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Tuesday, August 11, 2020 | History

2 edition of Molecular emission cavity analysis (MECA) spectral studies and automation. found in the catalog.

Molecular emission cavity analysis (MECA) spectral studies and automation.

I. H. El-Hag

Molecular emission cavity analysis (MECA) spectral studies and automation.

by I. H. El-Hag

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  • 18 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D.) - University of Birmingham, Dept of Chemistry.

ID Numbers
Open LibraryOL13796461M

Indirect determination of cyanide by molecular emission cavity analysis. Analytica Chimica Acta , , DOI: /S(00) I. Jano, I.H. El-Hag, Alan Townshend. Study of the excited states of HNO and its emission spectrum in hydrogen-based flames. Analytica Chimica Acta , , DOI: /S(00 Cited by: Europe PMC is an ELIXIR Core Data Resource Learn more >. Europe PMC is a service of the Europe PMC Funders' Group, in partnership with the European Bioinformatics Institute; and in cooperation with the National Center for Biotechnology Information at the U.S. National Library of Medicine (NCBI/NLM).It includes content provided to the PMC International archive by participating publishers.

Light emission form a single molecular emitter change when the molecule is located close to a plasmonic cavity. Now the spectral features of this light emission can be monitored and controlled with Ångstrom precision in a STM cavity.. When light is confined into ‘hot-spots’ of nanometer size, it interacts very efficiently with single molecules, which allows to measure the molecular. An optical emission detector is presented realized on a glass chip. The device employs a direct current helium plasma for molecular fragmentation and excitation. The plasma was generated in a chamber of 50 nL volume at a typical operating pressure of Torr. The plasma stability and the current/voltage/pressure behavior were by:

A new flame-containing cavity for molecular emission cavity analysis (MECA) was designed. The reliability of the proposed design was evaluated using SO2 as a . A new flame-containing molecular emission cavity analysis (MECA) system was designed for the speciation of S2−, SO32−, SO42−, SCN−, and S2O32− in wastewater based on the catalytic.


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Molecular emission cavity analysis (MECA) spectral studies and automation by I. H. El-Hag Download PDF EPUB FB2

Molecular emission cavity analysis shows remarkable sensitivity, especially for sulphur, phosphorus and the halides. It is also capable of detecting most non-metals and metalloids. It can accommodate solid, liquid, and gaseous samples.

Flame Chemiluminescence Analysis by Molecular Emission Cavity Detection describes the development of molecular emission cavity analysis, its chemical basis, the Cited by: 5. Covering solid, liquid and gaseous samples, this volume surveys molecular emission cavity analysis, describing basic principles, instrumentation and automation, and the elements that can be It includes discussion of non-metal determination and speciation.

Flame Chemiluminescence Analysis by Molecular Emission Cavity Detection (Chemical Analysis) by Stiles, David A. and a great selection of related books, art. Molecular emission cavity analysis (MECA) is a flame photometric technique which relies on a cool flame source to generate relatively broadbanded molecular emissions, such as S2 and BO2 and.

Cadmium salts give an intense cadmium atomic emission in the MECA cavity in a hydrogen-nitrogen-air flame. When a carbon or stainless steel cavity is used, 10– ng of cadmium in 5-μl samples can be determined.

In the presence of sulphuric acid, anionic interferences are removed. Continuous flow molecular emission cavity analysis of cephalosporins by alkaline degradation to sulphide. Nikos Grekas and Antony C. Calokerinos Abstract. A continuous flow method for the determination of some cephalosporins (cephradine, cephalexin, cephalosporin C.

Determination of arsenic and antimony by MECA In molecular emission cavity analysis, the sample is placed within a small cavity at the end of a rod, which is then positioned in a hydrogen-nitrogen flame, SHORT COMMUNICATION so that the flame-gases flow almost vertically past the entrance of the by: A new flame-containing molecular emission cavity analysis (MECA) system was designed for the speciation of S 2−, SO 3 2−, SO 4 2−, SCN −, and S 2 O 3 2− in wastewater based on the catalytic properties of H +.For speciation of sulfur, SO 3 2− and S 2 O 3 2− were detected via the formation of SO 2 during direct introduction to an air-bubbling Cu(II)/HNO 3 and Al(III)/OH Cited by: 1.

