Download or read book Analysis of Priority Pollutants by Gas Chromatography mass Spectrometry GC MS written by Jayant D. Shringarpure and published by . This book was released on 1984 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mass Spectrometry of Priority Pollutants written by Brian Middleditch and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: When the list of organic priority pollutants was first published, many mass spec troscopists went scrambling to their reference books. GC-MS was mandated for the analysis of 114 compounds, yet the spectra of many of them, if they had been recorded at all, were scattered throughout the literature. Moreover, it soon became apparent that, even if a sufficient number of instruments could be made available to undertake the task of monitoring 114 substances in the effluents of 21 categories of industry, the personnel could not be trained to perform the analyses and interpret the results. The solution to this problem has been the development of highly automated mass spectrometers which can be operated by personnel without the traditional research training. This book is for the new breed of mass spectroscopist who is not interested in the esoteric details of mass spectral fragmentation, but who merely wishes to identify specific pollutants in effluents. Our inclusion of com prehensive lists of synonyms and bibliographic data should make the book of even greater value to the reader who is not too familiar with the idiosyncrasies of chemical nomenclature and the scientific literature. The experienced mass spectroscopist should also benefit from having all of the data collected together in one volume. This is a book to be used, rather than deposited in a library distant from the laboratory: we would hope that it will fmd a place on top of every mass spectrometer used for the analysis of priority pollutants.
Download or read book Performance Tests for the Evaluation of Computerized Gas Chromatography mass Spectrometry Equipment and Laboratories written by William L. Budde and published by . This book was released on 1980 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitative Determination of Priority Pollutants Gas Chromatography Mass Spectrometry Response Factor Variation written by R. Devine and published by . This book was released on 1979 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The quantitative gas chromatography-mass spectroscopy-data system technique recommended by the Environmental Protection Agency for the determination of "extractable priority pollutants" in industrial effluent extracts has been evaluated. For standard solutions, the relative standard deviation (correlation coefficient) for selected priority pollutant response factors was considered as a measure of the precision of one aspect of the quantification of organic compounds in water extracts. It has been shown that for compounds similar in physical properties to the internal standard (anthracene-d10), single-level response factors can be determined at low nanogram levels with correlation coefficients as good as 1.2 percent. Data are presented that suggests that, for compounds that are "well behaved" from the viewpoint of consistent and reproducible gas chromatographic elution, the correlation coefficient of the response factor can be independent of the ion employed for quantification. Correlation coefficients of response factors for packed column and capillary column experiments demonstrated, not surprisingly, that response factor variation is compound dependent. For most cases cited, the relative standard deviation (RSD) of the response factor was less than 20 percent. However, for certain priority pollutants, response factor variation indicated that the recommended analysis protocol has serious deficiencies.
Download or read book Analysis of Priority Pollutants by Gc ms an Introduction written by Canada. Environment Canada. ENVIRONMENTAL PROTECTION SERVICE. WASTEWATER TECHNOLOGY CENTRE. and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computer Survey of GC MS Gas Chromatography MassSpectrometry Data Acquired in EPA s Environmental Protection Agency Priority Pollutant Screening Analysis written by W. M. Shackleford and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sampling and Analysis Procedures for Screening of Industrial Effluents for Priority Pollutants written by and published by . This book was released on 1977 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Priority Pollutants by GC MS an Introduction written by Canada. Dept. of the Environment. Environmental Protection Service and published by . This book was released on 1985 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EPA 600 4 written by and published by . This book was released on 1980-04 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EPA IERL RTP Procedures for Level 2 Sampling and Analysis of Organic Materials written by and published by . This book was released on 1979 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of Deuterated Organics as Internal Standards in Volatile Organic Analysis from Drinking Water and Wastewater by Computerized Gas Chromatography Mass Spectrometry written by RF. Devine and published by . This book was released on 1979 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method utilizing computerized gas chromatography-mass spectrometry (GC-MS) is presented for qualitative and quantitative determination of volatile organics in drinking waters, natural waters, or industrial effluent waters. It is based on the addition of deuterated internal standard, 1,2-dichlorethane-d4, to an appropriate-sized portion of sample and use of the Bellar-Lichtenberg method of purge-trap-desorb into determinative instrument. Method validation consisted of analyzing volatile priority pollutants at 2, 10, 50, 100, and 200 ppb with internal standard at 20 ppb in each of seven replicate analysis at each dose. Comparison of relative standard deviations (RSD) of internal and external standard methods of GC-MS analysis revealed no significant differences. This study also yielded valuable information concerning repeatability, reproducibility, stability of internal standard, linear dynamic range of GC-MS, and RSD variation with different area regenerations of diagnostic atomic mass units. Pollutant identification is based on retention time and total mass spectral comparison with authentic compound. Quantitation is based on measurement of the areas of retrieved diagnostic atomic mass unit regeneration of contaminant and internal standard. Using response factors determined from analysis of standard mixtures containing compounds of interest and internal standard, and the known mass of internal standard, the concentration is calculated. Lower detection limit for the volatile priority pollutants is approximately 1 ?g/litre. This method has detected several volatiles that are not Environmental Protection Agency priority pollutants.
Download or read book Advanced Techniques in Gas Chromatography Mass Spectrometry GC MS MS and GC TOF MS for Environmental Chemistry written by and published by Newnes. This book was released on 2013-09-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas chromatography mass spectrometry (GC-MS) has been the technique of choice of analytical scientists for many years. The latest developments in instrumentation, including tandem mass spectrometry (MS-MS) and time-of-flight (TOF) detectors, have opened up and broadened the scope of environmental analytical chemistry. This book summarizes the major advances and relevant applications of GC-MS techniques over the last 10 years, with chapters by leading authors in the field of environmental chemistry. The authors are drawn from academia, industry and government. The book is organized in three main parts. Part I covers applications of basic GC-MS to solve environmental-related problems. Part II focuses on GC-MS-MS instrumentation for the analyses of a broad range of analysis in environmental samples (pesticides, persistent organic pollutants, endocrine disruptors, etc.). Part III covers the use of more advanced GC-MS techniques using low- and high-resolution mass spectrometry for many applications related to the environment, food and industry. - Summarizes the major advances of GC-MS techniques in the last decade - Presents relevant applications of GC-MS techniques - Covers academic, industrial and governmental sectors
Download or read book An EPA Manual for Organics Analysis Using Gas Chromatography mass Spectrometry written by United States. Environmental Protection Agency. Environmental Monitoring and Support Laboratory and published by . This book was released on 1979 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Time resolved Phosphorescence Spectroscopy at Cryogenic Temperatures for the Environmental Analysis of Polycyclic Aromatic Sulfur Heterocycles in Oil Contaminated Sites written by Maha Al-Tameemi and published by . This book was released on 2017 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: The large volume of crude oil released into the Gulf of Mexico by the Deepwater Horizon (DWH) accident has raised considerable concerns over potential ecosystem impacts. The dispersion of harmful oil components into the ocean waters could pose long term risks to flora and fauna. Due to the complexity of oil contaminated sites, the unambiguous identification and quantitation of environmental pollutants often requires the sequence of high-performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS). A classic example is the analysis of the sixteen polycyclic aromatic hydrocarbons included in the priority pollutants list of the U.S. Environmental Protection Agency (EPA-PAHs).
Download or read book EPA 600 2 written by and published by . This book was released on 1980 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Novel Improvements on the Analytical Chemistry of Polycyclic Aromatic Hydrocarbons and Their Metabolites written by Wang Huiyong and published by . This book was released on 2010 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycyclic aromatic hydrocarbons (PAH) are important environmental pollutants originating from a wide variety of natural and anthropogenic sources. Because many of them are highly suspect as etiological agents in human cancer, chemical analysis of PAH is of great environmental and toxicological importance. Current methodology for PAH follows the classical pattern of sample preparation and chromatographic analysis. Sample preparation pre-concentrates PAH, simplifies matrix composition, and facilitates analytical resolution in the chromatographic column. Among the several approaches that exist to pre-concentrate PAH from water samples, the Environmental Protection Agency (EPA) recommends the use of solid-phase extraction (SPE). High-performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS) are the basis for standard PAH identification and determination. Ultraviolet (UV) absorption and room temperature fluorescence detection are both widely used in HPLC, but the specificity of these detectors is modest. Since PAH identification is solely based on retention times, unambiguous PAH identification requires complete chromatographic resolution of sample components. When HPLC is applied to "unfamiliar" samples, the EPA recommends that a supporting analytical technique such as GC-MS be applied to verify compound identification and to check peak-purity HPLC fractions. Independent of the volume of extracted water, the approximate time required to separate and determine the sixteen "priority pollutants" (EPA-PAH) via HPLC is approximately 60min. If additional GC-MS analysis is required for unambiguous PAH determination, the total analysis time will reach 2-3 hours per sample. If the concentrations of target species are found to lie outside the detector's response range, the sample must be diluted and the process repeated. These are important considerations when routine analysis of numerous samples is contemplated. Parent PAH are relatively inert and need metabolic activation to express their carcinogenicity. By virtue of the rich heterogeneous distribution of metabolic products they produce, PAH provide a full spectrum of the complexity associated with understanding the initial phase of carcinogenesis. PAH metabolites include a variety of products such as expoxides, hydroxyl aromatics, quinines, dihydrodiols, dioepoxides, tetrols and water soluble conjugates. During the past decades tremendous efforts have been made to develop bio-analytical techniques that possess the selectivity and sensitivity for the problem at hand. Depending on the complexity of the sample and the relative concentrations of the targeted metabolites, a combination of sample preparation techniques is often necessary to reach the limits of detection of the instrumental method of analysis. The numerous preparation steps open ample opportunity to metabolite loss and collection of inaccurate data. Separation of metabolites has been accomplished via HPLC, capillary electrophoresis (CE) and GC-MS. Unfortunately, the existence of chemically related metabolic products with virtually identical fragmentation patterns often challenges the specificity of these techniques. This dissertation presents significant improvements in various fronts. Its first original component--which we have named solid-phase nano-extraction (SPNE)--deals with the use of gold nanoparticles (Au NPs) as extracting material for PAH. The advantages of SPNE are demonstrated for the analysis of PAH in water samples via both HPLC and Laser-Excited Time-Resolved Shpol'skii Spectroscopy (LETRSS). The same concept is then extended to the analysis of monohydroxy-PAH in urine samples via SPE- HPLC and In-Capillary SPNE-CE. The second original component of this dissertation describes the application of Shpol'skii Spectroscopy to the analysis of polar PAH metabolites. The outstanding selectivity and sensitivity for the direct analysis of PAH at trace concentration levels has made Shpol'skii spectroscopy a leading technique in environmental analysis. Unfortunately, the requirement of a specific guest-host combination--typically a non-polar PAH dissolved in an n-alkane-- has hindered its widespread application to the field of analytical chemistry. This dissertation takes the first steps in removing this limitation demonstrating its feasibility for the analysis of polar benzopyrene metabolites in alcohol matrixes.
Download or read book Methods Development for Gas Chromatographic Analysis of Some Priority Pollutants written by John Robert Bickler and published by . This book was released on 1980 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
