Download or read book Selective Gas Chromatographic Detection of Vapor Phase Organics in Ambient Air written by JW. Bozzelli and published by . This book was released on 1980 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-resolution capillary-column gas chromatography (GC) efficiently separates the many organic compounds that exist in ambient air. However, the identification of these compounds by retention times alone is difficult. The response ratios of sample components on several different types of GC detectors can be used to identify selected peaks more positively. Electron capture (ECD), photoionization (PID), and flame ionization (FID) detectors have been evaluated in this study. Samples split between an ECD and FID are readily analyzed for such electron-capturing species as carbon tetrachloride and tetrachloroethylene. Replicate samples are run on a PID for identification of peaks due to aromatic compounds and other unsaturated materials. This system of three detectors gives sufficient information to confirm the identity of the compounds that have been chosen for quantitation.

Download or read book Sampling and Analysis of Toxic Organics in the Atmosphere American Society for Testing and Materials ASTM symposium Boulder CO August 6 9 1979 written by Sievers RE. and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas Chromatographic and Mass Spectrometric Analysis of Volatile Organics in the Atmosphere; Organics in Air, Sampling and Identification; Polyurethane Foam and Selected Sorbents as Collection Media for Airborne Pesticides and Polychlorinated Biphenyls; OSHA's Wipe Sampling Policies and Procedures; Measurement of Contamination from PCB Sources; Selective Gas Chromatographic Detection of Vapor Phase Organics in Ambient Air; Nitrosamine Air Sampling Using a New Artifact-Resistant Solid Sorbent System; Chemical Analysis of Diesel Particulate Matter and an Evaluation of Artifact Formation; Analysis of Organic, Elemental, and Carbonate Carbon in Ambient Aerosols; Origin of Carbonaceous Species in the Atmosphere Deduced by Radiocarbon; Laser Techniques for Analysis of Ambient Air; An Overview of the Use of Short Term Bioassays in Evaluation of Atmospheric Pollutants; Biological Exposure Sensors in Coal Conversion Technologies; Correlation of Air Concentrations and Biological Data; Sampling Rates and Other Considerations for Selected Passive Air Sampling Techniques; Calibration Techniques.

Download or read book Sampling and Analysis of Toxic Organics in the Atmosphere written by S. S. Verner and published by ASTM International. This book was released on 1980 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gas Chromatography in Air Pollution Analysis written by V.G. Berezkin and published by Elsevier. This book was released on 1991-04-25 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air pollution determination is one of the most important fields of gas chromatography application in practice. This book provides a systematic description of the main stages of air pollution determination, ranging from sampling problems to the quantitative estimation of the acquired data. Special attention is paid to the problem of gas, vapor, spray and solid particles extraction from air. The main methods of sampling procedure, namely, container utilization, cryogenic concentration, absorption, adsorption, chemisorption and filter usage, and successive impurities extraction are also handled. Sorption theory and the problems of sorption and desorption efficiency for hazardous impurities being extracted from traps with sorbents are discussed in detail. The practical utilization of different sorbents (silica, activated carbon, polymers etc.) to carry out sampling procedures for 200 main pollutants with known TLV (USSR and USA) is also considered. This highly informative book, reflecting several insufficiently known techniques as well as the experience of both western and Soviet researchers, should be of interest to both beginners and skilled researchers.

Download or read book Sensitive Selective Gas Chromatography Detection Based on Emission Spectrometry of Organic Compounds written by Stephen Shap Chow Tong and published by . This book was released on 1966 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Automated Cryogenic Sampling and Gas Chromatographic Analysis of Ambient Vapor phase Organic Compounds written by Karen D. Oliver and published by . This book was released on 1985 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sampling and Analysis of Toxic Organics in the Atmosphere written by and published by . This book was released on 1980 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High speed Analysis of Organic Vapors Using Vacuum outlet Gas Chromatography with Atmospheric pressure Air as Carrier Gas and Programmable Column Selectivity written by Andrew James Grall and published by . This book was released on 2000 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Automated Determination of Volatile Organic Contaminants in Ambient Air And or Soil Gas by Gas Chromatography with Selective Detectors written by E. Almasi and published by . This book was released on 1991 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volatile Organic Contaminants (VOCs) are major air pollutants in our environment. Whole air sampling has become the primary method for sampling air with EPA method TO-14. With this technique, an air sample is drawn through a cryogenically cooled trap to freeze out and concentrate VOC contaminants. The trap is then quickly heated and the VOCs are transferred to a cryogenically cooled column. Several variations and improvements have been studied: 1) automation for multiple samples, 2) use of a variable temperature absorption trap to eliminate cryogenics and a water removal device, and 3) elimination of the requirement for a cryogenically cooled oven. Two automated analytical systems are discussed: a fixed and a variable volume system. Precision, method detection limits, system linearity, and carryover are reported. Finally, ambient, dry-cleaner, and indoor air samples are analyzed using the techniques described.

Download or read book An Improved Method of Gas Chromatographic Determination of Trace Organic Vapors in Ambient Air Collected in Canisters written by Yong-jin Shen and published by . This book was released on 1988 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method for Concentrating and Determining Trace Organic Compounds in the Atmosphere written by and published by . This book was released on 1972 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determination of subpart-per-billion (sub-ppb) levels of volatile organic compounds in the atmosphere by flame ionization gas chromatography requires sample sizes of at least several hundred milliters of air. Cryogenic methods of concentrating trace compounds before analysis have the disadvantage of also concentrating large amounts of water, a serious problem in gas-liquid chromatography. A simple method was developed for sample collection and concentration using porous polymer adsorbants with the unique properties of high capacity for retention of organic compounds and minimal capacity for retention of water. This technique was used to determine sub-ppb levels of volatile organic compounds in a typical rural atmosphere. Probable sources of these organic compounds were vehicle exhaust, biological processes, natural gas leaks, and industrial chemicals.

Download or read book The Determination of Volatile Organic Compounds at the micro g 1 Level in Water by Gas Chromatography written by Thomas A. Bellar and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ambient air Gas chromatographic determination of gaseous organic compounds Fundamentals written by and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gas Chromatographic and Mass Spectrometric Analysis of Volatile Organics in the Atmosphere written by RM. Barkley and published by . This book was released on 1980 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trace-level vapor-phase organic components in tropospheric samples have been identified using combined glass capillary gas chromatography-mass spectrometry. Samples were collected on Tenax-GC sorbent from an aircraft sampling port at various locations over North America and the Atlantic and Pacific Oceans. The compounds found in these samples include n-alkanes (hexane to pentadecane), alkenes, benzene and alkylbenzenes, styrene, tetrachloroethylene, dichlorobenzenes, dimethyldisulfide, and benzaldehyde. The concentrations of benzene and toluene were determined to be in the range of

Download or read book Ambient air determination of volatile organic compounds especially ozone precursors gas chromatography method written by and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Assistance Document for Sampling and Analysis of Toxic Organic Compounds in Ambient Air written by and published by . This book was released on 1990 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Automated Cryogenic Sampling and Gas Chromatographic Analysis of Ambient Vapor phase Organic Compounds System Design written by Joachim D. Pleil and published by . This book was released on 1983 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: