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Journal articles on the topic 'Thin layer chromatography (TLC)'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Balu, Rathod* B. S. Bhosale Dr. Prachi Udapurkar Jaydip Nagane Dnyaneshwar Andhale. "Review On To Study Of Thin Layer Chromatography Of Tofacitinib Citrate." International Journal of Pharmaceutical Sciences 2, no. 7 (2024): 662–72. https://doi.org/10.5281/zenodo.12706367.

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Thin layer chromatography (TLC) was employed to study the properties and behavior of tofacitinib citrate. The aim was to develop a reliable method for the identification, separation, and analysis of this compound. The TLC technique involved using silica gel as the stationary phase and various solvent systems as the mobile phase. The results demonstrated that TLC is an effective analytical tool for monitoring the purity, identifying impurities, and assessing the stability of tofacitinib citrate. This study highlights the utility of TLC in the quality control and research of pharmaceutical compo

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Katayama, Yoshiki, and Shino Manabe. "Thin-layer chromatography（TLC）." Drug Delivery System 35, no. 2 (2020): 147–49. http://dx.doi.org/10.2745/dds.35.147.

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3

Verbitski, Sheryl M., Gerald T. Gourdin, Larissa M. Ikenouye, James D. McChesney, and Jana Hildreth. "Detection of Actaea racemosa Adulteration by Thin-Layer Chromatography and Combined Thin-Layer Chromatography-Bioluminescence." Journal of AOAC INTERNATIONAL 91, no. 2 (2008): 268–75. http://dx.doi.org/10.1093/jaoac/91.2.268.

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Abstract Actaea racemosa L. (black cohosh; syn. Cimicifuga racemosa L. Nutt.) is a native North American perennial whose root and rhizome preparations are commercially available as phytomedicines and dietary supplements, primarily for management of menopausal symptoms. Despite its wide use, methods that accurately identify processed A. racemosa are not well established; product adulteration remains a concern. Because of its similar appearance and growing locales, A. racemosa has been unintentionally mixed with other species of the genus, such as Actaea pachypoda Ell. (white cohosh) and more co

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4

Bober-Majnusz, Katarzyna, and Alina Pyka-Pająk. "Comparison of the Limit of Detection of Paracetamol, Propyphenazone, and Caffeine Analyzed Using Thin-Layer Chromatography and High-Performance Thin-Layer Chromatography." Processes 12, no. 6 (2024): 1153. http://dx.doi.org/10.3390/pr12061153.

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TLC (thin-layer chromatography) and HPTLC (high-performance thin-layer chromatography) in normal (NP) and reversed (RP) phase systems were combined with densitometry to analyze caffeine, propyphenazone, and paracetamol. This work aims to check whether comparable limit of detection (LOD) values can be obtained on TLC and HPTLC plates. Analyses were performed on five (NP) or four (RP) different stationary phases (chromatographic plates), testing, in both cases, three mobile phases. It is shown that by using both TLC and HPTLC plates, it is possible to develop chromatographic conditions that enab

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Renger, Bernd. "Contemporary Thin-Layer Chromatography in Pharmaceutical Quality Control." Journal of AOAC INTERNATIONAL 81, no. 2 (1998): 333–40. http://dx.doi.org/10.1093/jaoac/81.2.333.

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abstract The progress in layers, instrumentation, and the development of automated scanning densitometers have led to a remarkable improvement of the features of thin-layer chromatography (TLC) and especially its high performance version (HPTLC). Contemporary TLC or HPTLC combines the techniques' inherent advantages which include high sample throughput, simultaneous processing of standards and samples, flexibility, easy postchro matographic visualization techniques, and the ability to handle complex or crude samples with minimum sample cleanup—with improved selectivity, sensitivity, and accura

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6

Sherma, Joseph. "Recent Advances in Thin-Layer Chromatography of Pesticides." Journal of AOAC INTERNATIONAL 82, no. 1 (1999): 48–54. http://dx.doi.org/10.1093/jaoac/82.1.48.

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Abstract Advances in the use of thin-layer chromatography (TLC) and high-performance TLC (HPTLC) for separation, detection, and qualitative and quantitative determination of pesticides, other agrochemicals, and related compounds are reviewed for the period 1996–1998. Analyses are covered for avariety of food, biological, and environmental samples and for residues of various pesticides, including insecticides, herbicides, and fungicides, belonging to different chemical classes. References on formulation analysis, hydrophobicity studies, and use of TLC and thin-layer radiochromatography for stud

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Mohammad, Ali, Abdul Moheman, and Gaber El-Desoky. "Amino acid and vitamin determinations by TLC/HPTLC: review of the current state." Open Chemistry 10, no. 3 (2012): 731–50. http://dx.doi.org/10.2478/s11532-012-0019-0.

