Qualitative analysis of some phenolic benzophenones and diphenylmethanes by thin-layer chromatography

1979 ◽  
Vol 170 (2) ◽  
pp. 495-497 ◽  
Author(s):  
Andrew W. Stocklinski ◽  
Jennifer L. Smith ◽  
Karen A. Knudson
Keyword(s):  
Qualitative Analysis ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Layer Chromatography

Investigation and Identification of the Bromination Products of Dimethoxyamphetamines

1976 ◽  
Vol 59 (5) ◽  
pp. 1162-1169
Author(s):  
Keith Bailey ◽  
Denise R Gagné ◽  
Richard K Pike
Keyword(s):  
Magnetic Resonance ◽  
Qualitative Analysis ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Infrared Spectra ◽  
Proton Magnetic Resonance ◽  
Positive Identification ◽  
Aromatic Bromination ◽  
Layer Chromatography ◽  
Magnetic Resonance Spectra

Abstract The qualitative analysis of the aromatic bromination products of the 6 isomeric dimethoxyamphetamines and their hydrochloride or hydrobromide salts is described. Their ultraviolet, mass, and proton magnetic resonance spectra are not sufficiently different for distinction but infrared spectra allow a positive identification to be made and reference spectra are provided for the bromination products of 2,4-, 2,5-, 2,6-, 4,5-, and 3,5-dimethoxyamphetamines. The application of gas-liquid and thin layer chromatography for the analysis of these products is discussed. The bromination of 2,3-dimethoxyamphetamine consistently gave mixtures which could not be separated satisfactorily; spectra are included for completeness of the comparison of products.

scholarly journals Chromatographical analysis of phenolic acids in some species of Polygonum L. genus. Part 1 Qualitative analysis by two-dimensional thin layer chromatography (TLC)

2014 ◽  
Vol 68 (4) ◽  
pp. 287-290 ◽  
Author(s):  
Helena D. Smolarz
Keyword(s):  
Qualitative Analysis ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Phenolic Acids ◽  
Column Chromatography ◽  
Two Dimensional ◽  
Chromatography Method ◽  
Polygonum Convolvulus ◽  
Hydroxybenzoic Acids ◽  
Layer Chromatography

The Two-Dimensional Thin Layer Chromatography method has been used for the separation and identification of phenolic acids from six taxons of <em>Pohygonum</em> L. genus. The following acids were found: caffeic, p-coumaric, ferulic, p-hydroxybenzoic, m-hydroxybenzoic, vanillic, syringic, p-hydroxyphenylacetic, o-hydroxyphenylacetic, synapic, melillotic, salicylic, gentisic, elagic, gallic, chlorogenic, protocatechuic and homoprotocatechuic. Gallic, ferulic, vanillic, p-coumaric and p-hydroxybenzoic acids were isolated from herb <em>Polygonum convolvulus</em> L. using column chromatography.

scholarly journals Qualitative Analysis of Rhodamine B in Shrimp Paste at Sumbawa Besar City Markets Using Thin Layer Chromatography

2021 ◽  
Vol 8 (2) ◽  
pp. 34
Author(s):  
Abby Rahmat Kamaruzzaman ◽  
Asri Darmawati ◽  
Djoko Agus Purwanto
Keyword(s):  
Qualitative Analysis ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Rhodamine B ◽  
Layer Chromatography ◽  
Rhodamin B

Terasi biasa diberi pewarna merah agar lebih menarik. Tahun 2013, pernah ditemukan Rhodamin B dalam produk terasi yang beredar di pasar kabupaten Sumbawa Barat. Rhodamin B adalah pewarna merah yang dilarang digunakan untuk makanan. Diantara berbagai produk terasi yang dijual di Sumbawa, terasi khas asli Sumbawa yaitu terasi Empang, perlu dijaga keamanannya agar dapat lebih dipromosikan. Tujuan penelitian ini adalah membuktikan bahwa terasi yang dijual pasar kota Sumbawa Besar tidak mengandung Rhodamin B. Metode yang digunakan untuk identifikasi Rhodamin B adalah kromatografi lapis tipis (KLT). Penelitian ini menggunakan silika gel 60 F254 sebagai fase diam dan fase gerak terpilih yaitu N-butanol:etil asetat:amonia 25% (10:4:5). Sampel adalah produk terasi yang dijual di Pasar Kota Sumbawa Besar, periode sampling bulan Februari dan Maret 2021. Preparasi sampel terasi dengan cara diekstraksi menggunakan etanol dan volume ekstrak yang ditotolkan pada lempeng KLT adalah 2 μl. Parameter validasi metode yang diuji adalah spesifisitas/selektifitas dan batas deteksi (LOD). Hasil penelitian menunjukkan metode ini spesifik untuk Rhodamine B yaitu Rf 0,69, profil spektra yang sama antara baku dan sampel yang diadisi Rhodamin B. Resolusi (Rs) antara noda Rhodamin B dengan noda terdekat lain dalam sampel adalah >1,5. Panjang gelombang serapan maksimum Rhodamin B adalah 544 nm. Nilai LOD sebesar 4,14 ng. Hasil identifikasi terhadap 10 sampel yang terdiri dari 3 sampel terdaftar di BPOM dan 7 sampel tidak terdaftar di BPOM tidak terdeteksi adanya Rhodamin B. Kesimpulan dari penelitian ini adalah semua sampel terasi yang dijual di pasar kota Sumbawa Besar tidak terdeteksi mengandung Rhodamin B.

