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16 Newest Publications about the topic atomic absorption spectrometers

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Separation and Characterization of Vanadyl Porphyrins in Venezuela Orinoco Heavy Crude Oil

07-Jun-2013 | Xu Zhao; Yu Liu; Chunming Xu; Yuanyuan Yan; Yahe Zhang; Qingyu Zhang; Suoqi Zhao; Keng Chung; Murray R. Gray; Quan Shi, Energy & Fuels, 2013

Venezuela Orinoco heavy crude oil was sequentially separated into several subfractions to determine the contents and types of vanadyl porphyrins contained in the products. Vanadium contents in each subfraction were detected using an atomic absorption spectrometer (AAS) combined with the ...

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The tandem analytical method of flow injection diode array spectrophotometry and flame atomic absorption spectrometry (FI-DAD(vis)-FAAS) in iron speciation studies using 1,10-phenanthroline complexes

25-Mar-2013 | Microchemical Journal, 2013

September 2013 Publication year: 2013Source:Microchemical Journal, Volume 110 The article presents the new analytical method of determination of the content of selected iron forms in soil and sediment extracts. The presented tandem analytical system uses the molecular and atomic ...

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In situ identification and quantification in a flow cell with AAS downstream analytics

13-Oct-2012 | Michael Voith, Gerald Luckeneder, Achim Walter Hassel, Journal of Solid State Electrochemistry, 2012

To broaden the application range of materials and the challenge of corrosion protection leads to the development of novel metal coatings. Therefore, an investigation of the reactions between the coating and different process media under laboratory conditions is necessary. In the current work, a ...

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Preparation, morphology, and antibacterial properties of polyacrylonitrile/montmorillonite/silver nanocomposites

20-Aug-2012 | Jiunn-Jer Hwang, Te-Wei Ma, Materials Chemistry and Physics, 2012

Modified montmorillonite was intercalated with polyacrylonitrile (PAN) and then reacted with AgNO3. Plate-like clay, with anionic charges and a large surface area, was the dispersant of the silver ions. Aqueous 3% NaBH4-reduced Ag+ (in situ) was utilized to prepare a series of ...

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Determination of Nickel in Food Samples by Flame Atomic Absorption Spectroscopy after Preconcentration and Microextraction Based Ionic Liquids Using Full Factorial and Central Composite Design

31-Jul-2012 | Zohre Zarei, Farzaneh Shemirani, Journal of Food Science, 2012

Abstract:  In this research, a microextraction technique based on ionic liquids (ILs) termed in situ solvent formation microextraction (ISFME) was used for determination of nickel in solutions. 1‐(2‐pyridylazo)‐2‐naphtol (PAN) was chosen as a complexing agent. After preconcentration, the settled ...

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Electrothermal atomic absorption spectrometry with two-step probe atomization and primary absorption signal feedback

24-Jun-2012 | Yu. A. Zakharov, O. B. Kokorina, Journal of Analytical Chemistry, 2012

A method is proposed to reduce the relative detection limits for elements in an atomic absorption spectrometer with a graphite furnace and two-step probe atomization, based on using feedback between the absorption impulse of primary sample atomization and probe fixation in the position for vapor ...

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On-line electrochemical pre-concentration of arsenic on a gold coated porous carbon electrode for graphite furnace atomic absorption spectrometry

05-May-2012 | Frantisek Cacho; Lukas Lauko; Alena Manova; Ernest Beinrohr, Journal of Analytical Atomic Spectrometry, 2012

Trace arsenic was pre-concentrated from water samples in a two-electrode electrochemical flow cell coupled on-line to a graphite furnace atomic absorption spectrometer. The cell comprised a microporous electrode made of gold plated porous carbon material with a void volume of about 20 μL. The ...

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Combination of In Situ Surfactant-based Solid Phase Extraction and Central Composite Design for Preconcentration and Determination of Manganese in Food and Water Samples

25-Feb-2012 | Parisa Yasini, Farzaneh Shemirani, Rouhollah Khani, Food Analytical Methods, 2012

A new kind of solid phase extraction (SPE), which we named in situ surfactant-based solid phase extraction (ISS-SPE), represents a simple, selective and rapid method for preconcentration and determination of manganese from food and water samples. This method has distinct advantages: extraction ...

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Controlled synthesis of polycrystalline nickel oxalate nanofibers by the mild thermal precipitation and aging process

19-Dec-2011 | Tao Li, Ying Liu, Tongjiang Peng, Guohua Ma, Xiaojiao Yang, Journal of Wuhan University of Technology--Materials Science Edition, 2011

Via a mild thermal precipitation and aging process, polycrystalline hydrated nickel oxalate nanofibers were synthesized using nickel chloride and ammonium oxalate as raw materials, with pH 8.0 and temperature 60 °C. Atomic absorption spectrometer (AAS), organic elemental analyzer (OEA), fourier ...

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In Situ Evaluation of Inorganic Matrix Effects on the Partitioning of Three Trace Elements (As, Sb, Se) at the Outset of Coal Combustion

08-Sep-2011 | Anna A. Raeva; Oleg V. Klykov; Evguenii I. Kozliak; David T. Pierce; Wayne S. Seames, Energy & Fuels, 2011

A direct method of assessing the partitioning of semivolatile trace elements (TEs), such as As, Sb, and Se, between the gas and solid phases in the microenvironment of the burning char can be used to gain insight into TE partitioning in coal-fired furnaces. Such a method was developed using a ...

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