silica gel F254. The motion phase used to identify sildenafil citrate was chloroform: ethyl acetate (6: 4). Spots detection was done by observation under UV light 366 nm and the spots that appeared were calculated of Rf value and compared with the comparable Rf value of sildenafil citrate.Results: From this study, there were samples containing sildenafil citrate. Sample C with a sample Rf value of 0.75 and sample D with Rf value of sample 0.78 and a comparable Rf of sildenafil citrate 0.77.Conclusion: The seven samples of “Jamu Kuat” contained sildenafil citrate in Banguntapan and Pleret Districts, Bantul Regency. Keywords: Jamu Kuat (Herbal Medicine), Sildenafil citrate, TLC

Improved Method for the Thin Layer Chromatographic Determination of Patulin in Apple Juice

1973 ◽  
Vol 56 (4) ◽  
pp. 813-816 ◽  
Author(s):  
Peter M Scott ◽  
Barry P C Kennedy
Keyword(s):  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Silica Gel ◽  
Apple Juice ◽  
Chromatographic Determination ◽  
Improved Method ◽  
Layer Chromatography ◽  
Hydrochloride Solution

Abstract Apple juice from a freshly opened container is extracted 3 times with ethyl acetate. The extract is dried, concentrated, diluted with benzene, and added to a silica gel column. Patulin is eluted by benzene-ethyl acetate (75+25) and detected by thin layer chromatography, using a 3-methyl-2-benzothiazolinone hydrazone hydrochloride solution as the spray reagent. Satisfactory recoveries were obtained for patulin added to apple juice at levels of 25–400 μg/L.

Determination of 3-Methoxy-4-Hydroxymandelic Acid (VMA) in Urine by Thin-Layer Chromatography

1965 ◽  
Vol 11 (10) ◽  
pp. 905-913 ◽  
Author(s):  
J S Annino ◽  
M Lipson ◽  
L A Williams
Keyword(s):  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Silica Gel ◽  
Potassium Carbonate ◽  
Several Variables ◽  
Fast Red ◽  
Layer Chromatography

Abstract From studies of several variables, a method has been developed for the separation and quantitation of 3-methoxy-4-hydroxymandelic acid (VMA) in urine by thin-layer chromatography. The urine is pretreated with acid and Florisil, and then extracted with ethyl acetate. Thin-layer chromatography is performed on silica gel with a butanol: acetic acid:water solution. The VMA spot is located by spraying with fast red GG and potassium carbonate. After removal from the plate, maximum color is developed and quantitated by reading in a spectrophotometer at 510 mµ.

scholarly journals Antioxidant Activity of Daemonorops draco Resin

2019 ◽  
Vol 22 (5) ◽  
pp. 179-183 ◽  
Author(s):  
Sri Purwanti ◽  
Wulan Tri Wahyuni ◽  
Irmanida Batubara
Keyword(s):  
Antioxidant Activity ◽  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Column Chromatography ◽  
Ethyl Acetate Extract ◽  
Preparative Thin Layer Chromatography ◽  
Layer Chromatography

Jernang resin is secretion of jernang rattan (Daemonorops draco, Arecaceae family) fruits which is endemic in Southeast Asia. This resin has various biological activities and empirically used as wound healing, headache medicines, and fever remedies by Anak Dalam ethnic group from Jambi. This study was performed to evaluate the antioxidant activity of nonpolar fraction of D. draco resin which collected from Jambi Province, Sumatera, Indonesia. Resin was extracted with n-hexane, ethyl acetate, and methanol respectively. The antioxidant properties of the extracts were then evaluated using 1,1-diphenyl-2picryl-hidrazyl radical scavenging assay. The most active extract was further fractionated using n-hexane and methanol and separated using column chromatography and preparative thin layer chromatography. Separation of the extract was conducted through antioxidant assay-guided fractionation. Characterization of the active fraction was carried out by infrared spectroscopy. The result shows that ethyl acetate extract provides higher antioxidant activity (IC50 = 27.61 µg/mL) compare to methanol and n-hexane extracts. N-hexane fraction of ethyl acetate extract used for further separation using column and preparative thin layer chromatography due to its antioxidant activity. Separation using column chromatography resulting in 9 fractions (F.1-9). Fraction F.5 provide high antioxidant activity (IC50 = 17.27 µg/mL) and further separated using preparative thin layer chromatography resulting two fractions with lower antioxidant activity F.5.1 (IC50 = 85.18 µg/mL) and F.5.2 (IC50 = 34.94 µg/mL). Characterization of fraction F.5.2 using infrared spectroscopy showed that component in fraction F.5.2 contains NH-substituted benzene.