Qualitative analysis of the herb fagopyrum sagittatum gilib grown in pot culture

2020 ◽  
pp. 63-68
Author(s):  
A. S. Soldatov ◽  
N. V. Nesterova ◽  
N. V. Biryukova
Keyword(s):  
Qualitative Analysis ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Phytochemical Study ◽  
Promising Source ◽  
Layer Chromatography ◽  
Pot Culture

This article is devoted to the phytochemical study of fresh and dried samples of buckwheat grass, the preparation of which was carried out from plants cultivated in pot culture using pharmacopoeial qualitative reactions. The presence of tannins and flavonoids was identified, and using the method of thin-layer chromatography, using GSO Rutin, rutin was identified, which allows us to consider potted buckwheat culture as a promising source of rutin production.

Simplified Qualitative Analysis of Glycerides Derived from Coconut Oil Using Thin Layer Chromatography

2012 ◽  
Vol 506 ◽  
pp. 182-185 ◽  
Author(s):  
Sirikarn Pengon ◽  
Chutima Limmatvapirat ◽  
Sontaya Limmatvapirat
Keyword(s):  
Acetic Acid ◽  
Qualitative Analysis ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Cocos Nucifera ◽  
Coconut Oil ◽  
Solvent System ◽  
Tlc Plates ◽  
Solvent Systems ◽  
Layer Chromatography

Coconut (Cocos nucifera L.) oil is composed predominately of medium-chain triglycerides which have been reported to be beneficial to human health. It also contains free fatty acids (FFAs) which can combine with glycerol to form monoglycerides, diglycerides, and triglycerides. The analysis of FFAs and their glycerides has been proposed to assess the quality of coconut oil used as raw materials in various industrial fields. The aim of this study was to develop the qualitative method for investigation of FFA and their glycerides in coconut oil using thin layer chromatography (TLC). Coconut oil and standards of FFA and their glycerides were chromatographed separately on Silica gel 60 F254 TLC plates using hexane: ether: acetic acid (60:40:1) and hexane: ethyl acetate: acetic acid (60:40:0.5) as solvent systems A and B, respectively. The spots on developing TLC plates were detected and compared using 254-nm UV light and iodine vapor. The results showed that the resolution of solvent system A was better than that of solvent system B. However, both solvent systems were used to confirm the results. The retention factor (Rf) values of the components were in good agreement with their polarity. This method should provide a guideline for qualitative analysis of coconut oil.

scholarly journals ANALISIS KUALITATIF FENILALANIN SECARA CHROMATOGRAPHY KERTAS DAN CHROMATOGRAPHY LAPIS TIPIS (Studi Awal Pengembangan Metode Deteksi Penyakit Phenylketonuria)

SAINSTIS ◽  
2013 ◽  
Author(s):  
Begum Fauziyah
Keyword(s):  
Qualitative Analysis ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Paper Chromatography ◽  
Layer Chromatography

<p>The qualitative analysis of fenilalanin as paper chromatography and thin layer chromatography is developed as the beginning study of detection phenylketonuria  disease.  The  result  of  identification  qualitatively fenilalanin     solution     with     concentration     varia tion     using     paper chromatography media shows that the clearest spot is gotten by concentration minimal 50 ppm. The result of identification qualitatively fenilalanin  solution  with  variation  concentration  1,  3,  5,  10,  25  and  50 (ppm) using thin layer chromatography shows that from the smallest concentration  that  is  1  ppm,  has  already  give  the  clear  qualitative experiment result, that is purple. Fenilalanin analysis with thin layer chromatography gives more sensitive result than with paper chromatography. memberikan hasil yang lebih sensitif daripada dengan chromatography kertas.</p>

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