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Showing 1 to 14 of 14 for “"Graphite furnace"”.
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Direct determination of cadmium and beryllium in coal and fly ash slurries using graphite furnace atomic absorption spectrometry
Graphite Furnace Atomic Absorption Spectrometry (GFAAS) was used for the determination of cadmium and beryllium in coal and fly ash slurries. Sample preparation involved grinding the sample to a fine powder and slurrying it in a suitable solvent. Stable slurries were maintained by magnetic stirring …
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Evaluation of Arsenic and Selenium Quantitation in Marcellus Shales and Flowback Saline Waters using Thiol Cotton Fibre-Graphite Furnace Atomic Absorption Spectroscopy and Diffusive Gradient in Thin Film Techniques
… of arsenic and selenium was carried out by graphite furnace atomic spectroscopy (GFAAS). Extraction of arsenic and selenium from Marcellus shale exposed to HSW and WRF6 for varying lengths of time is also reported.;In addition, the role of hydrofluoric acid in microwave-assisted digestion …
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Studies on the analytical chemistry of chromium in aqueous solutions
… the model solution can be directly determined by graphite furnace atomic absorption spectrometry since the technique has the same sensitivity for both oxidation states of chromium. Because of low concentrations of chromium in the aquatic environment, direct determination of the total chromium …
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Development and characterization of furnace atomization plasma excitation spectrometry
Furnace Atomization Plasma Excitation Spectrometry (FAPES) is a new emission spectrochemical method which employs a graphite furnace for analyte atomization and an atmospheric pressure plasma sustained inside the furnace for analyte excitation. The primary objective of this work was to characterize …
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Removal of Arsenic Using Iron Coated Limestone
… final solution concentrations were analyzed by Graphite Furnace Atomic Adsorption Spectroscopy (GFAAs) and the results showed that iron coated limestone removed arsenic below 10ppb with 5 grams of material. Variations in iron coverage impacted efficiency of arsenic removal.</p>
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The development of analytical methods to elucidate the chemical forms of Cu, Zn, Cd and Pb in soil contaminated by sewage sludge and other effluents.
… describes how this technique was interfaced to Graphite Furnace Atomic Absorption Spectrometry in order to detect the copper content of the various soil solution species. Chapter five extends the above technique to the studv of the long term partioning of copper in water extracts of sewage …
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Arsenic contamination study of drinking water in Nepal
… and brought back to the U.S. for analysis using Graphite Furnace Atomic Absorption Spectrometry. Combined results from these tests indicate that no arsenic contamination was found above the World Health Organization (WHO) maximum contaminant level of 10ppb in the Kathmandu Valley. However, 18% of …
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Comparison of Stated Iron Concentrations Between Name Brand and Generic Children's Multivitamins
… samples were diluted equally and analyzed with a graphite furnace atomic absorption spectrometer. Comparison of the correlation of relative variation (CRV) shows that within each specific brand, name brand vitamins had less variation and, thus, more precise iron concentrations than the generic …
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Development of rapid techniques based on selective dissolution for the determination of the precious metals in geological samples
… extracts and aqueous raffinates were analysed by graphite furnace atomic absorption spectrometry, for which a comprehensive assessment of matrix interference effects was undertaken. Direct analysis of the aqua regia acid leachates by inductively coupled plasma-mass spectrometry (ICP-MS) was also …
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A study of triorganotin biocides in antifouling coatings.
… a flow system and analysis of the effluent by graphite furnace atomic absorption spectrometry. All eight samples were shown to have release-rates significantly less than that required for an effective antifouling coating.Incorporation of triorganotin biocides into the polyurethane resulted in …
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The Effects of ALAD Genotype and Blood Lead Levels on Anthropometric Measures in a Cohort of Mexican Children
… absorption spectrophotometry, adapted with a graphite furnace detector. ALAD genotype was determined using polymerase chain reaction (PCR) and gel electrophoresis and grouped for analysis as ALAD1-1 and ALAD1- 2;2 -2. Our sample included 447 participants who had complete data for all three …
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An investigation of Arsenic in biological samples from unexposed volunteers in the UK
… coupled plasma mass spectrometry (ICP-MS) and graphite furnace atomic absorption spectrometry (GF-AAS). The relationship between ethnicity and arsenic metabolism was investigated for the first time for a population in the United Kingdom. This investigation has been carried out through …
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The Effect Of An Intermittent Manganese (ii) Exposure On The Striatal Dopamine System
… cyclic voltammetry, in vivo microdialysis, and graphite furnace atomic absorption spectroscopy. The results demonstrate a bi-phasic striatal DA response depending on the dose of Mn administered.</p> <p>More specifically, the low dose of Mn (II) demonstrated a significant increase in Mn levels in …