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Stueber D, Dance ZEX. Component Quantification in Solids with the Mixture Analysis Using References Method. Anal Chem 2020; 92:11095-11102. [PMID: 32628013 DOI: 10.1021/acs.analchem.0c01045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Quantifying components in solid mixtures composed of the same chemical species exhibiting different physical forms represents a difficult challenge in many areas of chemistry. The development of small-molecule active pharmaceutical ingredients (APIs) is a classic example. APIs predominantly exhibit polymorphism and the propensity to form solvates and hydrates. The various API phases typically display different physical properties affecting chemical stability, processability, and bioperformance. Accordingly, API development critically relies on characterizing and quantifying the relevant API forms in complex mixtures in the presence of each other and in the presence of excipients. Presented here is a new solid-state-NMR-based quantification method for components in solid mixtures: mixture analysis using references (MAR). The method utilizes weighted pure component reference spectra in a linear combination fitting procedure to reproduce the corresponding mixture spectrum. The results yield the respective component contributions to the mixture composition. Using several model systems of varying complexity, the applicability and performance of the MAR analysis utilizing 13C and 19F cross-polarization magic-angle-spinning data are evaluated. Finally, the MAR method is compared to one of the most commonly applied traditional quantification methods. The results demonstrate that MAR performs with the same high accuracy as conventional methods. However, MAR exhibits clear efficiency advantages over conventional methods by requiring significantly less overall time (experimental and computational) and displaying remarkable robustness and general applicability. The MAR quantification protocol as presented here can easily be applied to nonpharmaceutical molecular systems in other branches of chemistry.
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Affiliation(s)
- Dirk Stueber
- Department of Analytical Research and Development, Merck Research Laboratories, Merck & Company, Inc., Rahway, New Jersey 07065, United States
| | - Zachary E X Dance
- Department of Analytical Research and Development, Merck Research Laboratories, Merck & Company, Inc., Rahway, New Jersey 07065, United States
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Tian Y, Wang WD, Zou WB, Qian JQ, Hu CQ. Application of Solid-State NMR to Reveal Structural Differences in Cefazolin Sodium Pentahydrate From Different Manufacturing Processes. Front Chem 2018; 6:113. [PMID: 29692988 PMCID: PMC5902681 DOI: 10.3389/fchem.2018.00113] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 03/26/2018] [Indexed: 11/17/2022] Open
Abstract
Solid-state Nuclear magnetic resonance, thermogravimetric analysis, X-ray diffraction, and Fourier-transform infrared spectroscopy were combined with theoretical calculation to investigate different crystal packings of α-cefazolin sodium obtained from three different vendors and conformational polymorphism was identified to exist in α-cefazolin sodium. Marginal differences observed among cefazolin sodium pentahydrate 1, 2, and 3 were speculated as being caused by the proportion of conformation 2.
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Affiliation(s)
- Ye Tian
- National Institutes for Food and Drug Control, Beijing, China
| | - Wei D Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China
| | - Wen-Bo Zou
- National Institutes for Food and Drug Control, Beijing, China
| | - Jian-Qin Qian
- Zhejiang Institute for Food and Drug Control, Hangzhou, China
| | - Chang-Qin Hu
- National Institutes for Food and Drug Control, Beijing, China
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Smith AN, Long JR. Dynamic Nuclear Polarization as an Enabling Technology for Solid State Nuclear Magnetic Resonance Spectroscopy. Anal Chem 2016; 88:122-32. [PMID: 26594903 PMCID: PMC5704910 DOI: 10.1021/acs.analchem.5b04376] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Adam N Smith
- Department of Chemistry, University of Florida , 214 Leigh Hall, Gainesville, Florida 32611-7200, United States
| | - Joanna R Long
- Department of Biochemistry and Molecular Biology, University of Florida , P. O. Box 100245, Gainesville, Florida 32610-0245, United States
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Šuštar V, Kolar J, Lusa L, Learner T, Schilling M, Rivenc R, Khanjian H, Koleša D. Identification of historical polymers using Near-Infrared Spectroscopy. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2013.12.035] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Srebro M, Autschbach J. Computational Analysis of47/49Ti NMR Shifts and Electric Field Gradient Tensors of Half-Titanocene Complexes: Structure-Bonding-Property Relationships. Chemistry 2013; 19:12018-33. [DOI: 10.1002/chem.201301301] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Indexed: 11/08/2022]
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Abstract
Nuclear Magnetic Resonance (NMR) spectroscopy is a well-established method for the investigation of various types of porous materials. During the past decade, metal–organic frameworks have attracted increasing research interest. Solid-state NMR spectroscopy has rapidly evolved into an important tool for the study of the structure, dynamics and flexibility of these materials, as well as for the characterization of host–guest interactions with adsorbed species such as xenon, carbon dioxide, water, and many others. The present review introduces and highlights recent developments in this rapidly growing field.
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Mollica G, Ziarelli F, Tintaru A, Thureau P, Viel S. Suppressing background signals in solid state NMR via the Electronic Mixing-Mediated Annihilation (EMMA) method. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2012; 218:1-4. [PMID: 22578547 DOI: 10.1016/j.jmr.2012.03.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 03/02/2012] [Accepted: 03/17/2012] [Indexed: 05/31/2023]
Abstract
A simple procedure to effectively suppress background signals arising from various probe head components (e.g. stator, rotors, inserts) in solid state NMR is presented. Similarly to the ERETIC™ method, which uses an electronic signal as an internal standard for quantification, the proposed scheme is based on an electronically generated time-dependent signal that is injected into the receiver coil of the NMR probe head during signal acquisition. More specifically, the line shape, width and frequency of this electronic signal are determined by deconvoluting the background signal in the frequency domain. This deconvoluted signal is then converted into a time-dependent function through inverse Fourier Transform, which is used to generate the shaped pulse that is fed into the receiver coil during the acquisition of the Free Induction Decay. The power of the shaped pulse is adjusted to match the intensity of the background signal, and its phase is shifted by 180° with respect to the receiver reference phase. This so-called Electronic Mixing-Mediated Annihilation (EMMA) methodology is demonstrated here with a (13)C Single Pulse Magic Angle Spinning spectrum of an isotopically enriched (13)C histidine solid sample recorded under quantitative conditions.
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Affiliation(s)
- Giulia Mollica
- Aix-Marseille Univ. & CNRS, Institut de Chimie Radicalaire UMR 7273, Equipe Spectrométries Appliquées à la Chimie Structurale, av. Escadrille Normandie Niémen, case 512, F-13013 Marseille, France
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Liu W, Wang WD, Wang W, Bai S, Dybowski C. Influence of Structure on the Spectroscopic Properties of the Polymorphs of Piroxicam. J Phys Chem B 2010; 114:16641-9. [DOI: 10.1021/jp1084444] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Wei Liu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, China, and Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Wei David Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, China, and Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Wei Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, China, and Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Shi Bai
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, China, and Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Cecil Dybowski
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu, 730000, China, and Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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