Identification and Quantitation of Corticosteroids and Their Esters in Pharmaceutical Preparations of Creams and Ointments by Thin-Layer Chromatography and Densitometry

1994 ◽  
Vol 77 (6) ◽  
pp. 1435-1438 ◽  
Author(s):  
Kajal Datta ◽  
Saroj K Das
Keyword(s):  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Silica Gel ◽  
Excellent Agreement ◽  
Pharmaceutical Preparation ◽  
Pharmaceutical Preparations ◽  
Insoluble Material ◽  
Ointment Base ◽  
Layer Chromatography

Abstract A rapid, simple, and specific thin-layer chromatographic (TLC) method is described for estimation of various corticosteroids and their esters when present in combination with other drugs in pharmaceutical preparation of creams and ointments. The cream or ointment is dissolved in chloroform; water and insoluble material, if any, are removed by centrifugation, and the steroid is separated from other ingredients by TLC on silica gel G with n-hexane as the first developing solvent (to wash out cream or ointment base) and chloroform–ethyl acetate (1 + 1 , v/v, for free steroids or 2 + 1 , v/v, for steroid esters) as the second developing solvent. The separated steroid or ester is visualized under shortwave UV (254 nm) and estimated by spectrodensitometry at 240 nm. Recoveries of the steroids are between 98.0 and 101.7%. Results were compared with those obtained by official methods, where applicable, and excellent agreement was found.

scholarly journals Analisis Kualitatif Kandungan Fenolik dalam Fraksi Etil Asetat dan Fraksi Metanol dari Ekstrak Kulit Jagung (Zea mays L.)

2021 ◽  
Vol 2 (1) ◽  
pp. 109
Author(s):  
Yuniarthi Dwi Suputri ◽  
Agus Dwi Ananto ◽  
Yayuk Andayani
Keyword(s):  
Qualitative Analysis ◽  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Silica Gel ◽  
Ethyl Acetate Fraction ◽  
Methanol Fraction ◽  
Corn Husk ◽  
Separation Result ◽  
Layer Chromatography

ABSTRAKProduksi tanaman jagung yang semakin meningkat menyebabkan peningkatan limbah kulit jagung semakin tinggi. Kulit jagung dapat dimanfaatkan dalam bidang kesehatan dan berpotensi sebagai antioksidan. Kulit jagung mengandung senyawa fenolik dan flavonoid yang dapat bertindak sebagai antioksidan. Tujuan dari penelitian ini adalah untuk mengetahui kandungan senyawa pada fenolikfraksi etil asetat dan fraksi metanol kulit jagung. Ekstraksi kulit jagung dilakukan dengan metode maserasi menggunakan pelarut etanol 96%. Fraksinasi ekstrak etanol kulit jagung dilakukan dengan fraksinasi bertingkat menggunakan pelarut metanol dan etil asetat. Kedua fraksi yang diperoleh kemudian dianalisis secara kualitatif dengan metode Kromatografi Lapis Tipis. Fase diam yang digunakan adalah plat silica gel G60F254 dan fase gerak yang digunakan adalah kombinasi eluen kloroform: etil asetat: n-butanol: asam format (5:2:2:1). Hasil pemisahan ditandai dengan munculnya noda bercak saat diamati dengan sinar UV 254 nm dan 366 nm. Nilai Rf bercak yang muncul kemudian dihitung lalu dibandingkan dengan nilai Rf literatur untuk mengidentifikasikan senyawa yang terpisah. Hasil analisis kualitatif fraksi etil asetat dan fraksi metanol kulit jagung menunjukkan keberadaan senyawa fenolik. Hasil ini ditunjukkan dengan munculnya noda bercak dengan nilai Rf 0,75 yang memiliki kemiripan dengan nilai Rf asam galat (0,76). Kata kunci : Kulit jagung; Kromatografi lapis tipis; Analisis kualitatif. ABSTRACTCorn production keeps increasing causing increasing in corn husk waste. Cornhusk can be used in medical field and have potential as an antioxidant. Cornhusk contains phenol and flavonoid metabolites that can act as antioxidants. The aim of this study is to determine the presence of phenol metabolites in ethyl acetate and methanol fraction of cornhusk. Cornhusk extraction was carried out by a maceration method using ethanol 96%. Fractionation of ethanolic cornhusk extract was carried out by liquid-liquid extraction using a separating funnel with methanol and ethyl acetate solvent. The two fractions then analyzed qualitative by Thin Layer Chromatography. The stationary phase used is silica gel G60F254. The mobile phase used is a combination of chloroform: ethyl acetate: n-butanol: formic acid (5:2:2:1). The separation result marked by the presence of stains when observed by UV 254 nm and 366 nm light. The Rf value then measured and compared to Rf value in the literature to determine the separated substance. The qualitative analysis result of corn husk ethyl acetate fraction and methanol fraction indicated the presence of phenolic metabolites. This result is showed by the presence of stain with Rf value 0,75 that has similarity with Rf value of gallic acid (0,76). Keywords : Cornhusk; Thin layer chromatography; Qualitative analysis.

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