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AbstractSeveral methods to determine amino acids and vitamins in biological and pharmaceutical samples have been reported. Thin layer chromatography (TLC) finds its place when the relatively costly equipment required by other methods is unavailable. This review covers the 1991–2010 literature on TLC/HPTLC (high performance thin layer chromatography) amino acid and vitamin determinations. It gives an overview of the special features as well as the problems in TLC/HPTLC determinations of amino acids and vitamins. Various chromatographic systems useful in amino acid and vitamin identification, se

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Braselton, W. Emmett, and Malgorzata Johnson. "Thin Layer Chromatography Convulsant Screen Extended by Gas Chromatography-Mass Spectrometry." Journal of Veterinary Diagnostic Investigation 15, no. 1 (2003): 42–45. http://dx.doi.org/10.1177/104063870301500109.

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Acute onset convulsive disorders in the canine may result from exposure to a variety of toxicants including strychnine, insecticides, metaldehyde, zinc phosphide, methylxanthines, drugs of abuse, bromethalin, and the tremorgenic mycotoxins (roquefortine and penitrem A). Although several of the above can be identified in a single gas chromatography-mass spectrometry (GC-MS) screen most have to be determined by separate tests. This report describes a modification of the strychnine extraction procedure, which allows thin layer chromatographic (TLC) identification of strychnine, bromethalin, roque

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Komsta, Łukasz. "Chemometrics in Fingerprinting by Means of Thin Layer Chromatography." Chromatography Research International 2012 (November 28, 2012): 1–5. http://dx.doi.org/10.1155/2012/893246.

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The paper is written as an introductory review, presenting summary of current knowledge about chemometric fingerprinting in the context of TLC, due to a rather small interest in the literature about joining TLC and chemometrics. The paper shortly covers the most important aspects of the chemometric fingerprinting in general, creating the TLC fingerprints, denoising, baseline removal, warping/registering, and chemometric processing itself. References being good candidates as a starting point are given for each topic and processing step.

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Huang, Du Shu, Yun Hui Long, Yong Hong, Jing Wang, Na Wu, and Jie Wu. "Chiral Resolution of Ofloxacin Using Carboxylated Multi-Walled Carbon Nanotubes Mediated Thin-Layer Chromatography." Materials Science Forum 809-810 (December 2014): 128–30. http://dx.doi.org/10.4028/www.scientific.net/msf.809-810.128.

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To resolute chiral ofloxacin, we demonstrated a new method of using carboxylated multi-walled carbon nanotubes (MWCNTs) impregnated thin-lay chromatography (TLC). The relative RF value of carboxylated MWCNTs impregnated TLC was 31.3. A general discussion that focuses on the possibility of functionalized MWCNTs in the field of chromatographic chiral resolution is presented.

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Sherma, Joseph. "Recent Advances in Thin-Layer Chromatography of Pesticides." Journal of AOAC INTERNATIONAL 84, no. 4 (2001): 993–1000. http://dx.doi.org/10.1093/jaoac/84.4.993.

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Abstract Advances in the applications of thin-layer chromatography (TLC) and high-performance thin-layer chromatography (HPTLC) for the separation, detection, and qualitative and quantitative determination of pesticides, other agrochemicals, and related compounds are reviewed for the period 1998–2000. Analyses are covered for a variety of samples, such as food, biological, and environmental, and for residues of pesticides of various types, including insecticides, herbicides, and fungicides, belonging to different chemical classes. References on formulation analysis, hydrophobicity studies, and

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12

Castro-Suarez, John R., Luis A. Pérez-Almodóvar, Doris M. Laguer-Martínez, et al. "Explosives Analysis Using Thin-Layer Chromatography–Quantum Cascade Laser Spectroscopy." Molecules 30, no. 8 (2025): 1844. https://doi.org/10.3390/molecules30081844.

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A new hyphenated technique using thin-layer chromatography (TLC) to separate analytes in mixtures, coupled with mid-infrared (MIR) laser spectroscopy for identification and quantification, is presented. The method, which provides a means for rapid screening of analytes that is practical, low-cost, fast, robust, and reproducible, was tested using nitroaromatic and aliphatic nitro high explosives (HEs) as target analytes. HEs are anthropogenic contaminants containing an -NO2 group. For validation of the new technique, a direct comparison of the 2,4,6-trinitrotoluene (TNT) spectrum, obtained by a

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Švec, František. "Neglected Applications of Monolithic Structures: Advanced Thin Layer Chromatography-Mass Spectrometry Approaches." Chemické listy 117, no. 7 (2023): 395–406. http://dx.doi.org/10.54779/chl20230395.

