Aqueous solution sampling and the effects of water vapor in glow discharge mass spectrometry

by Philip H. Ratliff

Written in English
Cover of: Aqueous solution sampling and the effects of water vapor in glow discharge mass spectrometry | Philip H. Ratliff
Published: Pages: 228 Downloads: 199
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Subjects:

  • Trace analysis,
  • Glow discharges,
  • Mass Spectrometry

Edition Notes

Statementby Philip H. Ratliff
The Physical Object
Paginationix, 228 leaves :
Number of Pages228
ID Numbers
Open LibraryOL24830710M
OCLC/WorldCa27669793

  Aqueous solutions: These may be diluted with water and sprayed. Plant and animal tissues: These are ashed by wet or dry ashing techniques and then a solution of ash is prepared in HCl. Metals as well as alloys: These are first dissolved in acid or alkali and the resulting solution is diluted with water. 58 Atomic absorption spectroscopy (AAS) and atomic emission spectroscopy (AES) is a spectroanalytical procedure for the quantitative determination of chemical elements using the absorption of optical radiation (light) by free atoms in the gaseous absorption spectroscopy is based on absorption of light by free metallic ions. In analytical chemistry the . Sigma-Aldrich Online Catalog Product List: Solvents and Solutions for Mass Spectrometry.   A solution-cathode glow discharge (SCGD) spectrometry apparatus may comprise an SCGD source and a mass or ion mobility spectrometer. A method for ionizing a molecular analyte may comprise contacting the molecular analyte with a plasma discharge to form ions and separating the ions in a mass spectrometer or ion mobility by: 3.

Dimethylamine aqueous solution. ARQE0Q. CHEBI ROSDSFDQCJNGOL-UHFFFAOYSA-N. Dimethylamine solution (over 55% but not over 65%) Dimethylamine solution (45% or less) Dimethylamine solution (over 45% but not over 55%) Dimethylamine, purum, >=%. MFCD Dimethylamine, 26 wt.% solution in water. Dimethylamine, 40 wt.% solution . electrospray mass spectrometry (ES-MS) for the determination of both organic and inorganic compounds in aqueous solutions. The combination of liquid chromatography (LC) methods and ES-MS offers one of the foremost methods for determining compounds in complex aqueous solutions. In thisAuthor: Steven Kent Johnson. Method is for determination of mercury (Hg) in filtered and unfiltered water by cold-vapor atomic fluorescence spectrometry (CVAFS). It is applicable to drinking water, surface and ground waters, marine water, and industrial and municipal wastewater. The method is based on a. Benzylamine is a primary amine compound having benzyl as the N-substituent. It has been isolated from Moringa oleifera (horseradish tree). It has a role as an EC (nitrilase) inhhibitor and a plant metabolite. It is a primary amine and an aralkylamine. It is a conjugate base of a benzylaminium. Benzylamine is a colorless to light yellow.

  Quantitative measurements of the partial vapor pressure of formaldehyde are performed above aqueous H2CO solutions of different concentrations (from 10(-5) to molar fraction) using mass spectrometry and IR diode laser by: 7. CBRN Technician Study Guide Level 1 (18 August Handbook) CBRN ALC Learn with flashcards, games, and more — for free.   Determination of ammonia, ethanol and acetic acid in solution using membrane introduction mass spectrometry. Talanta 41(8) van Staden JF []. Simultaneous flow-injection analysis for two components with on-line dialysis and gas diffusion in series. Determination of chloride and ammonia nitrogen in industrial effluent water. a direct current (DC) gas discharge is generated between a liquid and a metal. Under this configuration, known as plasma electrolysis or glow- contact with an aqueous solution are conducted in an electrochemical H- of oxygen and water vapor in .

Aqueous solution sampling and the effects of water vapor in glow discharge mass spectrometry by Philip H. Ratliff Download PDF EPUB FB2

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 Aqueous solution sampling and the effects of water vapor in glow discharge mass spectrometry book 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.

The retained Hg(II) ions were eluted with 3molL−1 solution of HCl and mea-sured by cold vapor atomic absorption spectrometry (CV-AAS).

The effect of different variables such as pH, sample flow rate, amounts of 2-mercaptobenzimidazole loaded on agar and SnCl2 concentration was investigated and optimum conditions were Size: KB.

The values of RPq and RPa control the mass bandpass in the DRC. RPq is the low mass cutoff and controls the RF applied to the quadrupole rods in the DRC. RPa is analogous to a high mass cutoff and controls the dc voltage applied to the quadrupole rods Cited by: 4. 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.samples by inorganic solid mass spectrometry were determined down to sub-ngg−1 and for aqueous solution by ICP-MS down to sub-pgL −1.

The aim of this review is to discuss the various inorganic mass spectrometric techniques including new analytical develop.Calibration Standard (CAL) - A solution prepared from the dilution of stock standard solutions. The CAL solutions are used to calibrate the instrument response with respect to analyte concentration.

Field Reagent Blank (FRB) - An aliquot of reagent water or other blank matrix that is placed in a sample container in the laboratory and treated as a sample inFile Size: KB.