Download or read book Evaluating Nitrogen Direct Analysis in Real Time Mass Spectrometry for Forensic Analysis of Seized Drugs written by Jeffrey Daniel Quick and published by . This book was released on 2018 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct Analysis in Real Time Ionization for High resolution Mass Spectrometry written by Julia Diane Laney Rummel and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Direct Analysis in Real Time (DART) is an ionization method for mass spectrometry (MS) that was introduced by Cody and coworkers in 2005.1 This source operates by passing helium or nitrogen between a high voltage needle and a counter electrode to produce an electrical discharge. Additional electrodes are present to remove all but the excited-state gas atoms/molecules. The excited species produced by the DART source may either ionize analytes directly or may interact with ambient components to create reagent ions that may ionize analyte molecules. Analytes are inserted directly into the stream of excited gas atoms or molecules that exit the DART source for desorption and ionization. Because little or no sample preparation is required and analyses are performed in ambient conditions, DART-MS offers rapid analyses of a variety of compound classes with minimal effort. For the current work, a DART source was fabricated and interfaced to several different mass spectrometers. The source was optimized and its analytical figures of merit were determined with analytes representative of illicit drugs, explosives, pesticides, and chemical warfare agents.
Download or read book Direct Analysis in Real Time Mass Spectrometry written by Yiyang Dong and published by John Wiley & Sons. This book was released on 2018-04-09 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clear, comprehensive, and state of the art, the groundbreaking book on the emerging technology of direct analysis in real time mass spectrometry Written by a noted expert in the field, Direct Analysis in Real Time Mass Spectrometry offers a review of the background and the most recent developments in DART-MS. Invented in 2005, DART-MS offers a wide range of applications for solving numerous analytical problems in various environments, including food science, forensics, and clinical analysis. The text presents an introduction to the history of the technology and includes information on the theoretical background, for exampleon the ionization mechanism. Chapters on sampling and coupling to different types of mass spectrometers are followed by a comprehensive discussion of a broad range of applications. Unlike most other ionization methods, DART does not require laborious sample preparation, as ionization takes place directly on the sample surface. This makes the technique especially attractive for applications in forensics and food science. Comprehensive in scope, this vital text: -Sets the standard on an important and emerging ionization technique -Thoroughly discusses all the relevant aspects from instrumentation to applications -Helps in solving numerous analytical problems in various applications, for example food science, forensics, environmental and clinical analysis -Covers mechanisms, coupling to mass spectrometers, and includes information on challenges and disadvantages of the technique Academics, analytical chemists, pharmaceutical chemists, clinical chemists, forensic scientists, and others will find this illuminating text a must-have resource for understanding the most recent developments in the field.
Download or read book Direct Analysis in Real Time Mass Spectrometry written by Yiyang Dong and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparative Study of Nitrogen Versus Helium Direct Analysis in Real Time Mass Spectrometry for the Analysis of Polar Compounds written by Wei Chean Chuah and published by . This book was released on 2018 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ambient Ionization Mass Spectrometry for the Forensic Screening of Pharmaceuticals and the Determination of Potential Drug Candidates written by Leonard Nyadong and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ambient mass spectrometry (MS) is a new and growing sub-field in MS which has opened new research avenues, particularly for applications relating to the analysis of solid samples. Results on the implementation and application of ambient MS techniques including: desorption electrospray ionization (DESI) and direct analysis in real time (DART) indicated that these techniques could serve as complementary tools for the rapid qualitative screening of pharmaceuticals, allowing up to two orders of magnitude improvement in throughput compared to traditional methods such as liquid chromatography MS. The selectivity of DESI could be enhanced by performing the experiment in the reactive mode. In this mode, complexation reactions between reagents added to the spray solvent and analytes on the sample surface resulted in analyte stabilization, inhibiting fragmentation. They also resulted in a concomitant enhancement in the analyte surface activity, facilitating their evaporation from secondary droplets culminating in an improvement in sensitivity. Also for drug tablets analysis, the analyte signal dependency on DESI geometrical set-up variables could be mitigated following the careful and controlled addition of an isotopically labeled internal standard (IS) to the sample or by spraying samples with a pair of reagents with different affinities for the analyte. Either of these approaches resulted in an analyte-to-IS signal ratio (in the former) or an analyte complex ratio (in the later), which was largely independent of DESI experimental variables allowing quantitative analysis using this technique. DESI MS was also observed to be a very powerful tool for determining the 2-D distribution of various pharmaceutically important compounds on tablet and tissue surfaces. The ability to map the distribution of molecules of interest by DESI MS has very great implications in drug tablet quality control and in determining the role of chemical signals presented on tissue surfaces. DESI was observed to be limited to ionizing molecules of medium to high polarities without much limitation in terms of mass range, whereas DART was better suited for the analysis of molecules within a broader range of polarities, but within a more limited mass range (up to 800 Da approximately). These limitations were circumvented by implementing a novel multimode ambient ion source, desorption electrospray/metastable-induced ionization (DEMI), which combines various aspects of DESI and DART. Initial experiments with the DEMI ion source demonstrated its ability to enable the simultaneous analysis of molecules within a broader range of polarities and masses than DESI and DART alone.
Download or read book Development of Direct Analysis in Real Time high Resolution Mass Spectrometry DART HRMS and Statistical Analysis Tools for the Identification and Classification of Psychoactive Plant Drugs written by Ashton D. Lesiak and published by . This book was released on 2016 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Development Evaluation of Hot stage Microscopy Direct Analysis in Real time Mass Spectrometry written by Gage P. Ashton and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Countering the Problem of Falsified and Substandard Drugs written by Institute of Medicine and published by National Academies Press. This book was released on 2013-06-20 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: The adulteration and fraudulent manufacture of medicines is an old problem, vastly aggravated by modern manufacturing and trade. In the last decade, impotent antimicrobial drugs have compromised the treatment of many deadly diseases in poor countries. More recently, negligent production at a Massachusetts compounding pharmacy sickened hundreds of Americans. While the national drugs regulatory authority (hereafter, the regulatory authority) is responsible for the safety of a country's drug supply, no single country can entirely guarantee this today. The once common use of the term counterfeit to describe any drug that is not what it claims to be is at the heart of the argument. In a narrow, legal sense a counterfeit drug is one that infringes on a registered trademark. The lay meaning is much broader, including any drug made with intentional deceit. Some generic drug companies and civil society groups object to calling bad medicines counterfeit, seeing it as the deliberate conflation of public health and intellectual property concerns. Countering the Problem of Falsified and Substandard Drugs accepts the narrow meaning of counterfeit, and, because the nuances of trademark infringement must be dealt with by courts, case by case, the report does not discuss the problem of counterfeit medicines.
Download or read book Forensic Analysis on the Cutting Edge written by Robert D. Blackledge and published by John Wiley & Sons. This book was released on 2007-07-16 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title brings forensic scientists and chemists up-to-date on the latest instrumental methods for analysing trace evidence, including mass spectrometry, image analysis, DIOS-MS, ELISA characterization, statistical validation, and others. Illustrates comparative analysis of trace evidence by both old and new methods. Explains why some newer methods are superior to older, established methods. Includes chapters on analysis of DNA, ink, dyes, glitter, gun powder traces, condom trace evidence, footwear impressions, toolmark impressions, surveillance videos, glass particles, and dirt. Discusses applications such as mass spectrometry, image analysis, desorption-ionization on silicon mass spectrometry (DIOS-MS), ELISA characterization, and statistical validation.
Download or read book Handbook of Forensic Drug Analysis written by Fred Smith and published by Elsevier. This book was released on 2004-12-31 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Forensic Drug Analysis is a comprehensive chemical and analytic reference for the forensic analysis of illicit drugs. With chapters written by leading researchers in the field, the book provides in-depth, up-to-date methods and results of forensic drug analyses. This Handbook discusses various forms of the drug as well as the origin and nature of samples. It explains how to perform various tests, the use of best practices, and the analysis of results. Numerous forensic and chemical analytic techniques are covered including immunoassay, gas chromatography, and mass spectrometry. Topics range from the use of immunoassay technologies for drugs-of-abuse testing, to methods of forensic analysis for cannabis, hallucinogens, cocaine, opioids, and amphetamine. The book also looks at synthetic methods and law enforcement concerns regarding the manufacture of illicit drugs, with an emphasis on clandestine methamphetamine production. This Handbook should serve as a widely used reference for forensic scientists, toxicologists, pharmacologists, drug companies, and professionals working in toxicology testing labs, libraries, and poison control centers. It may also be used by chemists, physicians and those in legal and regulatory professions, and students of graduate courses in forensic science. Contributed to by leading scientists from around the world The only analysis book dedicated to illicit drugs of abuse Comprehensive coverage of sampling methods and various forms of analysis
Download or read book Ambient Ionization Mass Spectrometry written by Marek Domin and published by Royal Society of Chemistry. This book was released on 2014-11-25 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ambient ionization has emerged as one of the hottest and fastest growing topics in mass spectrometry enabling sample analysis with minimal sample preparation. Introducing the subject and explaining the basic concepts and terminology, this book will provide a comprehensive, unique treatise devoted to the subject. Written by acknowledged experts, there are full descriptions on how new ionization techniques work, with an overview of their strengths, weaknesses and applications. This title will bring the reader right up to date, with both applications and theory, and will be suitable as a tutorial text for those starting in the field from a variety of disciplines.