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Thin-layer or planar chromatography (TLC) continues to evolve, albeit at a slower pace than its more powerful counterparts, liquid and gas chromatography. This is easy to understand as TLC has always been a very simple alternative to these methods without the need for complex instrumentation. This does not mean, however, that TLC cannot be combined with sophisticated detection methods such as mass spectrometry or performed in multiple dimensions. To make TLC more widely applicable, its separation potential is constantly being improved. Therefore, layers with new chemical compositions and innov

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14

Moschidis, Michael C. "Notizen: Isolation of Beef Brain Phosphonolipids by Thin Layer Chromatography: Their Identification and Silicic Acid Column Chromatographic Separation." Zeitschrift für Naturforschung C 41, no. 3 (1986): 369–74. http://dx.doi.org/10.1515/znc-1986-0323.

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The isolation and identification of the phosphonolipids from beef brain - right lobe, left lobe and cerebellum - is herein reported. The phosphonolipids were isolated by preparative thin layer chromatography (TLC) using the solvent system methanol/water (2:1, v/v) and identified preliminarily by TLC. The isolated phosphonolipids were subjected to silicic acid column chromatographic separation and the thus separated phosphonolipids were identified by TLC, nitrogen-phosphorus determinations and IR spectroscopy.

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Ilbeigi, Vahideh, and Mahmoud Tabrizchi. "Thin Layer Chromatography-Ion Mobility Spectrometry (TLC-IMS)." Analytical Chemistry 87, no. 1 (2014): 464–69. http://dx.doi.org/10.1021/ac502685m.

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16

Kato, Haruyasu, Yuji Nagai, Katsuhiko Yamamoto, and Yoshio Sakabe. "Determination of Polysorbates in Foods by Colorimetry with Confirmation by Infrared Spectrophotometry, Thin-Layer Chromatography, and Gas Chromatography." Journal of AOAC INTERNATIONAL 72, no. 1 (1989): 27–29. http://dx.doi.org/10.1093/jaoac/72.1.27.

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Abstract A method is presented for the detection of polysorbates (PSs) in 8 kinds of processed foods by colorimetric and thin-layer chromatographic (TLC) techniques. The PSs are extracted from processed foods with a mixture of methylene chloride and ethanol by using an Extrelut column. The extract is further purified by using a silica gel column. The PS extract is complexed with cobalt-thiocyanate (Cothiocyanate) reagent and is determined spectrophotometrically at 620 nm. The recoveries and coefficients of variation for 8 kinds of processed foods fortified with 0.1% PS 80 were 67.9-94.6% and 4

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17

Thatipelli, Sujith, Achintya Kumar Mandal, and Shakila Ramachandran. "Chemical Standards and HPTLC Finger Print Profiles of a Siddha Polyherbal Formulation - Kadukkai Legiyam." International Journal of Ayurvedic Medicine 12, no. 4 (2021): 922–26. http://dx.doi.org/10.47552/ijam.v12i4.2188.

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To study physico-chemical, phytochemical and high performance thin layer chromatography of a Siddha drug “Kadukkai Legiyam” (KL). The prepared Kadukkai Legiyam (KL) was prepared as per the standard operating procedures mentioned in literature. Then the drug was subjected to physicochemical parameters, phytochemical screening, thin layer chromatographic photo documentation (TLC), high performance thin layer chromatographic (HPTLC) finger print profile of hexane, chloroform, ethanol and hydro alcohol (1:1) extracts. Different extracts of the drug showed distinct TLC and HPTLC finger print patter

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18

Du Toit, Elsa S., Ilona Von Maltzahn, and Puffy Soundy. "Chemical Analysis of Cultivated Hypoxis hemerocallidea using Thin Layer Chromatography." HortScience 40, no. 4 (2005): 1119B—1119. http://dx.doi.org/10.21273/hortsci.40.4.1119b.

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Hypoxis hemerocallidea (African potato) is in high demand as a medicinal plant and therefore it is becoming scarce in its natural habitat. Thus, the objective of this study was to investigate the effect of cultivation practices on the active ingredients of the corm over a 12-month period. Different TLC (Thin Layer Chromatography) methods were also investigated when separating the different compounds. Plants were grown under a tunnel in plastic bags containing bark or sand growing media. The planted corms were treated with different fertigation frequencies and harvesting took place during four

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Henderson, M. J. "Thin-layer chromatography of free porphyrins for diagnosis of porphyria." Clinical Chemistry 35, no. 6 (1989): 1043–44. http://dx.doi.org/10.1093/clinchem/35.6.1043.

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Abstract In this simple thin-layer chromatographic (TLC) technique for evaluating porphyrin excretion, porphyrins are extracted from urine or feces, then separated on silica-gel TLC plates. The distinct porphyrin bands are observed by viewing the plates under long-wave fluorescent light. Positive screening tests can readily be confirmed or rejected, and a more comprehensive investigation confidently undertaken.

