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Relevant bibliographies by topics / Impurities identification

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Academic literature on the topic 'Impurities identification'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 May 2024

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Journal articles on the topic "Impurities identification"

1

Qiu, Fenghe, and Daniel L. Norwood. "Identification of Pharmaceutical Impurities." Journal of Liquid Chromatography & Related Technologies 30, no. 5-7 (2007): 877–935. http://dx.doi.org/10.1080/10826070701191151.

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Reddy Gopa, Sudheer Kumar, Pradeep Kumar Brahman, and Mallu Usenireddy. "Synthesis, Identification and Charcaterization of Potential impurities of Pomalidomide." Research Journal of Chemistry and Environment 27, no. 3 (2023): 86–92. http://dx.doi.org/10.25303/2703rjce086092.

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Pomalidomide is used for treating multiple myeloma and was synthesized for commercial use as a drug substance in highly pure form. In the process of synthesis of pure drug of pomalidomide, there is a possibility of formation of process related impurities. These impurities must be identified and controlled for producing safe medicine. In view of this, present study aimed at synthesizing four potential impurities of pomalidomide such as benzyldione, 5 – amino, desamino and nitrodion impurities. All these impurities were effectively synthesized and subsequently characterized using FT-IR, NMR and

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Sunil Kumar, I. V., G. S. R. Anjaneyulu, and V. Hima Bindu. "Identification and synthesis of impurities formed during sertindole preparation." Beilstein Journal of Organic Chemistry 7 (January 7, 2011): 29–33. http://dx.doi.org/10.3762/bjoc.7.5.

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Sertindole (1), an atypical anti-psychotic drug is used for the treatment of schizophrenia. During the laboratory optimization and later during its bulk synthesis the formation of various impurities was observed. The impurities formed were monitored and their structures were tentatively assigned on the basis of their fragmentation patterns in LC-MS. Most of the impurities were synthesized and their assigned constitutions confirmed by co-injection in HPLC. We describe herein the formation, synthesis and characterization of these impurities. Our study will be of immense help to others to obtain

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Westwood, Glenn. "Nuclear Magnetic Resonance Spectroscopy of Trace Organic Impurities Extracted from a Corrosion Inhibitor and a Semiaqueous Residue Remover." Solid State Phenomena 219 (September 2014): 284–87. http://dx.doi.org/10.4028/www.scientific.net/ssp.219.284.

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Within the next ten years, advanced semiconductor manufacturing will move into the sub-10 nm regime [1]. At these dimensions, there is concern that molecular scale impurities (≤ 1 nm diameter) within cleaning chemistries will have an increasing impact on wafer cleanliness, device yield, and performance. Considering that these impurities may be on the same size scale as some of the active ingredients, this will raise significant challenges for solution developers in terms of impurity identification and prevention. Herein, we will describe our efforts to better understand the impurities within a

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5

Dureja, P., R. S. Tanwar, and S. S. Tomar. "Identification of impurities in technical monocrotophos." Toxicological & Environmental Chemistry 18, no. 2-3 (1988): 205–10. http://dx.doi.org/10.1080/02772248809357312.

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Dureja, P., R. S. Tanwar, and Partha P. Choudhary. "Identification of impurities in technical metalaxyl." Chemosphere 41, no. 9 (2000): 1407–10. http://dx.doi.org/10.1016/s0045-6535(99)00543-3.

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Arzamastsev, A. P., T. Yu Luttseva, N. A. Klyuev, and N. P. Sadchikova. "Mass-spectrometric identification of impurities in Ditilin." Pharmaceutical Chemistry Journal 33, no. 12 (1999): 665–70. http://dx.doi.org/10.1007/bf02974945.

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Hong, Jongbae, and Aiguo Xu. "Nondestructive identification of impurities in granular medium." Applied Physics Letters 81, no. 25 (2002): 4868–70. http://dx.doi.org/10.1063/1.1522829.

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Xiong, Kaihe, Xingling Ma, Na Cao, et al. "Identification, characterization and HPLC quantification of impurities in apremilast." Analytical Methods 8, no. 8 (2016): 1889–97. http://dx.doi.org/10.1039/c5ay01759a.

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A new compound Imp-F was obtained and the structures were elucidated by using spectral data (NMR, MS, and IR); the potential process-related impurities were speculated in the apremilast drug; LC conditions were optimized and an effective HPLC method for the quantitative determination of the potential process-related impurities in apremilast was developed.

