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Determination Of Volatile Organic Compounds In Soils Using Equilibrium Headspace Analysis And Capillary Column Gas Chromatography Mass Spectrometry
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Book Synopsis Determination of Volatile Organic Compounds in Soils Using Equilibrium Headspace Analysis and Capillary Column Gas Chromatography/mass Spectrometry by : Pedro Flores
Download or read book Determination of Volatile Organic Compounds in Soils Using Equilibrium Headspace Analysis and Capillary Column Gas Chromatography/mass Spectrometry written by Pedro Flores and published by . This book was released on 1991 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination of Volatile Organic Compounds in Soils Using Equilibrum Headspace Analysis and Capillary Column Gas Chromatography/mass Spectrometry --evaluation of the Tekmar 7000 HA Analyzer by : Pedro Flores
Download or read book Determination of Volatile Organic Compounds in Soils Using Equilibrum Headspace Analysis and Capillary Column Gas Chromatography/mass Spectrometry --evaluation of the Tekmar 7000 HA Analyzer written by Pedro Flores and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior and Determination of Volatile Organic Compunds in Soil by : Marti Minnich
Download or read book Behavior and Determination of Volatile Organic Compunds in Soil written by Marti Minnich and published by . This book was released on 1993 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Identification of Soil Organics Using a Gas Chromatographic Mass Spectrometric Method by : William F. O'Reilly
Download or read book Identification of Soil Organics Using a Gas Chromatographic Mass Spectrometric Method written by William F. O'Reilly and published by . This book was released on 1974 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a study on the role of natural organics in determining the physical properties of soils, the use of combined gas chromatographic/mass spectrometric methods for identification of the more volatile organic chemicals in soils were explored. Soil was first treated at 100, 150, and 200C to select the optimum temperature where minimum pyrolysis of soil organic matter occurred. The vapors from three soils heated in a closed system at 150C were then analyzed. Subsequent refinement in technique involved collection of vapor from the three soils maintained at 150C using a constant flow sample holder/inlet system. About 50 organic compounds were identified. While application of this approach is restricted to the volatile compounds in the lower molecular weight range, conditions of analysis are thought to be suitable for identification of compounds originally present as opposed to pyrolysis products of soil organic matter. (Author).
Book Synopsis ORD Publications Announcement by : Center for Environmental Research Information (U.S.).
Download or read book ORD Publications Announcement written by Center for Environmental Research Information (U.S.). and published by . This book was released on 1995 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aqueous Extraction-Headspace/Gas Chromatographic Meth Od for Determination of Volatile Organic Compounds in Soils by :
Download or read book Aqueous Extraction-Headspace/Gas Chromatographic Meth Od for Determination of Volatile Organic Compounds in Soils written by and published by . This book was released on 1992 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study compares aqueous extraction-headspace/Gas Chromatography (GC) and the EPA SW-846 purge-and-trap-gas chromatography/mass spectrometry(Method 8240)for the determination of four common Volatile Organic Compounds (VOCs) in soils. Comparisons were made on two fortified soils and two contaminated field soils. In only two of the cases were consistent significant differences found-for the two most hydrophobic compounds in a high organic carbon soil, and for TCE in a field-contaminated soil that had previously shown slow aqueous VOC desorption. The findings strongly suggest that aqueous extraction-headspace/GC can be used not only to screen soils for VOCs giving same-day results, but often will provide results not significantly different from current laboratory based measurements.
Book Synopsis EPA National Publications Catalog by : United States. Environmental Protection Agency
Download or read book EPA National Publications Catalog written by United States. Environmental Protection Agency and published by . This book was released on 1995 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination of Organic Compounds in Soils, Sediments and Sludges by : T R Crompton
Download or read book Determination of Organic Compounds in Soils, Sediments and Sludges written by T R Crompton and published by CRC Press. This book was released on 1999-12-02 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first volume to comprehensively discuss the range of methods available for the analysis of organic compounds in soils, river and marine sediments and industrial sludges. It commences with a review of the instrumentation used in soil and sediment laboratories and indicates the types of organics that can be determined by each technique. Subsequent chapters discuss the analysis of various types of organics in a logical and systematic manner. It provides guidance on the applicability of techniques in certain environments, the advantages and disadvantages of using one method over another, likely interference, the sensitivity of particular techniques, and detection limits.
