Download or read book Development Calibration and Deployment of an Airborne Chemical Ionization Mass Spectrometer for Trace Gas Measurements written by Talat Khattatov 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 A Chemical Ionisation Mass Spectrometer for Atmospheric Trace Gas Measurement Characterisation and Deployment in Field Studies written by Philipp G. Eger 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 A Chemical Ionisation Mass Spectrometer for Atmospheric Trace Gas Measurement Characterisation and Deployment in Field Studies written by Philipp G. Eger and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Specific Ion Mass Spectrometric Detection for Gas Chromatographic Pesticide Analysis written by Maynard B. Neher and published by . This book was released on 1974 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Airborne Measurements of Trace Gases Using a Chemical Ionisation Mass Spectrometer CIMS Onboard the FAAM BAe 146 Research Aircraft written by Michael Robert Le Breton and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development and Deployment of an Airborne Gas Chromatography Mass Spectrometer to Measure Tropospheric Volatile Organic Compounds written by Jamie K. Minaeian and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of an Ion Mass Spectrometer and Sounding Rocket System for D region Cluster ion Measurement written by A. Bailey and published by . This book was released on 1982 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Ion Mass Spectrometer and supporting Sounding Rocket System were developed to make in situ measurements of cluster-ions in the D-region of the ionosphere. A cryogenically vacuum-pumped quadrupole mass filter and secondary emission ion counter are coupled to make mass spectral measurements of positive and negative ion composition in ambient gas sampled at the apex of a cone designed to attach the shock wave induced by supersonic sounding rocket speeds. (Author).

Download or read book Deployment of a Chemical Ionization Mass Spectrometer During the Brace written by Lewis Huey and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies in Chemical Ionization Mass Spectrometry written by Jean H. Futrell and published by . This book was released on 1975 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: These research efforts have involved studies in chemical ionization mass spectrometry which have led to improved instrumentation, techniques and methodology for trace analysis. Much of the work has emphasized instrumental developments. These have included the development of high pressure ion sources for chemical ionization studies with a high resolution mass spectrometer, the development of super pressure (20 torr) ion sources for exploring maximum sensitivity of chemical ionization mass spectrometry, and, most recently, the development of combined gas chromatography-electron impact-chemical ionization mass spectrometry using a dual source, dual-beam mass spectrometer. This report describes some applications of the latter instrument plus the computer software developed for accumulation of data and data reduction. (Author).

Download or read book Atmospheric Trace Gas Measurements Using Chemical Ionisation Time of Flight Mass Spectrometry written by Yun Li and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Formic and Acetic Acid in Air by Chemical Ionization Mass Spectroscopy written by Victoria Treadaway and published by . This book was released on 2015 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Field Portable Mass Spectrometer for Quantitative Analysis of Volatile Organic Compounds in Air written by Nicholas Davey and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The typical strategy for atmospheric analysis of volatile organic compounds(VOCs), is to collect discrete samples which are then transported to a laboratory foranalysis. This method has limited spatial and temporal resolution, and can be bothcostly and time consuming. To overcome these limitations, a mobile monitoringplatform was developed for real-time quantitative chemical analysis. This workdescribes the development of membrane introduction mass spectrometer andidenti es the necessary requirements to make a reliable and e ective instrument forin-situ chemical analysis. These include, the integration of a membrane interfacewith a miniaturized mass spectrometer, development of a data managementstrategy, reducing the e ects of isobaric interferences and employing an internalstandard for quantitative measurements. Furthermore, the negative e ects ofenvironmental variables, such as the Earth's magnetic eld, were examined ande ectively eliminated. In addition, this work demonstrates quantitative mapping ofatmospheric VOCs in real-time, which allows rapid identi cation of chemical plumesand therefore, areas of potential concern. Both lab and eld-based comparisons ofivmembrane introduction mass spectrometer data and traditional whole air samplingcanister data were undertaken. The primary eld site was near Ft. McMurray, ABwhere baseline data was collected around a steam assisted gravity drainage (SAGD)facility and surrounding public roads. Monitoring for fugitive emissions at thisfacility and surrounding bitumen mining and processing operations is demonstrated.Field data were also obtained, near an industrial site in Ft.Saskatchewan, AB, thatdemonstrate the e cacy of an adaptive sampling strategy. Finally, chemicalionization was investigated as a soft ionization strategy to improve chemicalselectivity for the analysis of complex hydrocarbon mixtures. The development of anin-line liquid chemical ionization reagent delivery system is presented and proposedas an e ective strategy for eliminating interferences arising from biogenic terpenesand alkyl aromatics. In all, this thesis presents the design and implementation of amobile membrane introduction mass spectrometer for atmospheric chemicalanalysis. Results that improve performance and demonstrate the novelty of thedata-type are provided, along with avenues for future development.