Download or read book Encyclopedia of Mass Spectrometry written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Techniques in Forensic Science written by Rosalind Wolstenholme and published by John Wiley & Sons. This book was released on 2021-01-26 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: An in-depth text that explores the interface between analytical chemistry and trace evidence Analytical Techniques in Forensic Science is a comprehensive guide written in accessible terms that examines the interface between analytical chemistry and trace evidence in forensic science. With contributions from noted experts on the topic, the text features a detailed introduction analysis in forensic science and then subsequent chapters explore the laboratory techniques grouped by shared operating principles. For each technique, the authors incorporate specific theory, application to forensic analytics, interpretation, forensic specific developments, and illustrative case studies. Forensic techniques covered include UV-Vis and vibrational spectroscopy, mass spectrometry and gas and liquid chromatography. The applications reviewed include evidence types such as fibers, paint, drugs and explosives. The authors highlight data collection, subsequent analysis, what information has been obtained and what this means in the context of a case. The text shows how analytical chemistry and trace evidence can problem solve the nature of much of forensic analysis. This important text: Puts the focus on trace evidence and analytical science Contains case studies that illustrate theory in practice Includes contributions from experts on the topics of instrumentation, theory, and case examples Explores novel and future applications for analytical techniques Written for undergraduate and graduate students in forensic chemistry and forensic practitioners and researchers, Analytical Techniques in Forensic Science offers a text that bridges the gap between introductory textbooks and professional level literature.
Download or read book Pulsed Electrochemical Detection in High Performance Liquid Chromatography written by William R. LaCourse and published by Wiley-Interscience. This book was released on 1997-08-18 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reliable, comprehensive, relevant view of HPLC and its applications The development of HPLC-PED represents the successful marriage of two powerful analytical technologies and has resulted in the best technique for sensitive and direct detection of biological compounds with poor optical detection properties. PED has been used extensively for the determination of carbohydrates and other polar aliphatic compounds, and as a result, numerous methods have been developed to enable the analysis of a wide variety of samples. Over the years, many articles, anecdotal information, and misinformation have permeated the scientific community, with the possible consequence of confusion or uncertainty with regard to PED on the part of the analyst. Pulsed Electrochemical Detection in High-Performance Liquid Chromatography presents a reliable, comprehensive, and relevant review of HPLC-PED and its applications. The book is divided into three major parts: background material necessary for a more thorough understanding of the principles and relevance of PED; an in-depth discussion of PED using voltammetry and other electroanalytical techniques and presenting the advantages, applicability, and optimization of all existing PED waveforms; and practical aspects of HPLC-PED, including a summary of the major applications and a look at future developments in the technique. Appendices include a pulsed voltammetry (PV) program specifically written to optimize pulsed amperometric detection (PAD) waveforms and all the known applications, categorized and listed in tabular form. For analytical chemists; biochemists; carbohydrate chemists; biotechnologists; undergraduate, graduate, and postdoctoral students; and lab technicians working in a range of areas including the pharmaceutical, medical, and food and beverage industries, this eminently readable guide is the first reliable book-length treatment of how to use PED coupled with HPLC.
Download or read book Analysis of Drugs of Abuse written by Rabi A. Musah and published by Humana Press. This book was released on 2018-07-05 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume features a comprehensive set of protocols featuring a range of both old and new technologies that can be used to analyze drugs of abuse, including prescription drugs, new psychoactive substances and psychoactive plants. Chapters guide readers through the application of color tests, light microscopy-based particle imaging, GC-MS, Raman spectroscopy, capillary electrophoresis, ultra-high performance LC-tandem MS, DART-MS, MALDI-mass spectrometry imaging, LC-MS/MS and HPLC-ESI-MS/MS to the analysis of abused drugs in wastewater, hair, urine and plant-derived materials, among other matrices. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and cutting-edge, Analysis of Drugs of Abuse aims to ensure successful results in the further study of this vital field.
Download or read book The Analysis of Explosives written by Jehuda Yinon and published by Elsevier. This book was released on 2013-10-22 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Analysis of Explosives surveys the principles of the various analytical methods, describes how these methods are used for the analysis of explosives, and reviews the major analytical work carried out in this field. Organized into 15 chapters, this book begins with the classification of explosives. Subsequent chapters discuss the different methods for the analysis of explosives. The detection and identification of explosive residues and hidden explosives are also explained. This monograph will be useful as a reference book for chemists in analytical and forensic laboratories, as well as a textbook for graduate students in analytical chemistry and forensic sciences.
