2 edition of Aqueous solution sampling and the effects of water vapor in glow discharge mass spectrometry found in the catalog.
Written in English
|Statement||by Philip H. Ratliff|
|The Physical Object|
|Pagination||ix, 228 leaves :|
|Number of Pages||228|
WASTEWATER ANALYSIS BY GAS CHROMATOGRAPHY/MASS SPECTROMETRY By Gregory K. Brown, Steven D. Zaugg, and Larry B. Barber ABSTRACT The U.S. Geological Survey National Water Quality Laboratory and National Research Program have developed a custom analytical method for the determination of compounds typically found in domestic and File Size: KB. Aqueous solution sampling and the effects of water vapor in glow discharge mass spectrometry Miscellaneous Ratliff, P.H. Glow discharge mass spectrometry is a technique for the analysis of trace elements in solid materials.
An ion source is described in which any one of a number of samples on a single filament can be analyzed at will. The operation of the source is based on the effects of potential variations along the length of the filament. Results obtained and possible applications are discussed. (auth. Water by Direct Aqueous Injection–High-Performance. Liquid Chromatography/Tandem Mass Spectrometry. Chapter 10 of. Section B, Methods of the National Water Quality Laboratory. Book 5, Laboratory Analysis. U.S. Department of the Interior U.S. Geological Survey. Techniques and Methods 5–B10Cited by:
Due to the high surface tension of water ( N/m), spraying of pure aqueous solution is known to have higher ESI onset voltage compared to organic solvent mixtures (e.g. 50 v/v% methanol/water solution). Thus, even with pneumatic assistance, it is rather difficult to achieve stable and efficient electrospray ionization for aqueous solution Cited by: 4. tandem mass spectrometry (IC-ESI-MS/MS) method for the determination of haloacetic acids in finished drinking water. Bromate and dalapon (2,2-dichloropropionic acid) may be measured concurrently with the haloacetic acids. Real time, chromatographic separation of common anions in drinking water (matrix elimination) is a key feature of this method.
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Aqueous solution sampling and the effects of water vapor in glow discharge mass spectrometry by philip h. ratliff a dissertation presented to the graduate school of the university of florida in partial fulfillment of the requirements for the degree of doctor of philosophy university of florida this work is dedicated to my parents, whose love.
The effects of water vapor in glow discharge mass spectrometry. Abstract. Glow discharge mass spectrometry is used to determine various effects of water vapor on glow discharge plasma processes.
The detrimental effects that water can have on both atomization and ionization in the plasma are by: Aqueous solution sampling and the effects of water vapor in glow discharge mass spectrometry.
By Philip H Ratliff. Abstract (Thesis) Thesis (Ph. D.)--University of Florida, (Bibliography) Includes bibliographical references (leaves )(Statement of Responsibility) by Philip H.
Ratliff Glow discharges (lcsh Author: Philip H Ratliff. A new, low power ionization source for elemental MS analysis of aqueous solutions is described. The liquid sampling-atmospheric pressure glow discharge (LS-APGD) operates by a process wherein the surface of the liquid emanating from a 75 μm i.d.
glass capillary acts as the cathode of the direct current glow by: Self-Consistent Solution for Glow Discharge Equations Aqueous solution sampling and the effects of water vapor in glow discharge mass spectrometry / Glow discharge.
The liquid sampling-atmospheric pressure glow discharge (LS-APGD) operates by a process wherein the surface of the liquid emanating from a 75 μm i.d. glass capillary. The integration of the liquid sampling-atmospheric pressure glow discharge (LS-APGD) ion source with Orbitrap mass spectrometers has resulted in new opportunities in the field of isotope ratio mass spectrometry.
In a field that has been dominated by thermal ionization mass spectrometry (TIMS) and inductively coupled plasma mass spectrometry (ICP-MS) Cited by: 3. Glow discharge sources have shown impressive analytical performance, cost effectiveness, and versatility but have traditionally been ill-suited for the analysis of liquids or solutions.
However, in recent years, glow discharges operated at atmospheric pressure have shown progress in this direction. In particular, glow discharges have been operated with the solution to be analyzed Cited by: GLOW DISCHARGE MASS SPECTROMETRY ions directly sputters neutral and ionized analyte atoms.