Determination of ammoniacal nitrogen in fertilisers by molecular emission cavity analysis Determination of ammoniacal nitrogen in fertilisers by molecular emission cavity analysis R. Belcher, S. Bogdanski, A. Calokerinos and A. Townshend, Analyst,   Molecular cavity analysis-filter cavity In an emission promoting structure for use in an analyzer in conjunction with a flame and an optical emission analysis device, said structure defining a sheltered region for containing reactant, an exposure path for flame gas to interact with the reactant in the sheltered region and an optical path.

Molecular emission cavity analysis (MECA) is a chemiluminescence technique in which molecular emissions are generated within a cavity that is introduced into a hydrogen diffusion flame. The hydrogen flame acts as the environment of radicals, atoms and molecules which promote the chemical reactions producing excited species and the cavity acts as the environment for stabilizing the emitting by: 2.

Molecular Emission Spectroscopy 12 Flame Photometrie Detector 13 Molecular Emission Cavity Analysis 13 Basic Principles 14 The Importance of the Salet Phenomenon in MECA 25 Sample Introduction into the Cavity 28 Molecular Emissions and Spectra 35 Conclusions 38 References 39Cited by: 5.

Molecular emission cavity analysis is applied to the determination of nitrite and nitrate after their reduction to nitrogen monoxide by iodide or zinc.

The white emission stimulated from nitrogen monoxide in an oxy-cavity placed in a hydrogen—nitrogen diffusion flame is measured at by: The molecular emission cavity analysis (MECA) technique has been fully automated and the new instrument was used for the determination of phosphorus anions in inorganic samples after a rapid batch ion-exchange process.

The system consists of an automatic sample dispenser and a microprocessor-controlled timer, which. Two highly selective methods are described for the determination of boron by molecular emission cavity analysis.

In one, boron (> p.p.m.) is extracted as its 2-ethylhexane-1,3-diol chelate into methyl isobutylketone; ng of boron in 5 μl of the extract is determined by injection into the MECA cavity.

A continuous flow method for the determination of thiamine hydrochloride (– µg ml, × 10– × 10) is described. The sample was mixed with an excess of sodium hydroxide and remained in the delay coil for 20 min at 90 °C. The solution was then mixed with an excess of orthophosphoric acid and the hydrogenCited by: 7.

Ammonium nitrogen is determined at parts per million to percentage levels by injecting the sample solution on to solid sodium hydroxide in a small vial. The ammonia generated is swept by nitrogen into a molecular emission cavity analysis (MECA) oxy-cavity and the intensity of the NO—O continuum is measured at n.

Molecular emission cavity analysis shows remarkable sensitivity, especially for sulphur phosphorous and the halides. It is also capable of detecting most non-metals and metalloids, and can accommodate solid, liquid, and gaseous samples.

The Determination of Ammoniacal Nitrogen in Ferti­lizers by Molecular Emission Cavity Analysis. Calokerinos. Molecular Emission Cavity Analysis: principles and applications. Trends in Analytical Chemistry,16, Chapter «Chemiluminescence in Flow Injection Analysis» in the book «Chemiluminescence in Analytical.

Molecular Emission Cavity Analysis. Science 22 Mar Vol.Issuepp. DOI: /sciencea. Article; Info & Metrics; eLetters; PDF; This is a PDF-only article. The first page of the PDF of this article appears above. Science. VolIssue. DeepDyve is the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.Molecular emission cavity analysis.

Analytica Chimica Acta, DOI: /S(01) Marcela Burguera, Stanley L. Bogdanski, Alan Townshend, David J. Knowles. Molecular Emission Cavity Analysis. C R C Critical Reviews in Analytical Chemistry10 (2), DOI: /Cited by:   In contrast, the emission of light from clouds of cavitating bubbles at higher acoustic pressures (multi-bubble sonoluminescence 1) is dominated by atomic and molecular excited-state emission Cited by: