Academic literature on the topic 'Thin-Layer- Chromatography High accuracy'

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Journal articles on the topic "Thin-Layer- Chromatography High accuracy"

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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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Yegorova, A., Yu Scrypynets, G. Fedosenko, G. Maltsev, and S. Kashutskiy. "Practical application of high-performance liquid chromatography and high-performance thin-layer chromatography in pharmaceutical analysis." Zurnal Hromatograficnogo tovaristva 21, no. 67 (2021): 46–55. http://dx.doi.org/10.15407/zht2021.67.046.

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Currently, chromatographic methods are widely used to control the quality of products in the pharmaceutical and food industries. This article is devoted to the systematization of the results of scientific research of the authors on the development, validation and application of a number of chromatographic methods in the creation of generic drugs, as well as in the analysis of medicinal plant materials. The developed methods are validated according to the following parameters: specificity, linearity, accuracy and limit of detection. The specificity of the methods is based on the ability to eval
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Komal N. Pawar, Komal N. Pawar, Sandhya P. Kadam Sandhya P. Kadam, and Dr VivekkumarK Redasani Dr.VivekkumarK.Redasani. "A Systematic Review on High Performance Thin Layer Chromatography (HPTLC)." International Journal of Pharmaceutical Research and Applications 10, no. 3 (2025): 402–16. https://doi.org/10.35629/4494-1003402416.

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High-Performance Thin Layer Chromatography (HPTLC) is a sophisticated analytical tool that has transformed the science of separation science through its greater sensitivity, resolution, and reproducibility over the conventional Thin Layer Chromatography (TLC). This systematic review delves into the concept, instrumentation, methodological innovation, and vast applications of HPTLC in pharmaceuticals, herbal drugs, food, forensic science, and biotechnology. The review highlights the most important innovations in automation, detection, derivatization, and hyphenation with mass spectrometry and F
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Yegorova, A., Yu Loskutova, G. Voitiuk, A. Maltsev, E. Malinka, and Yu Scrypynets. "Determination of curcumin in bouillon cubes by high-performance thin-layer chromatography." Zurnal Hromatograficnogo tovaristva 20, no. 66 (2021): 4–14. http://dx.doi.org/10.15407/zht2020.66.004.

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Currently, high-performance thin-layer chromatography (HPTLC) is widely used to control product quality in the pharmaceutical and food industries. In the manufacture of food products, the most important requirement is the control of the content of various additives (preservatives, dyes, antioxidants). For the first time, a method for determining curcumin by high-performance thin-layer chromatography in bouillon cubes "Gallina Blanca" was proposed. Detection was carried out by densitometric scanning using CAMAG equipment when measuring absorbance at a wavelength 265 nm. The method is based on d
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Dr., W.D.Sam Solomon, Priyadharshini.R, K.Hemamalini, S.Priyavagini, K.R.Anjana, and V.Karnan. "Estimation of Piracetam in Bulk and Formulation Using High Performance Thin-Layer Chromatography." International Journal of Innovative Science and Research Technology 8, no. 3 (2023): 2052–55. https://doi.org/10.5281/zenodo.7807241.

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A rapid, accurate and precise HPTLC method has been developed for the estimation of Piracetam in bulk and Pharmaceutical formulation. In this method standard and sample solutions of Piracetam were applied on pre-coated 6 x 10 silica gel 60F254 TLC plate, and developed using chloroform: methanol:glacial acetic acid: triethyl amine (16:4:0.2:0.2) as mobile phase. A Camag HPTLC system comprising of Camag Linomat -5-applicator, Camag twin trough chamber, Camag TLC-3 scanner was used for the analysis. The drugs on the plate were scanned at 254 nm. The dynamic linearity range was 2µl, 4µ
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Kowalczuk, Dorota. "Simultaneous High-Performance Thin-Layer Chromatography Densitometric Assay of Trandolapril and Verapamil in the Combination Preparation." Journal of AOAC INTERNATIONAL 88, no. 5 (2005): 1525–29. http://dx.doi.org/10.1093/jaoac/88.5.1525.

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Abstract A high-performance thin-layer chromatography (TLC) method coupled with densitometric analysis has been developed for simultaneous measurement of trandolapril (TRA) and verapamil (VER) in 2-component mixtures and in their combination capsules. The active substances were extracted from capsules withmethanol (mean recovery: 103.4% for TRA, 97.13% for VER) and chromatographed on TLC plates coated with silica gel 60 F254 in horizontal chambers with ethyl acetate–ethanol–acetic acid (8 + 2 + 0.5, v/v) mobile phase. Chromatographic separation of these components was followed by ultraviolet d
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Mrunal D. Thakare and M.D. Game. "Validated HPTLC method development, comparative evaluation and stability study for berberine in herbal preparations." GSC Biological and Pharmaceutical Sciences 27, no. 2 (2024): 281–96. http://dx.doi.org/10.30574/gscbps.2024.27.2.0186.

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The study focusing on the development and validation of a high-performance thin-layer chromatography (HPTLC) method for quantifying berberine in pharmaceutical formulations. Various chromatographic parameters were optimized to ensure precise and reproducible results, including mobile phase composition, linearity range, detection wavelength, and spot characteristics. The method demonstrated high accuracy and linearity within the concentration range of 5 - 35 µg/mL, with a determined Rf value of 0.52±0.02 for berberine. Additionally, stability studies revealed that berberine underwent degradatio
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Mrunal, D. Thakare, and Game M.D. "Validated HPTLC method development, comparative evaluation and stability study for berberine in herbal preparations." GSC Biological and Pharmaceutical Sciences 27, no. 2 (2024): 281–96. https://doi.org/10.5281/zenodo.12541039.

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The study focusing on the development and validation of a high-performance thin-layer chromatography (HPTLC) method for quantifying berberine in pharmaceutical formulations. Various chromatographic parameters were optimized to ensure precise and reproducible results, including mobile phase composition, linearity range, detection wavelength, and spot characteristics. The method demonstrated high accuracy and linearity within the concentration range of 5 - 35 µg/mL, with a determined Rf value of 0.52±0.02 for berberine. Additionally, stability studies revealed that berberine underwe
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Edward Raju Gope, Shaik Munnisha Begum, Pujitha Prayer Anisetti, et al. "A Review of Principles, Applications, and Recent Developments in HPTLC and HPLC." Journal of Pharma Insights and Research 2, no. 6 (2024): 056–64. https://doi.org/10.69613/315vge42.

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High-Performance Thin Layer Chromatography (HPTLC) and High-Performance Liquid Chromatography (HPLC) represent fundamental analytical techniques in modern chemical analysis. These sophisticated separation methods have revolutionized the field of analytical chemistry through their precision, reliability, and versatility. HPTLC, an enhancement of traditional thin-layer chromatography, offers advantages such as minimal sample preparation, simultaneous analysis of multiple samples, and cost-effectiveness. It has found extensive applications in pharmaceutical analysis, natural product research, and
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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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Dissertations / Theses on the topic "Thin-Layer- Chromatography High accuracy"

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Ofori, Hayford. "Characterisation of sandalwood essential oils using high performance thin-layer chromatography and high resolution gas chromatography mass spectrometry." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2020. https://ro.ecu.edu.au/theses/2326.

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Sandalwood essential oil is extensively used in perfumes, cosmetics, and pharmaceuticals. The unique woody aroma of sandalwood essential oil is produced by (Z)-α-santalol and (Z)-β-santalol and these two compounds influence the oil quality. Variation in sesquiterpene composition and oil yield have been observed both within and across Santalum species. Gas Chromatography-Mass Spectrometry (GC-MS) is a technique commonly used to identify and quantify sesquiterpene compounds in sandalwood essential oils. High Performance Thin-Layer Chromatography (HPTLC) has yet to be fully explored as an alterna
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Yeager, Barry Todd. "New detection techniques in high performance thin layer chromatography and related studies." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187353.

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Recently, high performance thin layer chromatography, or HPTLC has seen considerable growth as an analytical technique. Most often perceived as a semi-quantitative or preliminary technique, in reality HPTLC is an analytical technique in its own right. Modern instrumentation, improved stationary phases, and automated techniques have found their way into the realm of HPTLC, vastly improving the scope of the technique. Today, HPTLC is a very popular analytical technique, possessing many advantages such as ease of use, high throughput, high sensitivity, and low cost. HPTLC is also applicable to a
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Arruda, Frommenwiler Débora. "Comprehensive high performance thin layer chromatography (HPTLC) fingerprinting in quality control of herbal drugs, preparations and products." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/671745.