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20

Hofstraat, J. W., C. Gooijer, and N. H. Velthorst. "The Combination of High-Resolution Molecular Fluorescence Spectroscopy with Liquid Chromatography and Thin-Layer Chromatography." Applied Spectroscopy 42, no. 4 (1988): 614–19. http://dx.doi.org/10.1366/0003702884429229.

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Under certain conditions, highly specific fluorescence spectra, showing molecular vibrations as in infrared spectroscopy, can be obtained for the analysis of compounds separated in TLC and microbore LC. Two techniques, both employing low-temperature solid samples, are available: Shpol'skii spectroscopy and Fluorescence Line-Narrowing (FLN) spectroscopy. The former utilizes n-alkane solvents, which form regular, crystalline solids; the latter is based on selective laser excitation. Both techniques can be applied for detection in TLC. FLN is more feasible, since the Shpol'skii method requires sp

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Nicola, Anthony J., Arkady I. Gusev, and David M. Hercules. "Direct Quantitative Analysis from Thin-Layer Chromatography Plates Using Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry." Applied Spectroscopy 50, no. 12 (1996): 1479–82. http://dx.doi.org/10.1366/0003702963904458.

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Direct quantitative analysis using thin-layer chromatography (TLC) coupled with matrix-assisted laser desorption/ionization mass spectrometry (MALDI) has been demonstrated. An internal standard and a data collection protocol were used for analysis directly from TLC plates to compensate for shot-to-shot signal degradation, as well as deviations of analyte and internal standard spatial distributions within the TLC spot. Cocaine hydrochloride was used as a model compound for this study, and cocaine- d3 was used as the internal standard. Quantitative analysis by TLC/MALDI yielded comparable result

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Chong, K. P., J. W. Mansfield, M. H. Bennet, and J. F. Rossiter. "Detection of antifungal compounds in Arabidopsis thaliana and brassica oleracea by thin layer chromatography ." ASEAN Journal on Science and Technology for Development 23, no. 1&2 (2017): 123. http://dx.doi.org/10.29037/ajstd.99.

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Thin Layer Chromatography (TLC) was applied to detect antifungal compounds both in Arabidopsis thaliana and Brassica oleracea after elicited by various biotic and abiotic elicitors.From TLC bioassays the only strong zone of inhibition detected after challenged by Pseudomonas syringae pv.maculicola was from Arabidopsis tissue and later confirmed by spectrophotometry as camalexin but no corresponding phytoalexin was found in broccoli leaf.

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Anindita, Reza, Gita Cahya Pratama, Intan Kurnia Putri, Maya Uzia Beandrade, and Chilyati Eky Futihat. "Botanical, Pharmacognosy, and Phytochemical Studies of Sintrong Leaves (Crassocephalum crepidioides) Growing in Tanjung Setia Village, West Coast, Lampung." Jurnal Ilmiah Biologi Eksperimen dan Keanekaragaman Hayati (J-BEKH) 12, no. 1 (2025): 81–94. https://doi.org/10.23960/jbekh.v12i1.423.

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Crassochepalum crepidioides plant has antibacterial and anti-wound properties. This study aims to determine the botanical profile, microscopic powder, phytochemical screening, and Thin Layer Chromatography (TLC). This study aims to determine the morphology of leaves, stems, roots, microscopic powder, phytochemical screening, and Thin Layer Chromatography (TLC) of C. crepidioides leaves from Tanjung Setia Village West Coast Lampung, Indonesia. Methods include morphological examination, microscopic powder, phytochemical screening, and TLC. The results of the botanical show oval-shaped leaves, po

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Ahmad, Musonnifin Aziz, Alfi Syahriyah Farikha, Ihya' Ulumuddin Ahmad, and A'yuni Qurrota. "ISOLASI FITOSTEROL DARI BAWANG MERAH (Allium cepa L.)." Journal of Research and Technology 5, no. 1 (2019): 50–58. https://doi.org/10.5281/zenodo.3459430.

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Shallot is one of the kitchen spices that is often used by the community. Shallot contains several useful compounds and one of them is phytosterol. Along with the development of science and technology, phytosterol can be used to reduce blood cholesterol levels and prevent heart disease, so it is very beneficial for human health. In this study, phytosterol compounds were identified and isolated. The dried onion was then pureed and sifted to 100 mesh. The sieved powder was then extracted by reflux extraction method within 6 hours. The results of the extract were then isolated by column chromatog

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Sherma, Joseph. "Recent Advances in the Thin-Layer Chromatography of Pesticides: A Review." Journal of AOAC INTERNATIONAL 86, no. 3 (2003): 602–11. http://dx.doi.org/10.1093/jaoac/86.3.602.