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Li, Xianjiang, Wen Ma, Bingxin Yang, Mengling Tu, Qinghe Zhang, and Hongmei Li. "Impurity Profiling of Dinotefuran by High Resolution Mass Spectrometry and SIRIUS Tool." Molecules 27, no. 16 (2022): 5251. http://dx.doi.org/10.3390/molecules27165251.

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Dinotefuran (DNT) is a neonicotinoid insecticide widely used in pest control. Identification of structurally related impurities is indispensable during material purification and pesticide registration and certified reference material development, and therefore needs to be carefully characterized. In this study, a combined strategy with liquid chromatography high-resolution mass spectrometry and SIRIUS has been developed to elucidate impurities from DNT material. MS and MS/MS spectra were used to score the impurity candidates by isotope score and fragment tree in the computer assisted tool, SIR

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Dissertations / Theses on the topic "Impurities identification"

1

McCarthy, Patrick Kieran. "HPLC and immunochemical detection of gliadin impurities in wheat and wheat products." Thesis, Nottingham Trent University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253810.

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Marchal, Cathie. "Développement de méthodes analytiques pour la caractérisaton de lots industriels du nitroxyde SG1." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4767.

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Ce travail de thèse s’inscrit dans un contexte industriel. Il consiste en la caractérisation de lots bruts de SG1 : le N-tert-butyl-N- (1-diethylphosphono-2,2-dimethylpropyl)-N-oxyle. La spécificité de cette espèce est son caractère radicalaire stable. La première partie de ce travail consistait à développer une méthode d’analyse, facilement applicable en laboratoire d’analyse de contrôle sur site industriel pour la caractérisation de la pureté en SG1 dans des lots synthétisés. La méthode choisie a été développée par chromatographie liquide haute performance (HPLC). Pour ce faire, un étalon de

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Marchal, Cathie. "Développement de méthodes analytiques pour la caractérisaton de lots industriels du nitroxyde SG1." Electronic Thesis or Diss., Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4767.

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Ce travail de thèse s’inscrit dans un contexte industriel. Il consiste en la caractérisation de lots bruts de SG1 : le N-tert-butyl-N- (1-diethylphosphono-2,2-dimethylpropyl)-N-oxyle. La spécificité de cette espèce est son caractère radicalaire stable. La première partie de ce travail consistait à développer une méthode d’analyse, facilement applicable en laboratoire d’analyse de contrôle sur site industriel pour la caractérisation de la pureté en SG1 dans des lots synthétisés. La méthode choisie a été développée par chromatographie liquide haute performance (HPLC). Pour ce faire, un étalon de

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4

Su, Hao-yuan, and 蘇澔元. "Identification of Major Impurities of Alachlor." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/pmjch6.

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碩士<br>朝陽科技大學<br>應用化學系碩士班<br>92<br>Beside of the active ingredient, there are six impurities which exceed the amount of 0.1% and have been found when the analytical technique of gas chromatography with flame ionization detector was used to analyze Alachlor herbicide. These impurities were named with impurity A to Impurity F for convenient identification. Gas chromatography combined with mass spectrometer was also used to identify these impurities in this study. The mass spectra of these impurities were compared with the NIST mass library to find out the possible matching chemicals for these imp

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Lee, Jun-sheng, and 李俊昇. "Identification of Major Impurities of Butachlor." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/gag6p7.

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碩士<br>朝陽科技大學<br>應用化學系碩士班<br>92<br>Beside of the active ingredient, there are six major impurities which exceed the amount of 0.1% and have been found when the analytical technique of gas chromatography with flame ionization detector was used to analyze Butachlor herbicide. These impurities were named with impurity I to impurity VI for easy identification. Gas chromatography with mass detector was used to identify these impurities in this study. The mass spectra of these impurities were compared with the NIST mass library to find out possible matching chemicals for these impurities. The exact m

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Books on the topic "Impurities identification"

1

Teasdale, Andrew. Genotoxic impurities: Strategies for identification and control. Wiley, 2011.

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Teasdale, Andrew. Mutagenic Impurities: Strategies for Identification and Control. Wiley & Sons, Incorporated, John, 2022.

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Teasdale, Andrew. Genotoxic Impurities: Strategies for Identification and Control. Wiley & Sons, Incorporated, John, 2011.

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Identification and Determination of Impurities in Drugs. Elsevier, 2000. http://dx.doi.org/10.1016/s1464-3456(00)x8001-5.

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Teasdale, Andrew. Mutagenic Impurities: Strategies for Identification and Control. Wiley & Sons, Incorporated, John, 2021.

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6

Görög, S. Identification and Determination of Impurities in Drugs. Elsevier Science & Technology Books, 2000.

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Teasdale, Andrew. Mutagenic Impurities: Strategies for Identification and Control. Wiley & Sons, Incorporated, John, 2021.

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Teasdale, Andrew. Genotoxic Impurities: Strategies for Identification and Control. Wiley & Sons, Incorporated, John, 2011.

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Teasdale, Andrew. Genotoxic Impurities: Strategies for Identification and Control. Wiley & Sons, Incorporated, John, 2010.

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Teasdale, Andrew. Mutagenic Impurities: Strategies for Identification and Control. Wiley & Sons, Limited, John, 2021.

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Book chapters on the topic "Impurities identification"

1

Dobo, Krista, Don Walker, and Andrew Teasdale. "Human Genotoxic Metabolites: Identification and Risk Management." In Genotoxic Impurities. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470929377.ch6.

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2

Berberich, David W., Tao Jiang, Joseph McClurg, Frank Moser, and R. Randy Wilhelm. "Impurity Identification for Drug Substances." In Characterization of Impurities and Degradants Using Mass Spectrometry. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470921371.ch8.

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Liu, David Q., Mingjiang Sun, and Lianming Wu. "Impurity Identification in Process Chemistry by Mass Spectrometry." In Characterization of Impurities and Degradants Using Mass Spectrometry. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470921371.ch9.

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4

Hambly, David M., and Himanshu S. Gadgil. "Identification and Quantification of Degradants and Impurities in Antibodies." In Characterization of Impurities and Degradants Using Mass Spectrometry. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470921371.ch13.

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5

Meyer, B. K., D. M. Hofmann, J. Stehr, and A. Hoffmann. "Spectral Identification of Impurities and Native Defects in ZnO." In Zinc Oxide Materials for Electronic and Optoelectronic Device Applications. John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781119991038.ch6.

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6

Gu, Ming. "Isotope Patten Recognition on Molecular Formula Determination for Structural Identification of Impurities." In Characterization of Impurities and Degradants Using Mass Spectrometry. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9780470921371.ch6.

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7

Mohan, Ganapathy. "Low Level Impurities in Drug Substances and Drug Products and the Analytical Challenges in Identification and Quantitation." In Pharmaceutical Stability Testing to Support Global Markets. Springer New York, 2009. http://dx.doi.org/10.1007/978-1-4419-0889-6_16.

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8

"Identification and Control of Genotoxic Degradation Products." In Pharmaceutical Industry Practices on Genotoxic Impurities. CRC Press, 2014. http://dx.doi.org/10.1201/b17350-19.

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9

Görög, Sándor. "Preface." In Identification and Determination of Impurities in Drugs. Elsevier, 2000. http://dx.doi.org/10.1016/s1464-3456(00)80001-0.

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"List of contributors." In Identification and Determination of Impurities in Drugs. Elsevier, 2000. http://dx.doi.org/10.1016/s1464-3456(00)80002-2.

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Conference papers on the topic "Impurities identification"

1

Paudyal, Bijaya, Yo Han Yoon, David Cornwell, Phil Shaw, and Francisco Machuca. "Identification of metal impurities in crystalline silicon wafers." In 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC). IEEE, 2012. http://dx.doi.org/10.1109/pvsc.2012.6317652.

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Harris, T. D. "Quantitative and Qualitative Determination of Impurities in III - V Semiconductors." In Laser Applications to Chemical Analysis. Optica Publishing Group, 1987. http://dx.doi.org/10.1364/laca.1987.tha6.

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Identification and determination of impurities in modern semiconductors is one of the most challenging analytical problems in materials characterization. Total impurity concentrations rarely exceed 100 parts per billion and the chemical state of the impurity is central to it's effect on semiconductor performance. The detection of these impurities is beyond almost all available analytical methods. Quantitative determination of these impurities is nearly impossible.

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3

Harris, T. D., and J. I. Colonell. "Quantitative Fluorescence Determination of Impurities in Compound Semiconductors." In Laser Applications to Chemical Analysis. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/laca.1990.tub1.

