DETERMINATION OF METALS IN BREWING MATERIALS BY FLAMELESS ATOMIC ABSORPTION SPECTROSCOPY
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The use of a flameless atomic absorption technique is described for the estimation of metals in malt, hops, wort and beer. The method was found to be satisfactory for the direct determination of Mn, Mg, Ca, Fe, Zn, Cu and Al. Ni, Co and Pb were determined by the addition of internal standards. A balance sheet for ten metals through the brewing process is presented.Keywords:
Atomic spectroscopy
In this Part 3 survey article of atomic spectroscopy instrument components, we look at instrument components and subassemblies used for the special components and terms used in atomic spectroscopy instrumentation for inductively coupled plasma–mass spectrometry (ICP-MS), ICP–optical emission spectrometry (ICP-OES), X-ray fluorescence (XRF), energy-dispersive X-ray spectroscopy (EDX), total reflection X-ray fluorescence (TXRF), and laser-induced breakdown spectroscopy (LIBS). Our “under the hood” look continues as we survey the most typical atomic spectroscopy design components. As we continue publishing our four-part component survey series, we note that tutorial articles, and The Spectroscopy Instrument Components Terminology Guide, posted digitally in February 2022, are available to our readers.
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Atomic absorption spectroscopy (AAS) is used for detection and estimation of metals in solutions. It was only in 1955 that the use of AAS for detection and estimation of metallic elements was reported by Dr. A. Walsh of Australia. This discovery became a revolutionary development in the analysis of trace metals. This technique has been successfully used for the determation of as many as sixty five elements.
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J. R. S. Broughton and C. W. Fuller, Proc. Anal. Div. Chem. Soc., 1977, 14, 112 DOI: 10.1039/AD9771400112
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The concentrations of some heavy metals, (Fe, Zn, Cu, Pb ,Cd and Co) in Cowsmeat, and some chicken organs collected from five regions of Damietta governorate (ElZarka, Faraskour, Kafr El-Batiekh, Damietta City and New Damietta city) in Egyptcountry were assessed using Flame Atomic Absorption Spectrophotometry (A.A.S). Alsothe study aimed to evaluate the effect of heat on the heavy metals concentrations. Theobtained results declared that the concentrations of heavy metals in cows meat samplesfrom different regions showed a variation followed the order Zn> Fe> Cu> Pb> Cd> Co.The same observation was found in concentrations of heavy metals in chicken gizzardsamples, Zn> Fe> Cu> Pb> Cd> Co. While, in the chicken livers the concentrations ofheavy metals followed the sequence of Fe > Zn> Cu > Pb> Cd > Co. According tomaximum allowable levels the concentrations of Zn, Cu and Cd in chicken gizzard andlivers below the allowable levels, while the concentrations of Fe and Pb above the safelimits. Also according to allowable levels of
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This paper is the ninth biennial review on the atomic absorption spectrometry (AAS) and atomic fluorescence spectrometry (AFS) in the Chinese Journal of Analysis Laboratory. It goes through the main advances in the analytical technique of the AAS/AFS based on the publications from December 2000 to November 2002. The review deals with the general advance, equipment, flame atomic absorption spectrometry, electrothermal atomic absorption spectrometry, chemical evaporating generation and atomic fluorescence. 358 publications were referred
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Abstract Honey is a natural, sugary and sticky liquid that is produced from the nectars of flowers. This study aimed to analyze the concentration of some selected heavy Metals ( Zn, Cu, Mn, Cd, Pb, and Cr ) in honey samples. 1g of honey sample was digested by a hot plate using 9ml of HNO 3 and 3ml of H 2 O 2. The concentrations of the heavy metals in the digested were detected using a flame atomic absorption spectrometer. The results of this study found that the concentrations of the heavy metals in the honey samples were ranged from 1.97 to 2.04 µg/g for Zn, 1.93µg/g to 2µg/g for Cu, 0.83 to 1.01 µg/g for Mn, 0.25 to 0.45 µg/g for Cr, (0.025–0.031 µg/g for Cd. However, Pb was not detected in all honey samples. Hence, the levels of heavy metals found were below the permitted levels set by the World Health Organization.The contamination levels of the heavy metals are also found to be below the detection levels. The results of this study helped us to know that the acceptable amounts of heavy metals present in the honey samples. From the results, the levels of heavy metals found were below the permitted levels set by the World Health Organization. Thus, the heavy metals in the sampled honey are safe for human consumption in these selected areas.
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This chapter contains sections titled: Introduction Flame Atomic Absorption Spectrometry Sample Dilution Electrothermal Atomic Absorption Spectrometry Atomic Fluorescence Spectrometry Conclusions and Further Developments
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The use of a flameless atomic absorption technique is described for the estimation of metals in malt, hops, wort and beer. The method was found to be satisfactory for the direct determination of Mn, Mg, Ca, Fe, Zn, Cu and Al. Ni, Co and Pb were determined by the addition of internal standards. A balance sheet for ten metals through the brewing process is presented.
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Atomic Spectroscopy: The Main Components of Atomic Absorption Spectrometers, Elements Which Can be Analysed by Atomic Spectroscopy The Theory of Atomic Spectroscopy: The Relationship Between Light Absorption and Concentration, The Light Source, The Monochromator Atomic Absorption - From Sample to Flame: Sample Preparation, The Nebuliser Flameless Atom Cells: The Limitations of Flame Atomisation, Electrothermal Atomisation, Problems in Electrothermal Atomisation, Hydride Methods, Cold Vapour Determination of Mercury Background Correction in Atomic Absorption Spectroscopy: Causes of Background Interference, Principles of Background Correction Techniques Atomic Emission Spectroscopy: Revision of the Principles of Atomic Emission Spectroscopy, Flame Emission Spectroscopy, The Microwave Induced Plasma Perspectives - Present and Future.
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