Download or read book The Development and Calibration of a New Mass Spectrometer for Upper Atmospheric Research written by Heidi Lynn Kennedy Manning and published by . This book was released on 1995 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Identification and Quantitative Measurements of Chemical Species by Mass Spectrometry written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of a miniature gas chromatograph/mass spectrometer system for the measurement of chemical species of interest to combustion is described. The completed system is a fully-contained, automated instrument consisting of a sampling inlet, a small-scale gas chromatograph, a miniature, quadrupole mass spectrometer, vacuum pumps, and software. A pair of computer-driven valves controls the gas sampling and introduction to the chromatographic column. The column has a stainless steel exterior and a silica interior, and contains an adsorbent of that is used to separate organic species. The detection system is based on a quadrupole mass spectrometer consisting of a micropole array, electrometer, and a computer interface. The vacuum system has two miniature pumps to maintain the low pressure needed for the mass spectrometer. A laptop computer uses custom software to control the entire system and collect the data. In a laboratory demonstration, the system separated calibration mixtures containing 1000 ppm of alkanes and alkenes.Zondlo, Mark A. and Bomse, David S.Glenn Research CenterMASS SPECTROMETERS; GAS CHROMATOGRAPHY; QUADRUPOLES; ALKENES; SILICON DIOXIDE; ELECTROMETERS; DETECTION; ALKANES; VACUUM PUMPS; MINIATURIZATION; LABORATORY EQUIPMENT

Download or read book Chemical Ionization Mass Spectrometry written by DP. Beggs and published by . This book was released on 1974 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need for a rapid and accurate method for drug analysis has increased substantially in this country over the past few years. This has been due in large part to the rise in drug abuse and overdose cases now being handled by toxicologists and analytical chemists. In an effort to meet this need, recent applications of the gas chromatograph/mass spectrometer (GC/MS) to drug and drug metabolite analysis has been successfully accomplished [1,2]. This application has recently been enhanced by the development of a new technique--chemical ionization (CI). The CI technique provides simpler spectra with increased sensitivity, while allowing the optional deletion of the gas chromatograph.

Download or read book Missionssange udgivne af Peter Jacobsen written by and published by . This book was released on 1898 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Influencia da cultura em vasos sobre o desenvolvimento das plantas. Influencia da capacidade dos recipientes que se empregam na cultura das plantas. Inconvenientes dos reenvasamentos repetidos. Influencia da porosidade dos vasos empregados em horticultura. Disposicao dos vasos. Escolha das terras para as cultura em vasos. Rega das plants cultivadas em vasos. Oportunidade dos adubos nas culturas em vasos. Aplicacao dos adubos as culturas em vasos.

Download or read book An Improved Chemical Ionization Mass Spectroscopy System written by Jean H. Futrell and published by . This book was released on 1973 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report concerns the development of a sophisticated and versatile medium resolution chemical ionization mass spectrometer. Because of special features of the ion source and optics the sensitivity of this apparatus exceeds by orders of magnitude the capabilities of previous instrumentation. A new ion source and related sample handling modifications based upon the design and testing of this spectrometer has been provided for the DuPont Model 490 mass spectrometer. A versatile interface for computer operation of mass spectrometer systems coupled to a PDP 11/20 computer has also been designed. Hardware and software developed for this purpose are described. Some preliminary results using an interfaced gas chromatograph/chemical ionization mass spectrometer/computer system are presented. (Modified author abstract) Portions of this document are not fully legible.