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The electrical behavior of compound semiconductors is governed by the combined effects of the stoichiometry and impurities. The determination of impurity concentration in undoped samples is a largely unsolved problem. This deficiency results from the high purity routinely achieved in these materials, typically 1-20 ppb total impurity concentration, less than the detection limit of the applicable methods, such as SIMS. Progress toward quantitative impurity determination has been achieved by employing electronic Raman scattering, but this method is applicable only to acceptor concentration deter

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4

Moghaddam, Hossein Azizi, Farshid Mahmouditabar, and Ali Haghi. "Identification of Iron Powder B-H Characteristics Considering Impurities in the magnetic material." In 2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC). IEEE, 2019. http://dx.doi.org/10.1109/pedstc.2019.8697726.

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5

Leandro S. Oliveira, Adriana S. Franca, and Vany P. Ferraz. "An analytical methodology for identification and quantification of common impurities in commercial roasted coffee." In 2001 Sacramento, CA July 29-August 1,2001. American Society of Agricultural and Biological Engineers, 2001. http://dx.doi.org/10.13031/2013.4054.

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Zamri, W. Wan Mohd, M. Muhammad Yasin, W. Wan Hashim, and A. Md Sani. "Breaking Barriers: Forging a Strategic Path for CCS Through Innovative Management of Other Contaminants Beyond CO2." In SPE Conference at Oman Petroleum & Energy Show. SPE, 2024. http://dx.doi.org/10.2118/218503-ms.

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Abstract Planning for CCS (Carbon Capture and Storage) development involves end-to-end evaluation from source to storage. When CCS is brought up as a topic, the conversation tends to center on managing CO2 (Carbon Dioxide). However, emission sources consist not only CO2, but also other contaminants and impurities such as H2S (Hydrogen Sulfide), SOx (Sulphur Oxide) and NOx (Nitrogen Oxide) and H2O (water). The origin of the emission determines the type of impurities present. For example. SOx and NOx only appears from post combustion sources but not from Acid Gas sources (recovered from the AGRU

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Dutta, Debarati, Ravi Anand, and Anirban Sarkar. "Independently Operational Dual-Frequency Band Metamaterial Based EM Biosensor for Identification and Quantification of Impurities in Vegetable Oils." In 2023 IEEE SENSORS. IEEE, 2023. http://dx.doi.org/10.1109/sensors56945.2023.10325059.

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Radzig, Victor A. "The Point Defects with Low-Coordinated Si or Ge Atoms on Vitreous Silica Surface. Surface and Bulk Centers Comparison." In Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/bgppf.1997.jmd.3.

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Until recently, investigations of the surface and bulk defects in silica glass have developed virtually independent. Only in [1,2] some properties of the surface and bulk defects in vitreous silica were compared. Identification of the structure of defects in the bulk of silica glass is a considerably more complicated problem. This is explained by a wide variety of methods, which can be used to identify the structure of surface defects and reveal the mechanisms of their transformations under the action of different external factors (temperature, UV and γ-irradiation, reactions with different im

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de Villiers, Johan P. R., Noko Ngoepe, James Roberts, and Alison S. Tuling. "Evaluation of the Phase Composition, Crystallinity and Trace Isotope Variation of SiC in Experimental TRISO Coated Particles." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58208.

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The silicon carbide layers in experimental TRISO coated particles with zirconia kernels were evaluated for their phase composition, their impurity levels and the crystal perfection and twinning of the crystallites in the layers. This evaluation was necessary to compare the different SiC layers and to relate these properties to various quality tests and ultimately to manufacturing parameters in the CVD coater. Identification of the various polytypes was done using electron diffraction methods. This is the only method for the unequivocal identification of the different polytypes. The 3C, and 6H

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Duensing, Yannick, Oliver Richert, and Katharina Schmitz. "Investigating the Condition Monitoring Potential of Oil Conductivity for Wear Identification in Electro Hydrostatic Actuators." In ASME/BATH 2021 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/fpmc2021-68818.

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Abstract To meet future goals of more electric airplanes conventional hydraulic airplane control systems, consisting of redundant centralized pumps within the airplane’s fuselage, need to be substituted for compact electro-hydraulic actuators (EHA). The capsulated architecture of EHAs results in higher safety due to separate hydraulic circuits, simple practicability of redundancy, decreased maintenance because of simplified error location detection as well as an overall reduction in weight and complexity of the airplane control system. Currently, EHAs are only used as backup devices as the rel

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