Quantitation and Mass Spectrometric Data of Drugs and Isotopically Labeled Analogs PDF Download
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Author: Ray H. Liu
Publisher: CRC Press
ISBN: 142009498X
Category : Law
Languages : en
Pages : 506
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Book Description
The analysis of drugs and their metabolites in biological media are now expected to routinely achieve 20% accuracy in the ng/mL concentration level. Therefore, the availability and the selection of quality ion-pairs designating the analytes and their isotopically labeled analogs (ILAs) are important considerations in achieving the accuracy of qua
Author: Ray H. Liu
Publisher: CRC Press
ISBN: 142009498X
Category : Law
Languages : en
Pages : 506
Get Book Here
Book Description
The analysis of drugs and their metabolites in biological media are now expected to routinely achieve 20% accuracy in the ng/mL concentration level. Therefore, the availability and the selection of quality ion-pairs designating the analytes and their isotopically labeled analogs (ILAs) are important considerations in achieving the accuracy of qua
Author: Uttam Garg
Publisher: Springer Nature
ISBN: 1071635417
Category : Science
Languages : en
Pages : 469
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Book Description
This fully updated volume describes methods and protocols for a number of drugs and toxins in a stepwise manner. Exploring the versatility and flexibility of mass spectrometry, the book covers the advantages of this technology, which typically include elimination of the need for special reagents such as antibodies, increased sensitivity and specificity, and multi-component analysis enabling the screening of tens to hundreds of compounds in a single assay run. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step and readily reproducible laboratory protocols, as well as tips on troubleshooting and avoiding known pitfalls. Authoritative and up-to-date, Clinical Applications of Mass Spectrometry in Drug Analysis: Methods and Protocols, Second Edition serves as a valuable resource for laboratory professionals who are already utilizing mass spectrometry or considering bringing this technology to their labs.
Author: Wilfried M. A. Niessen
Publisher: John Wiley & Sons
ISBN: 111929424X
Category : Science
Languages : en
Pages : 413
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Book Description
Provides comprehensive coverage of the interpretation of LC–MS–MS mass spectra of 1300 drugs and pesticides Provides a general discussion on the fragmentation of even-electron ions (protonated and deprotonated molecules) in both positive-ion and negative-ion modes This is the reference book for the interpretation of MS–MS mass spectra of small organic molecules Covers related therapeutic classes of compounds such as drugs for cardiovascular diseases, psychotropic compounds, drugs of abuse and designer drugs, antimicrobials, among many others Covers general fragmentation rule as well as specific fragmentation pathways for many chemical functional groups Gives an introduction to MS technology, mass spectral terminology, information contained in mass spectra, and to the identification strategies used for different types of unknowns
Author: RH. Liu
Publisher:
ISBN:
Category : Barbiturates
Languages : en
Pages : 7
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Book Description
Internal standards are commonly used for the quantitative determination of drugs of abuse and their metabolites (drug/metabolite) in biological fluids and tissues by the selective ion monitoring (SIM) gas chromatography/mass spectrometry (GC/MS) procedure. Analogs of drugs/metabolites that are labeled with three or more deuterium atoms (Isotopic analog) at appropriate positions are considered to be the most effective internal standards for these applications. Before a specific deuterated analog can be adopted as an internal standard in a GC/MS assay, the mass spectrum of the compound or its derivative must be evaluated along with the corresponding spectrum from the parent drug/metabolite. There should be an adequate number of sufficiently high-mass ions (typically three for the drug/metabolite and two for the isotopic analog) that can be attributed to each analyte, and these ions should be sufficiently free of interference from the other analyte of the pair (cross-contribution) Interferences may be caused by the presence of an isotopic impurity in the deuterated analog (extrinsic factor) or may be due to the ion fragmentation characteristics of the compound (intrinsic factor) The extrinsic factor may be corrected by the manufacturer with different synthetic methods and purification procedures, while the intrinsic factor may be partially or wholly corrected through the use of different chemical derivatives (sample preparation stage) or different ionization (GC/MS assay stage) procedures.
