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Author : Masoud Agah
Publisher :
ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.3/5 (91 download)
Download or read book Low-power Temperature-programmed Micro Gas Chromatography Columns written by Masoud Agah and published by . This book was released on 2005 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kensall D. Wise
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (316 download)
Download or read book A Low-power Pressure-and Temperature-programmed Separation System for a Micro Gas Chromatograph written by Kensall D. Wise and published by . This book was released on 2006 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the theory, design, fabrication and testing of the microvalves and columns necessary in a pressure- and temperature-programmed micro gas chromatograph ({micro}GC). Two microcolumn designs are investigated: a bonded Si-glass column having a rectangular cross section and a vapor-deposited silicon oxynitride (Sion) column having a roughly circular cross section. Both microcolumns contain integrated heaters and sensors for rapid, controlled heating. The 3.2 cm x 3.2 cm, 3 m-long silicon-glass column, coated with a non-polar polydimethylsiloxane (PDMS) stationary phase, separates 30 volatile organic compounds (VOCs) in less than 6 min. This is the most efficient micromachined column reported to date, producing greater than 4000 plates/m. The 2.7 mm x 1.4 mm Sion column eliminates the glass sealing plate and silicon substrate using deposited dielectrics and is the lowest power and fastest GC column reported to date; it requires only 11 mW to raise the column temperature by 100 C and has a response time of 11s and natural temperature ramp rate of 580 C/min. A 1 m-long PDMS-coated Sion microcolumn separates 10 VOCs in 52s. A system-based design approach was used for both columns.
Author : Joseph A. Potkay
Publisher :
ISBN 13 :
Total Pages : 266 pages
Book Rating : 4.3/5 (91 download)
Download or read book A Low-Power Pressure- and Temperature-Programmed Separation for a Micro Gas Chromatograph written by Joseph A. Potkay and published by . This book was released on 2006 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Eugene F. Barry
Publisher : John Wiley & Sons
ISBN 13 : 0470114177
Total Pages : 315 pages
Book Rating : 4.4/5 (71 download)
Download or read book Columns for Gas Chromatography written by Eugene F. Barry and published by John Wiley & Sons. This book was released on 2007-04-27 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Choosing the right column is key in Gas Chromatography Gas Chromatography (GC) is the most widely used method for separating and analyzing a wide variety of organic compounds and gases. There have been many recent advancements in both packed column and capillary column GC. With numerous options and considerations, selecting the right column can be complicated. This resource provides essential guidance for scientists and technicians, including: Methods of choosing both capillary and packed columns Selection of dimensions (column length, I.D., film thickness, etc.) and type of column Guidelines for proper connections of the column to the injector and detector United States Pharmacopeia and National Formulary chromatographic methods ASTM, EPA, NIOSH, and OSHA column selection specifications Information on the advantages of computer assistance in GC and multidimensional GC Comprehensive information on column oven temperature control Columns for Gas Chromatography: Performance and Selection is a hands-on reference for scientists and technicians using GC.
Author : Manabu Tokeshi
Publisher : MDPI
ISBN 13 : 3038425346
Total Pages : 229 pages
Book Rating : 4.0/5 (384 download)
Download or read book Micro/Nano Devices for Chemical Analysis written by Manabu Tokeshi and published by MDPI. This book was released on 2018-07-03 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Micro/Nano Devices for Chemical Analysis" that was published in Micromachines
Author : Anzi Wang
Publisher :
ISBN 13 :
Total Pages : 143 pages
Book Rating : 4.:/5 (18 download)
Download or read book Microchip Thermal Gradient Gas Chromatography written by Anzi Wang and published by . This book was released on 2014 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the airbath oven is a reliable heating method for gas chromatography (GC), resistive heating is needed for higher analytical throughput and on-site chemical analysis because of size, heating rate and power requirements. In the last thirty years, a variety of resistive heating methods were developed and implemented for both benchtop and portable GC systems. Although fast heating rates and low power consumption have been achieved, losses in column efficiency and resolution, complex construction processes and difficulties experienced in recovering damaged columns have also become problematic for routine use of resistively heated columns. To solve these problems, a new resistively heated column technique, which uses metal columns and self-insulated heating wires, was developed for capillary gas chromatography. With this method, the total thermal mass was significantly less than in commercial column assemblies. Temperature-programming using resistive heating was at least 10 times faster than with a conventional oven, while only consuming 1−5% of the power that an oven would use. Cooling a column from 350 °C to 25 °C with an air fan only required 1.5 min. Losses in column efficiency and peak capacity were negligible when compared to oven heating. The major trade-off was slightly worse run-to-run retention time deviations, which were still acceptable for most GC analyses. The resistively heated column bundle is highly suitable for fast GC separations and portable GC instruments.
Author : Jared Anderson
Publisher : John Wiley & Sons
ISBN 13 : 3527333746
Total Pages : 2148 pages
Book Rating : 4.5/5 (273 download)
Download or read book Analytical Separation Science, 5 Volume Set written by Jared Anderson and published by John Wiley & Sons. This book was released on 2016-02-29 with total page 2148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endlich ein Forschungsleitfaden für Wissenschaftler des Fachgebiets, die neue Methoden entwickeln oder einsetzen. Dieses Handbuch umfasst fünf thematische Bände und bietet damit einen umfassenden Überblick über das Fachgebiet. Erläutert werden Grundlagen, die Methodenentwicklung und hochkarätige Anwendungen für alle wichtigen Analyseverfahren, darunter chromatische Verfahren, Techniken in den Bereichen Elektromigration und Membranen. Dieses Referenzwerk umfasst ein breites Spektrum und legt den Schwerpunkt auf Entwicklungen für die Zukunft. Damit ist es ein Muss für Forscher und eine wertvolle Wissensquelle für Studenten im Hauptstudium und Studienabsolventen.
Author : Konrad Grob
Publisher : John Wiley & Sons
ISBN 13 : 3527612882
Total Pages : 480 pages
Book Rating : 4.5/5 (276 download)
Download or read book Split and Splitless Injection for Quantitative Gas Chromatography written by Konrad Grob and published by John Wiley & Sons. This book was released on 2008-11-21 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive and unique handbook of split and splitless injection techniques has been completely revised and updated. This new edition offers: - New insights concerning sample evaporation in the injector - Information about matrix effects - A new chapter on injector design The real processes within the injector are for the first time visualized and explained by the CD-ROM included in the book. Furthermore the reader will understand the concepts of injection techniques and get a knowledge of the sources of error. The handbook also includes many practical guidelines. From reviews of former editions: "This substantial book is on injection techniques alone, which ... demonstrates this can have many pitfalls ... no one should be allowed to direct a laboratory doing quantitative analysis by GC without first being thoroughly familar with this book ..." The Analyst "This is a detailed reference volume filled with practical suggestions and techniques for managing split and splitless injection in the day-to-day world of the working gas chromatographer. It will be useful ... for anyone who must work hands-on with GC." Journal of High Resolution Chromatography
Author : Kevin Robards
Publisher : Academic Press
ISBN 13 : 012822097X
Total Pages : 532 pages
Book Rating : 4.1/5 (282 download)
Download or read book Principles and Practice of Modern Chromatographic Methods written by Kevin Robards and published by Academic Press. This book was released on 2021-12-03 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles and Practice of Modern Chromatographic Methods, Second Edition takes a comprehensive, unified approach in its presentation of chromatographic techniques. Like the first edition, the book provides a scientifically rigid, but easy-to-follow presentation of chromatography concepts that begins with the purpose and intent of chromatographic theory - the “what and why that are left out of other books attempting to cover these principles. This fully revised second edition brings the content up-to-date, covering recent developments in several new sections and an additional chapter on composite methods. New topics include sample profiling, sample preparation, sustainable green chemistry, 2D chromatography, miniaturization/nano-LC, HILIC, and more. Contains thorough chapters that begin with an updated schematic overview and a visual representation of the content Avoids the obfuscation of different terminologies and classification systems that are prevalent in the area, such as the relationship between liquid chromatography and column chromatography Provides integrated and comprehensive topic coverage based on chromatographic bibliometrics and survey reports on the relative usage of chromatographic techniques
Author : Chaudhery Mustansar Hussain
Publisher : Elsevier
ISBN 13 : 0128127937
Total Pages : 556 pages
Book Rating : 4.1/5 (281 download)
Download or read book Nanomaterials in Chromatography written by Chaudhery Mustansar Hussain and published by Elsevier. This book was released on 2018-06-08 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials in Chromatography: Current Trends in Chromatographic Research Technology and Techniques provides recent advancements in the wide variety of chromatographic techniques applied to nanotechnology. As nanomaterials' unique properties can improve detection sensitivity and miniaturize the devices used in analytical procedures, they can substantially affect the evaluation and analysis ability of scientists and researchers and foster exciting developments in separation science. The book includes chapters on such crucial topics as the use of nanomaterials in sample preparation and the legalization of nanomaterials, along with a section on reducing the cost of the analysis process, both in terms of chemicals and time consumption. - Presents several techniques for nanomaterials in chromatography, including well-known materials like carbon nanomaterials and functionalized nanomaterials - Includes suggested readings at the end of each chapter for those who need further information or specific details, from standard handbooks, to journal articles - Covers not only applications of nanomaterials in chromatography, but also their environmental impact in terms of toxicity and economic effects
Author : Walter Edgar Harris
Publisher : New York : J. Wiley
ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.F/5 ( download)
Download or read book Programmed Temperature Gas Chromatography written by Walter Edgar Harris and published by New York : J. Wiley. This book was released on 1966 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kazuaki Yazawa
Publisher : World Scientific
ISBN 13 : 9811218285
Total Pages : 389 pages
Book Rating : 4.8/5 (112 download)
Download or read book Thermoelectric Energy Conversion Devices And Systems written by Kazuaki Yazawa and published by World Scientific. This book was released on 2021-02-23 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique compendium emphasizes key factors driving the performance of thermoelectric energy conversion systems. Important design parameters such as heat transfer at the boundaries of the system, material properties, and form factors are carefully analyzed and optimized for performance including the cost-performance trade-off. Numbers of examples are provided on the applications of thermoelectric technologies, e.g., power generation, cooling of electronic components, and waste heat recovery in wearable devices.This must-have volume also includes an interactive modeling software package developed on the nanoHUB (https://nanohub.org/) platform. Professionals, researchers, academics, undergraduate and graduate students will be able to study the impact of material properties and key design parameters on the overall thermoelectric system performance as well as the large scale implementation in the society.