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Abstract Advances in the applications of thin-layer chroma-tography (TLC) and high-performance TLC for the separation, detection, identification, and determination of pesticides, other agrochemicals, and related compounds are reviewed for the period 2000–2002. Analyses are described for a variety of samples, such as food, biological, and environmental samples, and for residues of pesticides of various types, including insecticides, herbicides, and fungicides, belonging to different chemical classes. References are included for residue analysis, hydrophobicity studies, and the use of TLC and th

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Russo, Roberto, and Remo Reggiani. "Rapid separation of seed glucosinolates from Camelina sativa by thin layer chromatography." International Journal of Plant Biology 3, no. 1 (2012): 4. http://dx.doi.org/10.4081/pb.2012.e4.

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A thin layer chromatography (TLC) method has been developed for the quantitative analysis of glucosinolates extracted from <em>Camelina sativa</em>. This procedure resolves the same long-chain glucosinolates as high-performance liquid chromatography but increases simultaneous sample size to 18. The TLC method saves time and solvent, and can be applied to screening of <em>Camelina</em>.

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A, Kolawole Jacob, and Bana DJ. "Comparative Evaluation of the Physicochemical and In Vitro Dissolution Properties of Some Expired and Unexpired Brands of Metformin Tablets." Der Pharma Chemica 15, no. 1 (2023): 9. https://doi.org/10.5281/zenodo.13318759.

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The comparative evaluation of the physicochemical properties and in vitro dissolution of some expired and unexpired brands of metformin tablets, six brands of expired (serial 1)and also unexpired (serial 2) of the same brand were used. The samples were determined using thin layer chromatography (TLC). Pharmacopoeia tests such as uniformity of weight, hardness, friability and assay were used to assess the physicochemical equivalence of the expired and unexpired metformin tablet brands. In vitro dissolution testing was conducted for both the expired and the unexpired tablets. All the brands (exp

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Jacob, A. Kolawole, and DJ Bana. "Comparative Evaluation of the Physicochemical and In Vitro Dissolution Properties of Some Expired and Unexpired Brands of Metformin Tablets." DER PHARMA CHEMICA 15, no. 1 (2023): 9. https://doi.org/10.4172/0975-413X.15.1.21-29.

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The comparative evaluation of the physicochemical properties and in vitro dissolution of some expired and unexpired brands of metformin tablets, six brands of expired (serial 1)and also unexpired (serial 2) of the same brand were used. The samples were determined using thin layer chromatography (TLC). Pharmacopoeia tests such as uniformity of weight, hardness, friability and assay were used to assess the physicochemical equivalence of the expired and unexpired metformin tablet brands. In vitro dissolution testing was conducted for both the expired and the unexpired tablets. All the brands (exp

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Kolawole, Jacob A., and DJ Bana. "Comparative Evaluation of the Physicochemical and In Vitro Dissolution Properties of Some Expired and Unexpired Brands of Metformin Tablets." Der Pharma Chemica 15, no. 1 (2023): 9. https://doi.org/10.5281/zenodo.10934596.

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The comparative evaluation of the physicochemical properties and in vitro dissolution of some expired and unexpired brands of metformin tablets, six brands of expired (serial 1)and also unexpired (serial 2) of the same brand were used. The samples were determined using thin layer chromatography (TLC). Pharmacopoeia tests such as uniformity of weight, hardness, friability and assay were used to assess the physicochemical equivalence of the expired and unexpired metformin tablet brands. In vitro dissolution testing was conducted for both the expired and the unexpired tablets. All the brands (exp

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Fortes, Paulo Jordão de Oliveira Cerqueira, Nelson Leal Alencar, Livio Cesar Cunha Nunes, et al. "CANNABIS THIN LAYER CHROMATOGRAPHY (TLC) CHEMO TYPING: HOW ACCURATE IS TLC COMPARED TO HIGH PRESSURE LIQUID CHROMATOGRAPHY?" Revista Contemporânea 3, no. 10 (2023): 19702–24. http://dx.doi.org/10.56083/rcv3n10-164.

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Problem: Brazilian Cannabis Associations (BCA) search for methods of reducing their costs and increasing their quality control of Cannabis spp. Oil and extracts. The significant difficulties presented by ABRACAM (Associação Brasileira Cannabis Medicinal) to UFPI professors were to standardize cannabinoids profiles of its plants and guarantee the same levels of cannabinoids on its artisanal extracts. ABRACAM has difficulty standardizing plant cannabinoids profiles due to Cannabis spp. Phenotypic plasticity, or the ability of Cannabis spp. to change attributes like the size of leaves, levels of

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Upton, Roy T. "Use of High-Performance Thin Layer Chromatography by the American Herbal Pharmacopoeia." Journal of AOAC INTERNATIONAL 93, no. 5 (2010): 1349–54. http://dx.doi.org/10.1093/jaoac/93.5.1349.

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Abstract TLC characterizations are among the key identity tests in most pharmacopoeial monographs. Pharmacopoeial standards are typically used by industry as a basis for meeting QC requirements and current good manufacturing practices (cGMPs). TLC is a relatively low-cost, highly versatile tool for developing specifications for raw materials, as well as for the various preparations for which pharmacopoeial standards are created. In addition to its use in the development of identity tests, TLC is a valuable tool for screening plant samples that pharmacopoeias must review in the development of m

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Hameed, Khalid, Muhammad Shoaib Khan, Ayesha Fatima, Syed Mudassir Shah, and Muhammad Ali Abdullah. "Exploring the World of Thin-Layer Chromatography: A Review." Asian Journal of Applied Chemistry Research 14, no. 3 (2023): 23–38. http://dx.doi.org/10.9734/ajacr/2023/v14i3268.

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A common analytical method in chemistry for separating and identifying mixture ingredients is called thin-layer chromatography (TLC). A thin coating of stationary phase, often silica gel or alumina, is put into a sample, which is then placed on a flat substrate like a glass plate. The sample is then exposed to a mobile phase, often a solvent, that follows capillary action through the stationary phase. Thin-layer chromatography may be used to determine the chemicals that are present in a particular sample and track the development of a reaction. Additionally, similar substances in a mixture may

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Aginsky, Valery N. "Thin-Layer Chromatography of Inks— Efficiency of Separation of Ink Components." Journal of the American Society of Questioned Document Examiners 22, no. 2 (2019): 13–21. https://doi.org/10.69525/jasqde.259.

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There are numerous publications relating to the use of thin-layer chromatography (TLC) in the analysis of inks on documents. This paper compares the efficiencies of TLC separation of ink components when using several ‘developing’ solvents (solvent systems) commonly used for ink analysis in the forensic laboratory. The parameters chosen for this evaluation are the shape of and distance between chromatographic zones of separated dye components of ink, including components of Methyl Violet, a dye mixture often used in the manufacture of black, violet and blue ballpoint, fountain pen, and stamp pa

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Fauziah, Sri, Puput Melati, Ade Heri Mulyati, Mohamad Rafi, and Eti Rohaeti. "Thin Layer Chromatography Fingerprint Analysis of Tempuyung (Sonchus arvensis L.)." Jurnal Kimia Sains dan Aplikasi 26, no. 5 (2023): 187–93. http://dx.doi.org/10.14710/jksa.26.5.187-193.

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Thin layer chromatography (TLC) fingerprint profile analysis can be used for quality control of herbal medicinal raw materials through identification, authentication, and discrimination. This study aims to develop a fingerprint analysis method for tempuyung TLC (Sonchus arvensis L.), which is then used for quality control. Tempuyung was extracted with methanol using ultrasonication which was then analyzed using the developed fingerprint TLC method. The optimum mobile phase used to separate compounds from tempuyung was a composition of chloroform: ethyl acetate: dichloromethane: formic acid (7.

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Anirudh, Padiyar Rajesh Kumar Maheshwari Ruchika Mourya Love Pathak Priti Kumari Yadav Sakshi Deshmukh Sonali Sulya. "Enhanced Thin-Layer Chromatography of Amino Acids Using Mixed Hydrotropic Solutions." International Journal of Pharmaceutical Sciences 2, no. 11 (2024): 1541–47. https://doi.org/10.5281/zenodo.14244007.

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The number of components in a mixture, the identity and purity of a compound, the status of a reaction, the composition of the solvent used for preparative separations, and the analysis of the fractions obtained from column chromatography are all feasible quickly, sensitively, and affordably with thin layer chromatography (TLC). In TLC, the mobile phase travels upward with the aid of capillary action in the finely separated stationary phase. Despite the use of organic solvents can be perilous, normal phase TLC often uses organic (non-Polar) solvents such as benzene, 1-2 dichloroethane, carbon

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Jaiswal, A. K. "STANDARD OPERATING PROCEDURE (SOP) FOR THIN LAYER CHROMATOGRAPHY (TLC)." International Journal of Medical Laboratory Research 06, no. 02 (2021): 69–74. http://dx.doi.org/10.35503/ijmlr.2021.6210.

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Pant, Deepak. "Waste glass as absorbent for thin layer chromatography (TLC)." Waste Management 29, no. 7 (2009): 2040–41. http://dx.doi.org/10.1016/j.wasman.2009.03.023.

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Agatonovic-Kustrin, Snezana, and David W. Morton. "The Power of HPTLC-ATR-FTIR Hyphenation in Bioactivity Analysis of Plant Extracts." Applied Sciences 10, no. 22 (2020): 8232. http://dx.doi.org/10.3390/app10228232.

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Given the simplicity in sample preparation and application, thin-layer chromatography (TLC) and high-performance thin-layer chromatography (HPTLC) as its most enhanced form are commonly used to separate and identify complex mixtures in solution [...]