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Quality control of herbals has its roots in the study of morphoanatomic and organoleptic characters. Nevertheless, in the last century, with the evolution of analytical chemistry, the quality control rapidly evolved from elementary tests to the use of sophisticated instruments combined with software for data management. In the current days, many authorities and organizations recommend a suite of tests, featuring many of these instruments, to evaluate quality of herbal products. HPTLC offers a comprehensive set of data that can be used not only for identification but also to evaluate the purity
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Hebron, Mwalwisi Yonah [Verfasser], Ulrike [Gutachter] Holzgrabe, Petra [Gutachter] Högger, and Lorenz [Gutachter] Meinel. "Assessment of Counterfeit and Substandard Antimalarial Medicines using High Performance Thin Layer Chromatography and High Performance Liquid Chromatography / Yonah Hebron Mwalwisi ; Gutachter: Ulrike Holzgrabe, Petra Högger, Lorenz Meinel." Würzburg : Universität Würzburg, 2018. http://d-nb.info/115509803X/34.

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Cleary, Maryanne Viola. "Quantitative HPTLC." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-07112009-040558/.

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Alpmann, Alexander [Verfasser], and Wolfgang [Akademischer Betreuer] Schwack. "Trace analysis of acrylamide by high-performance thin-layer chromatography coupled to mass spectrometry / Alexander Alpmann. Betreuer: Wolfgang Schwack." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2012. http://d-nb.info/1027353053/34.

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Colthup, Philip Victor. "Assessment of the value of high-performance thin-layer chromatography for the detection and characterisation of drugs and metabolites in biological fluids." Thesis, Liverpool John Moores University, 1993. http://researchonline.ljmu.ac.uk/4941/.

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Nassif, Lana Amine. "The Production of 2-Keto-L-Gulonic Acid by Different Gluconobacter Strains." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/30590.

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Vitamin C is industrially produced by the Reichstein method, which uses gluconobacters to oxidize sorbitol to sorbose then a chemical process to convert sorbose to 2-keto-L-gulonic acid (2-KLG). The establishment of a more extensive microbial process for 2-KLG production translates into a less expensive and more efficient production of vitamin C. I examined pure strains and mixed cultures for their ability to produce 2-KLG using thin layer and high performance liquid chromatography. The DSM 4027 mixed culture produced the highest yield, 25 g/L, of 2-KLG from 100 g/L of sorbose, while the gram-
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Barret, Laurie-Anne. "Influence des tensioactifs dans la cristallisation du complexe photosynthétique RC-LH1-pufX de Rhodobacter blasticus." Phd thesis, Université d'Avignon, 2013. http://tel.archives-ouvertes.fr/tel-01017895.

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Ce projet vise à étudier, par une approche pluridisciplinaire, l'influence des la cristallisation des protéines membranaires (PM) en prenant pour protéine modèle le complexe photosynthétique RC-LH1-pufX de Rhodobacter blasticus. Des cristaux de ce complexe avaient été obtenus en présence de dodécyl-!-maltoside (DDM) et avaient diffractés à 8 Å de résolution. L'objectif final est de pouvoir améliorer, de façon rationnelle, la qualité des cristaux du complexe RC-LH1-pufX grâce à une meilleure compréhension des mécanismes mis en jeu. Dans un premier temps, trois tensioactifs dérivés du DDM ont ét
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Hebron, Mwalwisi Yonah. "Assessment of Counterfeit and Substandard Antimalarial Medicines using High Performance Thin Layer Chromatography and High Performance Liquid Chromatography." Doctoral thesis, 2018. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-145821.

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Although the prevalence of substandard and counterfeit pharmaceutical products is a global problem, it is more critical in resource-constrained countries. The national medicines regulatory authorities (MNRA) in these countries have limited resources to cater for regular quality surveillance programmes aimed at ensuring that medicines in circulation are of acceptable quality. Among the reasons explained to hinder the implementation of these strategies is that compendial monographs are too complicated and require expensive infrastructures in terms of environment, equipment and consumables. In th
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Books on the topic "Thin-Layer- Chromatography High accuracy"

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Srivastava, ManMohan, ed. High-Performance Thin-Layer Chromatography (HPTLC). Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-14025-9.

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Srivastava, M. M. High-Performance Thin-Layer Chromatography (HPTLC). Springer-Verlag Berlin Heidelberg, 2011.

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Anne, Schibli, ed. High-performance thin-layer chromatography for the analysis of medicinal plants. Thieme, 2007.

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Kötzing, TCM-Klinik Bad, and University Hospital at Beijing University of Chinese Medicine, eds. Chromatographic fingerprint analysis of herbal medicines: Thin-layer and high performance liquid chromatography of Chinese drugs. 2nd ed. Springer, 2011.

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M, Wieland Donald, Tobes Michael C, Mangner Thomas J, and Society of Nuclear Medicine (1953- ). Radiopharmaceutical Science Council., eds. Analytical and chromatographic techniques in radiopharmaceutical chemistry. Springer-Verlag, 1986.

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Lunn, George. Handbook of derivatization reactions for HPLC. Wiley, 1998.

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I Made Agus Gelgel Wirasuta. Pemanfaatan teknik high performance thin layer chromatography (HPTLC)-spektrofotodensimetri untuk analisis kharakteristik kimia ,,drug profiling" narkoba: Laporan hasil penelitian. Jurusan Farmasi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana, 2008.

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1934-, Cazes Jack, ed. Encyclopedia of chromatography. 3rd ed. Taylor & Francis, 2010.

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1934-, Cazes Jack, ed. Encyclopedia of chromatography. 3rd ed. Taylor & Francis, 2010.

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1934-, Cazes Jack, ed. Encyclopedia of chromatography. 3rd ed. Taylor & Francis, 2010.

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Book chapters on the topic "Thin-Layer- Chromatography High accuracy"

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Milojković-Opsenica, Dušanka, and Filip Andrić. "High Performance Thin-Layer Chromatography." In Green Chromatographic Techniques. Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7735-4_4.

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Ötles, Semih, and Vasfiye Hazal Özyurt. "High-Performance Thin-Layer Chromatography." In Analysis of Naturally Occurring Food Toxins of Plant Origin. CRC Press, 2022. http://dx.doi.org/10.1201/9781003222194-15.

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Charegaonkar, Dilip. "High-Performance Thin-Layer Chromatography: Excellent Automation." In High-Performance Thin-Layer Chromatography (HPTLC). Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14025-9_4.

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Srivastava, MM. "An Overview of HPTLC: A Modern Analytical Technique with Excellent Potential for Automation, Optimization, Hyphenation, and Multidimensional Applications." In High-Performance Thin-Layer Chromatography (HPTLC). Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14025-9_1.

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Mohammad, A., and A. Moheman. "TLC/HPTLC in Biomedical Applications." In High-Performance Thin-Layer Chromatography (HPTLC). Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14025-9_10.

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Indrayanto, Gunawan. "Analytical Aspects of High Performance Thin Layer Chromatography." In High-Performance Thin-Layer Chromatography (HPTLC). Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14025-9_11.

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Dhandhukia, Pinakin C., and Janki N. Thakker. "Quantitative Analysis and Validation of Method Using HPTLC." In High-Performance Thin-Layer Chromatography (HPTLC). Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14025-9_12.

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Zarzycki, Paweł K. "Quantification of Low Molecular Mass Compounds Using Thermostated Planar Chromatography." In High-Performance Thin-Layer Chromatography (HPTLC). Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14025-9_13.

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Tuzimski, Tomasz. "Basic Principles of Planar Chromatography and Its Potential for Hyphenated Techniques." In High-Performance Thin-Layer Chromatography (HPTLC). Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14025-9_14.

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Gupta, Ajai Prakash, and Suphla Gupta. "HPTLC–MS Coupling: New Dimension of HPTLC." In High-Performance Thin-Layer Chromatography (HPTLC). Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14025-9_15.

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Conference papers on the topic "Thin-Layer- Chromatography High accuracy"

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Lytvynenko, Volodymyr, Serge Olszewski, Andrzej Smolarz, et al. "Thin-layer chromatography image segmentation for toxicological studies." In Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2024, edited by Ryszard S. Romaniuk, Andrzej Smolarz, and Waldemar Wójcik. SPIE, 2024. https://doi.org/10.1117/12.3052160.

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Comizzoli, R. B., G. R. Crane, A. J. Muller, R. L. Opila, L. A. Psota-Kelty, and J. D. Sinclair. "Field Failures of Relays with Au10Ag Cc." In CORROSION 1989. NACE International, 1989. https://doi.org/10.5006/c1989-89320.

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Abstract High contact resistance has been observed in relays containing Au10Ag (10 weight percent Ag) contacts after approximately one year in the field. This alloy has been used successfully in a variety of relays for many years. Contact force measurements show that the high contact resistance was not a result of low contact force. Crazing of the polycarbonate relay cover suggested that a Freon TMC rinse of the circuit board leached material from the plastic and recondensed it in the contact region. However, gas chromatography/mass detection of solvent extracts of the metal parts from the rel
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Meadowcroft, D. B., and A. B. Tomkings. "Recent Developments in Methods to Aid Boiler Tube Life Prediction." In CORROSION 1996. NACE International, 1996. https://doi.org/10.5006/c1996-96145.