Author : Matthew S. Klee
Publisher : Hewlett-Packard, Avondale Division
ISBN 13 : 9781880313008
Total Pages : 132 pages
Book Rating : 4.3/5 (13 download)
Download or read book GC Inlets written by Matthew S. Klee and published by Hewlett-Packard, Avondale Division. This book was released on 1990-02-01 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temperature Programmable Microfabricated Gas Chromatography Column written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A temperature programmable microfabricated gas chromatography column enables more efficient chemical separation of chemical analytes in a gas mixture by the integration of a resistive heating element and temperature sensing on the microfabricated column. Additionally, means are provided to thermally isolate the heated column from their surroundings. The small heat capacity and thermal isolation of the microfabricated column improves the thermal time response and power consumption, both important factors for portable microanalytical systems.
Author : Colin Poole
Publisher : Elsevier
ISBN 13 : 0123855403
Total Pages : 754 pages
Book Rating : 4.1/5 (238 download)
Download or read book Gas Chromatography written by Colin Poole and published by Elsevier. This book was released on 2012-06-19 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: A single source of authoritative information on all aspects of the practice of modern gas chromatography, from theory, to methods, to selected applications. It also provides access to core data for practical work, comparison of results, and decision making and facilitates the search for sources in related areas of study.
Author : Raphael Haudebourg
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (879 download)
Download or read book Application of Sputtering to Micro Gas Chromatography written by Raphael Haudebourg and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A totally new solid stationary phase deposition technique for micro machined gas chromatography (GC) columns fabrication was proposed: to overcome the limitations of conventional liquid (or occasionally solid) stationary phases in terms of very volatile compounds retention and/or clean room batch production, an approach consisting of the collective direct deposition of the adsorbent in micro columns channels by sputtering was performed. The process was fully compatible with clean room fabrication flow and industry-ready, with very good precision results. Silica, alumina, graphite and magnesia were proven able to separate volatile hydrocarbons. Various types of columns (structure, stationary phase) were fabricated in the form of 2x2 cm2 silicon-Pyrex chips, and their thermodynamic and kinetic evaluations were reported. Retentions were observed to increase from magnesia to graphite through alumina and silica and with phase ratio decrease, as expected; very satisfying efficiencies were obtained: more than 5700 plates, and 250 μm-high plates. The possibility to use such columns for fast in-situ and autonomous monitoring of light hydrocarbons in oilfield environments was demonstrated by the implementation of a chip temperature-programming system and various versatility tests (high temperatures, carrier gas, humidity): a complete C1-C9 linear alkanes separation was performed in less than 15 seconds, as well as complex mixtures fast separations (isomers, unsaturated), and an industrial confidential application was developed and patented. Therefore, sputter-deposited stationary phase micro columns opened numerous perspectives for the developments of miniaturized GC apparatuses.
Author : Markku Tilli
Publisher : Elsevier
ISBN 13 : 012817787X
Total Pages : 1028 pages
Book Rating : 4.1/5 (281 download)
Download or read book Handbook of Silicon Based MEMS Materials and Technologies written by Markku Tilli and published by Elsevier. This book was released on 2020-04-17 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Silicon Based MEMS Materials and Technologies, Third Edition is a comprehensive guide to MEMS materials, technologies, and manufacturing with a particular emphasis on silicon as the most important starting material used in MEMS. The book explains the fundamentals, properties (mechanical, electrostatic, optical, etc.), materials selection, preparation, modeling, manufacturing, processing, system integration, measurement, and materials characterization techniques of MEMS structures. The third edition of this book provides an important up-to-date overview of the current and emerging technologies in MEMS making it a key reference for MEMS professionals, engineers, and researchers alike, and at the same time an essential education material for undergraduate and graduate students. - Provides comprehensive overview of leading-edge MEMS manufacturing technologies through the supply chain from silicon ingot growth to device fabrication and integration with sensor/actuator controlling circuits - Explains the properties, manufacturing, processing, measuring and modeling methods of MEMS structures - Reviews the current and future options for hermetic encapsulation and introduces how to utilize wafer level packaging and 3D integration technologies for package cost reduction and performance improvements - Geared towards practical applications presenting several modern MEMS devices including inertial sensors, microphones, pressure sensors and micromirrors