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Liu, Xing Rong, Jian Zheng, Dao Chen Zhu, and Yuan Mei Chen. "Determination of Puerarin and Daidzin from Pueraria Root Based on Chromatography." Advanced Materials Research 524-527 (May 2012): 2273–77. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.2273.

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Combine thin layer chromatography ( TLC ) with high performance liquid chromatography ( HPLC ) detection of kudzu root isoflavones, to establish a rapid and accurate method to determine the component content of Puerarin and daidzin in Radix Puerariae.Though study on the optimization analysis of Puerarin Content in Radix Puerariae and daidzin content chromatography in a variety of conditions, including TLC developing solvent and options of coloration, and HPLC chromatographic separation conditions and detection characteristics of TLC and HPL, to get the best Chromatographic separation condition

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Krzynowek, Judith, and Laurie J. Panunzio. "Practical Application of Thin-Layer Chromatography for Detection of Polyphosphates in Seafood." Journal of AOAC INTERNATIONAL 78, no. 5 (1995): 1328–32. http://dx.doi.org/10.1093/jaoac/78.5.1328.

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Abstract The practical application of previously published thin-layer chromatographic (TLC) methods to polyphosphate detection in seafood was determined. Exogenous polyphosphates are distinguishable from naturally occurring phosphates by using TLC; their detection can be enhanced by sampling techniques. Polyphosphates will eventually hydrolyze to monophosphates and make detection virtually impossible. Hydrolysis and therefore, nondetection, is accelerated by certain commercial practices. Results indicate that TLC detection of added phosphates can be used as an inspection tool for fresh product

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Saibaba, S. V., and P. Shanmuga Pandiyan. "High Performance Thin Layer Chromatography: A Mini Review." Volume 2, Issue 4: October 2016 – December 2016 2, no. 4 (2016): 219–26. http://dx.doi.org/10.32463/rphs.2016.v02i04.43.

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High Performance Thin layer Chromatography (HPTLC) technique is a sophisticated and automated form of the thin-layer chromatography (TLC) with better and advanced separation efficiency and detection limits, and is often an excellent alternative to GC and HPLC. Applications of HPTLC include phytochemical and biomedical analysis, herbal drug quantification, active ingredient quantification, fingerprinting of formulations, and check for adulterants in the formulations. HPTLC is useful in detecting chemicals of forensic concern. Various advance techniques in reference to HPTLC like hyphenations in

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Ustyugova, Anna O., Elena G. Sumina, Varsenia Z. Uglanova, and Olga N. Novozhilova. "Thin-layer chromatography of L-carnitine in micellar and cyclodextrin mobile phases." Butlerov Communications 58, no. 5 (2019): 62–69. http://dx.doi.org/10.37952/roi-jbc-01/19-58-5-62.

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L-carnitine (lat. Levocarnitinum, eng. Levocarnitine) is a natural substance akin to B vitamins. Normalizing metabolic processes in the human body and having a wide range of therapeutic actions, L-carnitine is widely used in cardiology, neurology, gastroenterology, and sports medicine. Currently, modern analytical techniques, such as mass spectrometry, high performance liquid chromatography, radiation methods, etc., are used to analyze L-carnitine. Most of them are rather expensive and time consuming. Thin-layer chromatography (TLC), which is notable for its simplicity, feasibility of analysis

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Cserháti, Tibor, and Esther Forgács. "Structure-Retention Relationships and Physicochemical Characterization of Solutes in Thin-Layer Chromatography." Journal of AOAC INTERNATIONAL 81, no. 6 (1998): 1105–8. http://dx.doi.org/10.1093/jaoac/81.6.1105.

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Abstract This review enumerates and critically evaluates experimental methods and calculation procedures used to elucidate the molecular basis of thin-layer chromatography (TLC) separations in both adsorption and reversed-phase modes. It addresses the quantitative relationship between molecular structure and retention and the determination of the solute physicochemical parameters by TLC.

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Kamal, Saidakbarovich Rizaev, Abidovich Yuldashev Zakirjan, Ismatovna Nurmatova Malokhat, Inoevna Primukhamedova Khilola, and Shoydilovich Fayzullaev Asliddin. "Elaboration of the Analysis Method of Ketamine Isolated from Biological Fluids Using Ultraviolet Spectrophotometry." International Journal of Current Science Research and Review 06, no. 05 (2023): 2837–41. https://doi.org/10.5281/zenodo.7923753.

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Abstract : The article is devoted to the results of studies on the development of thin–layer chromatography (TLC) and UV–spectrophotometry analysis methods and introduction of ketamine to the determination of the substance extracted from the composition of biological fluids. The methods developed during the research were applied to the analysis of ketamine extracted from biological fluids and positive results were obtained.

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Eskundari, R. D., A. Purwanto, N. R. Hanik, T. Wiharti, and S. H. Wardoyo. "Thin layer chromatography analysis and antibacterial activity of ecoenzyme solution." BIS Health and Environmental Science 1 (October 20, 2024): V124015. https://doi.org/10.31603/bishes.26.

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Ecoenzyme is known as fermented organic garbage solution that can be used for everyday purposes for example as organic liquid fertilizer and antiseptic. Until now, no information has been reported yet regarding further phytochemical tests and antibacterial activity of ecoenzyme solution. Based on these facts, it was deemed necessary to carry out this research in order to obtain scientific information regarding phytochemical activity using thin layer chromatography (TLC) as well as antibacterial activity contained in ecoenzyme solution. Initial screening for phytochemical content was carried ou

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Sârbu, Costel. "Use of Fuzzy Regression for Calibration in Thin-Layer Chromatography/Densitometry." Journal of AOAC INTERNATIONAL 83, no. 6 (2000): 1463–67. http://dx.doi.org/10.1093/jaoac/83.6.1463.

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Abstract A new fuzzy regression algorithm was successfully applied to calibration in thin-layer chromatography (TLC)/densitometry. Different regression techniques were also considered, and objective quality coefficients were used for evaluation of the results. Depending on the structure of the data, the fuzzy procedure can improve the results dramatically. From the results reported in this paper and other unpublished results, it appears clear that the calibration procedure based on fuzzy regression is the most suitable regression method in quantitative TLC.

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Kamalu, Garba Sulaiman, Suraja Ibrahim Abubakar, and Rabi'u Doguwa Aminu. "Phytochemicals Investigation, Chromatographic Evaluation and Antioxidant Activity Assay on the Root Extract of Carrot (Daucus carota)." International Journal of Novel Research in Physics Chemistry & Mathematics 9, no. 3 (2022): 61–65. https://doi.org/10.5281/zenodo.7307749.

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<strong>Abstract</strong><strong>:</strong> Daucus carota roots  were chosen for this study in order to examine both their phytochemicals and antioxidant activity (free radical scavenging activity). Ethanol was used to extract the plant's roots' powder sample. n-hexane, chloroform, ethyl acetate, and methanol were used to macerate the crude ethanol extract, which was then screened for alkaloids, flavonoids, saponins, tannins, and water-soluble phenols. Thin Layer Chromatography (TLC) analysis was performed on the crude extract as well as on the other fractions. For the optimum sep

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Fong, Andrew, and Gary M. Hieftje. "Near-IR Spectroscopic Examination of Thin-Layer Chromatography Plates in the Diffuse Transmittance Mode." Applied Spectroscopy 48, no. 3 (1994): 394–99. http://dx.doi.org/10.1366/0003702944028317.

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The nondestructive detection of analyte spots on high-performance thin-layer chromatography (HPTLC) plates is demonstrated with the use of near-IR spectrometry (NIRS). The resulting hyphenated technique is called Thin-Layer Chromatography-Near-Infrared Spectrometry (TLC-NIRS). A transmittance geometry is employed, and a set of 18 interference filters is used for wavelength selectivity. Plate-thickness nonuniformity and varying amounts of water vapor adsorption onto the silica-gel TLC plates were found to be the major complications. Variations in silica-gel thickness could be compensated for by

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Whitaker, T. B., J. W. Dickens, and A. B. Slate. "Computerized System to Quantify Aflatoxin Using Thin Layer Chromatography1." Peanut Science 17, no. 2 (1990): 96–100. http://dx.doi.org/10.3146/i0095-3679-17-2-12.

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Abstract A microcomputer was interfaced to an instrument (spotmeter) previously designed to measure the fluorescent intensity of aflatoxin spots on thin layer chromatography (TLC) plates. Software was developed that uses a cubic regression equation to describe the relationships between the spotmeter readings and the known quantities of aflatoxin in standard spots on TLC plates. The regression technique also provides methods to detect spotting and/or measurement errors. Based on the regression equation and measurements of sample extract spots on the same TLC plate, the system computes and recor

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Pyka, Alina, Marika Budzisz, and Małgorzata Dołowy. "Validation Thin Layer Chromatography for the Determination of Acetaminophen in Tablets and Comparison with a Pharmacopeial Method." BioMed Research International 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/545703.

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Adsorption thin layer chromatography (NP-TLC) with densitometry has been established for the identification and the quantification of acetaminophen in three leading commercial products of pharmaceutical tablets coded as brand: P1 (Productno. 1), P2 (Productno. 2), and P3 (Productno. 3). Applied chromatographic conditions have separated acetaminophen from its related substances, namely, 4-aminophenol and and 4′-chloroacetanilide. UV densitometry was performed in absorbance mode at 248 nm. The presented method was validated by specificity, range, linearity, accuracy, precision, detection limit,

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