Mass analysis of the secondary ions provides analytical data for the determination of elemental concentrations in the sample. The chemical nature of the matrix con-trols not only the rate at which sample atoms are rel. O17 Depth Profile Analyses by Glow Discharge Mass Spectrometry and Ion Implantation.
Marisa Di Sabatino. O18 Comparison of GDMS and SIMS Depth Profile Analysis Results of Several Layered Systems Like CIGS, TiN/Fe and (TiVZrNbHf)N/Fe Piotr Konarski. O19 Measurement of Copper Diffusivity in Silicon by Glow Discharge Mass File Size: 1MB.
A small diameter etcched‐tip capillary has been incorporated into a pressure‐infusion electrospray ionization source. The ability to electro‐spray aqueous solutions without the use of an ancillary sheath flow is demonstrated with several biopolymers.
mass spectrometry, is the so-called Grimm source(8) and derivations of it. Fundamental Glow Discharge Processes The fundamental processes occurring in the discharge deﬁne a number of discrete regions.
In this article, only three regions – the cathode dark space, the negative glow, and the anode region – are deﬁned, because theFile Size: 1MB.
In contrast, the discharge sources like glow or barrier discharge are more easily stabilized under reduced pressure. 33,34) Due to the high surface tension of water ( N/m), spraying of pure aqueous solution is known to have higher ESI onset voltage compared to organic solvent mixtures (e.g.
50 v/v% methanol/water solution). Thus, even with Cited by: 4. Ambient imaging mass spectrometry by electrospray ionization using solid needle as sampling probe. Preliminary study of Microfabricated Glow Discharge Plasma for Mass Spectrometry Imaging, Chinese Journal of Analytical Reversible Protonation–Deprotonation Behavior in Aqueous Solutions, European Journal of Cited by: Solute molecules pass the membrane together with the water and can be analyzed using CI-MS and tandem mass spectrometry (MS-MS).
Glow discharge, instead of a filament, is used to ionize the reagent gas, since the high water pressure was found to shorten the filament lifetime to a Cited by: Matrix Effects in Mass Spectrometry Combined with Separation Methods — Comparison HPLC, GC and Discussion on Methods to Control these Effects.
By Luigi Silvestro, Isabela Tarcomnicu and Simona Rizea Savu. Submitted: May 31st Reviewed: January 28th Published: May 29th DOI: /Cited by: An analysis of the toxic metal of mercury in an aqueous solution of HgCl 2 was carried out by laser-induced breakdown spectroscopy with the assistance of a solution cathode glow discharge.
The liquid sample was converted to the gas phase through a high voltage DC discharge, and then the generated mercury vapor was concentrated by by: Direct analysis of trace elements in high-purity conductive materials.
Providing complete material characterization mainly for metallurgy, the Thermo Scientific Element GD Plus GD-MS system features a fast glow discharge ion source in a high-resolution mass spectrometer. Solution–cathode glow discharge – optical emission spectrometry of a new design and using a compact spectrograph Todd A.
Doroski et al Journal of Analytical Atomic Spectrometry 28 Crossref. Determination of potassium and sodium ions with diaphragm glow discharge plasma in aqueous solution. The mass spectrometer here is Orbitrap Exactive from Thermo Fisher Scientific. Solvents for a) & c) are pure water, and b) & d) are 10 mM ammonium acetate (NH 4 Ac) aqueous solution.
a) & b) are positive (+ve) ion mass spectra, and c) & d) are negative (−ve) ion mass by: 3. Contact Info. Stuart Chalk, Ph.D. Department of Chemistry University of North Florida Phone: Fax: Email: [email protected] Website: @unf.A technique for the analysis of microliter volumes of solution by glow discharge mass spectrometry (GDMS) has been successfully demonstrated.
Cathode preparation involves mixing analiquot of the samplesolutionwith a pureconductingpowder,followed bydrying and pressing before conventional GDMS by: The Ion Source. A glow discharge occurs when a potential difference is applied between two electrodes in a cell filled with gas (in most cases Ar) at reduced pressure.
In a configuration for elemental analysis the sample acts as the cathode, and its surface is sputtered by impac- File Size: 1MB.