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Abstract The paper discusses recent advances in methods of measuring tube temperature, corrosion and erosion rates in boiler tubes. A range of techniques in different stages of development are described which allow an "effective" average temperature between outages to be assessed, each dependent on a different diffusion controlled process. Accurate high temperature metrology methods are now available which can give an accuracy of ± 2 μm and thus give significant measurements in a much shorter time than in the past. On-line corrosion monitors are being developed which give a significant respons
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Morávek, Tomáš, Eduardo Serralta, Lukáš Hladík, Narendraraj Chandran, Daniel Němeček, and Robert Stroud. "Advancing Quantitative Failure Analysis and Strain Measurements at the Nanoscale by Using Scanning Electron Diffraction Microscopy Enhanced by Beam Precession." In ISTFA 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.istfa2024p0434.

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Abstract The role of scanning transmission electron microscopy (STEM) in failure analysis has been growing since the introduction of advanced technology nodes (10-nm and beyond), in which transistors (FinFET and nanosheets) have become much smaller and more complex. Four-dimensional scanning transmission electron microscopy (4D-STEM) is a new electron diffraction technique that expands conventional STEM imaging and EDX mapping to enable phase and orientation mapping of crystalline and amorphous phases in deposited thin films at the nanometer resolution. The enhancement of electron diffraction
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Spangenberg, Bernd, Karl-Friedrich Klein, and J. Mannhardt. "High-performance thin layer chromatography using fiber optics and diode-array detection." In International Symposium on Biomedical Optics, edited by Gerald E. Cohn. SPIE, 2002. http://dx.doi.org/10.1117/12.469784.

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Koglin, Eckhardt, Hella Kramer, Juergen Sawatski, Carolin Lehner, and Janice L. Hellman. "In situ identification of high-performance thin-layer chromatography spots by fourier transform surface-enhanced Raman scattering." In Fourier Transform Spectroscopy: Ninth International Conference, edited by John E. Bertie and Hal Wieser. SPIE, 1994. http://dx.doi.org/10.1117/12.166580.

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Jalil, Banaz, JoseM Prieto, Anthony Booker, and Michael Heinrich. "Simultaneous identification of common synthetic adulterants in slimming aids and sexual enhancers herbal supplements by High-performance Thin Layer Chromatography." In GA – 69th Annual Meeting 2021, Virtual conference. Georg Thieme Verlag, 2021. http://dx.doi.org/10.1055/s-0041-1736759.

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Girme, A., A. Mirgal, and L. Hingorani. "Role of high-performance thin-layer chromatography method in separation and analysis of withanosides-withanolides with flavonoid glycoside in Withania somnifera." In GA – 70th Annual Meeting 2022. Georg Thieme Verlag KG, 2022. http://dx.doi.org/10.1055/s-0042-1759030.

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Perner, Lukas W., Gar-Wing Truong, David Follman, et al. "High-Accuracy Measurement of Mid-IR Refractive Indices in GaAs/AlGaAs Thin-Film Heterostructures." In CLEO: Science and Innovations. Optica Publishing Group, 2023. http://dx.doi.org/10.1364/cleo_si.2023.sm4h.4.

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We report a method to simultaneously measure the refractive index of two materials in as-deposited heterostructures by analysis of FTIR spectra and extraction of layer thicknesses via SEM, yielding excellent results for a GaAs/AlGaAs DBR.
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Perner, Lukas W., Georg Winkler, Gar-Wing Truong, et al. "High-Accuracy Measurement of Mid-IR Refractive Indices of GaAs/AlGaAs in Thin-Film Multilayers." In Optical Interference Coatings. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/oic.2022.wa.5.

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We report a method to measure the refractive index of two or more materials in as-deposited thin-film structures by analysis of FTIR transmittance spectra and extraction of layer thicknesses via SEM, yielding excellent results for a GaAs/AlGaAs DBR.
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Reports on the topic "Thin-Layer- Chromatography High accuracy"

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Chutimaworapan, Suchada, Chaiyo Chaichantippayuth, and Areerat Laopaksa. Formulation of pharmaceutical products of Garcinia mangostana Linn. extracts. Chulalongkorn University, 2006. https://doi.org/10.58837/chula.res.2006.32.

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Part I: The purpose of the investigation was to develop the extraction process that was simple, practical and giving high yield. The maceration of dried powder of Garcinia mangostana fruit husk with ethyl acetate gave yellow crystalline powder of mangostin. The yield was calculated as 7.47%. The identification of the Garcinia mangostanahusk extract was carried out by thin-layer chromatography (TLC) and differential scanning calorimetry. The TLC of mangostin was done by using the alumina sheet and ethyl acetate: hexane (3:1) as mobile phase. The Rf value as compared with standard mangostin was
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