Book Synopsis Static Headspace-Gas Chromatography by : Bruno Kolb
Download or read book Static Headspace-Gas Chromatography written by Bruno Kolb and published by John Wiley & Sons. This book was released on 2006-06-23 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only reference to provide both current and thorough coverage of this important analytical technique Static headspace-gas chromatography (HS-GC) is an indispensable technique for analyzing volatile organic compounds, enabling the analyst to assay a variety of sample matrices while avoiding the costly and time-consuming preparation involved with traditional GC. Static Headspace-Gas Chromatography: Theory and Practice has long been the only reference to provide in-depth coverage of this method of analysis. The Second Edition has been thoroughly updated to reflect the most recent developments and practices, and also includes coverage of solid-phase microextraction (SPME) and the purge-and-trap technique. Chapters cover: * Principles of static and dynamic headspace analysis, including the evolution of HS-GC methods and regulatory methods using static HS-GC * Basic theory of headspace analysis-physicochemical relationships, sensitivity, and the principles of multiple headspace extraction * HS-GC techniques-vials, cleaning, caps, sample volume, enrichment, and cryogenic techniques * Sample handling * Cryogenic HS-GC * Method development in HS-GC * Nonequilibrium static headspace analysis * Determination of physicochemical functions such as vapor pressures, activity coefficients, and more Comprehensive and focused, Static Headspace-Gas Chromatography, Second Edition provides an excellent resource to help the reader achieve optimal chromatographic results. Practical examples with original data help readers to master determinations in a wide variety of areas, such as forensic, environmental, pharmaceutical, and industrial applications.
Book Synopsis Organic Compounds in Soils, Sediments & Sludges by : T Roy Crompton
Download or read book Organic Compounds in Soils, Sediments & Sludges written by T Roy Crompton and published by CRC Press. This book was released on 2012-11-29 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing awareness of the effects of pollutants in the eco-system and on the development of suitable methods of analysis has stimulated a lot of research recently. This volume comprehensively discusses the range of methods available for the analysis and determination of organic compounds in soils, river and marine sediments and industrial slu
Book Synopsis Sampling and Sample Preparation in Field and Laboratory by : Janusz Pawliszyn
Download or read book Sampling and Sample Preparation in Field and Laboratory written by Janusz Pawliszyn and published by Elsevier. This book was released on 2002-09-09 with total page 1170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title is the first comprehensive book on sampling and modern sample preparation techniques and has several main objectives: to facilitate recognition of sample preparation as both an integral part of the analytical process; to present a fundamental basis and unified theoretical approach for the professional development of sample preparation; to emphasize new developments in sample preparation technology; and to highlight the future impact of sample preparation on new directions in analytical science, particularly automation, miniaturization and field implementation. Until recently, there has been relatively little scientific interest in sampling and sample preparation, however this situation is presently changing as sampling and sample preparation become integral parts of the analytical process with their own unique challenges and research opportunities. Sampling and Sample Preparation for Field and Laboratory is an essential resource for all analytical chemists, and in particular those involved in method development. Not only does it cover the fundamental aspects of extraction, it also covers applications in various matrices and includes sampling strategies and equipment and how these can be integrated into the analytical process for maximum efficiency.
Book Synopsis Handbook of GC/MS by : Hans-Joachim Hübschmann
Download or read book Handbook of GC/MS written by Hans-Joachim Hübschmann and published by John Wiley & Sons. This book was released on 2008-07-11 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first comprehensive reference work for GC/MS. It offers broad coverage, from sample preparation to the evaluation of MS-Data, including library searches. Fundamentals, techniques, and applications are described. A large part of the book is devoted to numerous examples for GC/MS-applications in environmental, food, pharmaceutical and clinical analysis. These proven examples come from the daily practice of various laboratories. The book also features a glossary of terms and a substance index that helps the reader to find information for his particular analytical problem. The author presents in a consistent and clear style his experience from numerous user workshops which he has organized. This is a thoroughly revised and updated English edition based on an edition which was highly successful in Germany.
Download or read book Federal Register written by and published by . This book was released on 1995-07-20 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Water Analysis by : Leo M.L. Nollet
Download or read book Handbook of Water Analysis written by Leo M.L. Nollet and published by CRC Press. This book was released on 2007-06-25 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensively revised and updated, Handbook of Water Analysis, Second Edition provides current analytical techniques for detecting compounds in water samples. Maintaining the detailed and accessible style of the original, this edition demonstrates water sampling and preservation methods by enumerating different ways to measure chemical and radiologic
Book Synopsis Determination of Organic Compounds in Drinking Water by Liquid-solid Extraction and Capillary Column Gas Chromatography/mass Spectrometry by :
Download or read book Determination of Organic Compounds in Drinking Water by Liquid-solid Extraction and Capillary Column Gas Chromatography/mass Spectrometry written by and published by . This book was released on 1988 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Evaluation of Environmental Contaminants Using Static Headspace Gas Chromatography Mass Spectrometry, Vacuum Ultraviolet Detection and Ionic Liquids by : Emmanuel Varona -Torres
Download or read book The Evaluation of Environmental Contaminants Using Static Headspace Gas Chromatography Mass Spectrometry, Vacuum Ultraviolet Detection and Ionic Liquids written by Emmanuel Varona -Torres and published by . This book was released on 2021 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: In analytical chemistry the term "headspace" refers to the vapor that forms above a sample (liquid or solid) in a closed container. Headspace (HS) sampling is the method to promote partition between volatile components from the sample matrix and then analyzed by gas chromatography (GC). HS is an excellent technique to introduce a"clean" vapor sample into the GC and avoids introduction of non-volatile components from the sample matrix and often used for determination of volatile organic compounds (VOCs) with minimal or no additional sample preparation. Concerns about the environmental impact of fossil fuel extraction techniques (i.e.,hydraulic fracturing and other well stimulation techniques) have risen due to its expansion in the United States and other countries. Robust atmospheric studies have attributed to the emissions of rogue greenhouse gases and VOCs to mechanical inefficiencies commonly found in the midstream production process, such as gas flaring stations, condensate tanks, and pipelines. However, the interplay between fossil fuel extraction activities and soil quality has not received much attention. Utilizing headspace gas chromatography mass spectrometry (HS-GC-MS) and an establish standard method by the Environmental Protection Agency (EPA), we present a study of soil near oil and gas production in verified emissions of volatile contaminants. The findings provide an initial indication of the interactions between atmospheric VOCs contamination events and the accumulation of those contaminants in soil where, varying soil texture was found to contribute to total amount detected. Room temperature ionic liquids (RTILs) have received significant attention in HS analysis due to their unique physiochemical properties (i.e., negligible vapor pressures, tunable thermal stabilities, tunable viscosities and wide liquid range). RTILs are salts in which ions are poorly coordinated, resulting in a liquid state at room temperature. The evaluation of RTILs as co-solvent in soil analysis, in an effort to increase sensitivity, reduce and normalized the matrix-effects associated with varying soil compositions. It was found that hydrophilic RTILs investigated, 1-ethyl-3-methylimidazolium ethylsulfate ([EMIM][ESO4]), 1-ethyl-3-methylimidazolium diethyl phosphate ([EMIM][DEP]), tris(2-hydroxyethyl)methylammonium methylsulfate ([MTEOA][MeOSO3]), reduced matrix-effect from varying soil composition thus, reducing the need to characterized and matrix-match soil textures for calibration purposes. It also reduced the analysis time and increased precision and accuracy for the quantification of VOCs in variable soil matrices relative to standard methods. Understanding the thermodynamic interactions between an analyte and the sample phase is of paramount importance when eliciting a co-solvent in HS analysis. The partition coefficient (KP) is an equilibrium constant that describes the distribution of the analyte between two phases (i.e., sample phase/ gas phase). Kp determinations by HSGC is acquired by two methods: vapor phase calibration (VPC) and phase ratio variation (PRV). Kp determinations of analytes in HS co-solvents can help guide the analyst in which to use for the analysis at hand. Here we demonstrate the ability of using a pressurized - loop HS system in conjunction with gas chromatography vacuum ultraviolet detection (HS-GC-VUV) to directly calculate the concentration of the analyte in the gas phase, by pseudo-absolute quantification (PAQ), thus allowing for quick determination of Kp and other thermodynamic properties such as enthalpy ( ∆H )and entropy (∆S ) of the system. The Kp determinations by PAQ were comparable to those obtained using theVP C method, with differences in the average values ranging
Book Synopsis Soil Sampling and Analysis for Volatile Organic Compounds by :
Download or read book Soil Sampling and Analysis for Volatile Organic Compounds written by and published by . This book was released on 1991 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