Author: Swapan Chowdhury
Publisher: Elsevier
ISBN: 0080456065
Category : Science
Languages : en
Pages : 355
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Book Description
As new techniques of transferring from liquid to gas phase and measuring masses of drug molecules and metabolites become more prevalent, so do the technical challenges of putting these techniques into proper use, as well as the task of consolidating emerging applications. Identification and Quantification of Drugs, Metabolites and Metabolizing Enzymes by LC-MS, Volume 6 fills the gap in the lack of presently available literature by providing a critical review in the current use of liquid chromatography-mass spectrometry (LC-MS) in drug discovery and development. With chapters written by experts with a wide range of practical experience from the pharmaceutical industry, emphasis is placed on techniques and applications. The book also includes chapters on how to utilize LC-MS instrumentation for current drug metabolism problems. This book is intended for those beginning to use LC-MS for drug metabolism studies as well as for those considered advanced practitioners.* Introduces readers to the practical applications of modern liquid chromatography-mass spectrometry (LC-MS) in a wide range of drug metabolism studies·* Provides a comprehensive description of different forms of metabolites, with detailed discussion on the wide range of methodologies used to identify them* Highlights problems associated with drug quantification and offers practical solutions
Author: David T. Rossi
Publisher: CRC Press
ISBN: 9781420002478
Category : Medical
Languages : en
Pages : 436
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Book Description
Mass Spectrometry in Drug Discovery summarizes the theory, instrumentation, techniques, and application of mass spectrometry and atmospheric pressure ionization to screening, evaluating, and improving the performance and quality of drug candidates. It provides time- and cost-efficient approaches for the generation and analysis of effective pharmaceuticals, covers advances in combinatorial chemistry, molecular biology, bioanalysis automation, and computing, and demonstrates the use of mass spectrometry in the assessment of disease states, drug targets, and potential drug agents.
Author: Igor A. Kaltashov
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110546183
Category : Science
Languages : en
Pages : 280
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Book Description
Biopharmaceuticals are a unique class of compounds due to their extreme structural complexity. The current text puts together a variety of the state‐of‐the art approaches that use mass spectrometry to evaluate various aspects of biopharmaceutical products ranging from monitoring stress‐related structural changes to their quantitation in pharmacokinetic studies.
Author: Chang Liu
Publisher: John Wiley & Sons
ISBN: 1119678439
Category : Science
Languages : en
Pages : 516
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Book Description
Apply mass spectrometry to every phase of new drug discovery with this cutting-edge guide Mass spectrometry is a technique that identifies and characterizes compounds based on their mass – the fundamental molecular characteristic. It has become an invaluable analytical tool in various disciplines, industries, and research fields. It has become particularly central to new drug discovery and development, which broadly deploys mass spectrometry at every phase. The pharmaceutical industry has become one of the main drivers of technological development in mass spectrometry. High Throughput Mass Spectrometry in Drug Discovery offers a comprehensive introduction to mass spectrometry and its applications in pharmaceutical development. It covers the foundational principles and science of mass spectrometry before moving to specific experimental methods and their applications at various stages of drug discovery. Its thorough treatment and detailed guidance make it an invaluable tool for pharmaceutical research and development. High Throughput Mass Spectrometry in Drug Discovery readers will also find: Detailed analysis of techniques, including label-free screening, synthetic reaction optimization, and more An authorial team with extensive combined experience in research and industrial applications Technical strategies with the potential to accelerate quantitative bioanalysis in drug discovery High Throughput Mass Spectrometry in Drug Discovery is essential for analytical, bioanalytical, and medicinal chemists working in the pharmaceutical industry and for any researchers and graduate students interested in drug discovery and development.
Author: Noureddine Boudriga
Publisher: CRC Press
ISBN: 0849379423
Category : Computers
Languages : en
Pages : 648
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Book Description
This innovative resource provides comprehensive coverage of the policies, practices, and guidelines needed to address the security issues related to today's wireless sensor networks, satellite services, mobile e-services, and inter-system roaming and interconnecting systems. It details the major mobile standards for securing mobile communications and examines architectures that can provide data confidentiality, authentication, integrity, and privacy in various wireless environments. The book defines the roles and responsibilities that network operators, service providers, and even customers need to fulfill to assure mobile communications are as secure as they are prolific.
Author: Frigerio
Publisher: Springer Science & Business Media
ISBN: 1461341515
Category : Science
Languages : en
Pages : 527
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Book Description
When a dose of drug is administered, three main phases of drug action may be distingushed. In the "pharmaceutical" phase the dosage form disintegrates, the active substance dissolves and becomes available for absorption. The second phase ("pharmaco kinetic" phase) includes absorption, distribution, metabolism, and excretion. That fraction of the dose which finally reaches the circulation after absorption will be available for biological action in the third, or "pharmacodynamic" phase when the drug reaches the target tissues and a drug-receptor interaction takes place. The objectives in studies of drug metabolism are: (a) to identify the pathways by which drugs are transformed in the body; (b) to ascertain quantitatively the importance of each pathway and intermediate; (c) to identify and quantify endogenous constituents influenced by the drug or its metabolites which may interfere with common metabolic processes. Since metabolites usually differ from their precursors by only a single chemical group, the resulting metabolic pathways generally consist of a series of closely related compounds. Mass spectrometry is uniquely suited for the analysis of drugs and metabolites for several reasons: only a minimal amount of sample preparation is needed, closely related compounds can be analyzed in a single step, structures can often be deduced directly from the mass spectra without the need for pure reference spectra, and constituents can be quantified with relative ease even when present in fractional nanogram quantity.
