Search results for "Optical emission spectrometry"

showing 10 items of 13 documents

Ultrasonic nebulization inductively coupled plasma optical emission spectrometry method for wine analysis

2020

Abstract A methodology was developed to determine mineral elements in wines using Inductively Coupled Plasma Optical Emission Spectrometry combined with ultrasonic nebulization. The concentration of 36 elements (Al, B, Ba, Bi, Ca, Cd, Ce, Co, Cr, Dy, Er, Eu, Fe, Gd, K, La, Lu, Mg, Mn, Mo, Na, Nd, Ni, Pb, Pr, Sb, Sc, Sm, Sr, Tb, Ti, Tm, V, Y, Yb, and Zn) was determined in 59 wine samples and used to distinguish between Brazilian and Spanish wines. The best conditions for the plasma were selected using a two-level factorial design: radiofrequency power 1500 W; plasma gas flow rate 15 L min−1; auxiliary 0.70 L min−1; and nebulizer 0.40 L min−1. An exploratory multivariate analysis by Principal…

010302 applied physicsWineRiver valleyChemistry010401 analytical chemistryAnalytical chemistryMineral composition01 natural sciencesAtomic and Molecular Physics and OpticsUltrasonic nebulization0104 chemical sciencesAnalytical ChemistryInductively coupled plasma atomic emission spectroscopy0103 physical sciencesInductively coupled plasmaOptical emission spectrometryInstrumentationSpectroscopySpectrochimica Acta Part B: Atomic Spectroscopy
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Mineral profiles of legumes and fruits through partial least squares energy dispersive X-ray fluorescence

2019

Abstarct Energy dispersive X-ray fluorescence (ED-XRF) has been employed for the determination of mineral elements in 15 varieties of legumes and 14 cherry samples. ED-XRF signals directly obtained from pulverized samples were modelized by partial least squares (PLS) using Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) of a selected number of samples, after microwave assisted acid digestion, as reference data. Models were built to predict the concentration of Al, Ca, Cu, Fe, K, Mg, P, Sr and Zn. Average concentrations predicted were 6, 930, 7, 40, 6400, 990, 2100, 4 and 15 μg g−1 for Al, Ca, Cu, Fe, K, Mg, P, Sr and Zn, respectively with relative errors from 7 till 26%. …

0303 health sciencesMaterials scienceMineral030309 nutrition & dietetics010401 analytical chemistryReference data (financial markets)Analytical chemistryX-ray fluorescence01 natural sciencesFluorescence0104 chemical sciences03 medical and health sciencesPartial least squares regressionInductively coupled plasmaOptical emission spectrometryEnergy (signal processing)Food ScienceJournal of Food Composition and Analysis
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Thermomineral waters of Greece: geochemical characterization

2020

75 °C). In terms of pH most results vary from 5.5 to 823 °C) ii) warm (23 40 °C) iii) thermal (40 75 °C) and iv) hyperthermal (&gtfew springs show either very low pH (&lt10) proposing serpentinization processes. Regarding TDS concentrations collected waters can be subdivided into low salinity (up to 1.5 g/L) brackish (up to 20 g/L) and saline (up to 43 g/L). The medium high salinities can be justified by mixing with sea water and/or strong waterrock interaction processes. Isotope composition of O and H ranges from 12.7 to +2.7 ‰ SMOW and from 91 to +12 ‰ SMOW respectively and is generally comprised between the Global Meteoric Water Line and the East Mediterranean Meteoric Water Line. Only few water samples show a positive shift for δ18O possibly related to high temperature waterrock interaction processes. Carbon dioxide (18 997000 μmol/mol) or N2 (1100 989000 μmol/mol) or CH4 (&ltMany geothermal areas of Greece are located in regions affected by Miocene or Quaternary volcanism and in continental basins characterised by elevated heat flow. Moreover the majority of them is found along the coast as well as in islands of the Aegean Sea and thus thermal water is often brackish to saline due to marine intrusion into costal aquifer. In the present study almost 300 thermal and cold mineral water samples were collected along the Hellenic territory with their physicochemical parameters (temperature pH electrical conductivity and Eh) and the amount of bicarbonates (titration with 0.1N HCl) being determined in situ. Additionally gases found either in free or dissolved phase were sampled. Both water and gas samples were analysed at the INGVPa laboratories for major ions (Ion Chromatography) silica (Inductively Coupled Plasma Optical Emission Spectrometry) chemical composition of free and dissolved gases (Gas Chromatography) water isotopes (O and H) and carbon and helium isotopes of free and dissolved gases (Mass Spectrometry). The temperature of the investigated waters ranges from 6.5 to 98°C pH from 1.96 to 11.98 whilst Total Dissolved Solids (TDS) from 0.06 to 43 g/L. Based on the temperature parameter waters can be divided into four groups: i) cold (&lt0.5 913000 μmol/mol) are the prevailing gas species found in the studied sites. The δ13CCO2 values ranged from 20.1 to +8.5 ‰ whilst the isotope ratio of He from 0.21 to 6.71 R/RA.4) suggesting interaction with H2Srich gases or very high pH values (&gtSettore GEO/08 - Geochimica E Vulcanologia
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Literature survey of the on-line preconcentration in flow-injection atomic spectrometric analysis

1992

The literature on the use of “on-line” preconcentration in flow injection atomic spectrometric analysis is reviewed, taking into account its application both in flame and electrothermal atomic absorption methods as well as in plasma emission spectrometry. The basis of the different preconcentration approaches, such as liquid-liquid extraction, column preconcentration and “on-line” precipitation are discussed. The literature survey reveals the analytical performance of the developed methodologies.

ChromatographylawLiquid–liquid extractionChemistryExtraction (chemistry)Analytical chemistryLiterature surveyAtomic absorption spectroscopyOptical emission spectrometryBiochemistrylaw.inventionLine (formation)Fresenius' Journal of Analytical Chemistry
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Chromium speciation in liquid matrices: a survey of the literature

2000

A thorough review of the literature published (1983 - March 1999) on chromium speciation in liquid samples is presented, and analytical techniques used in the 404 articles are summarized. The discussion focuses on atomic spectrometric techniques, which are mainly employed for chromium speciation in liquid matrices (134 articles). Details on the type of pretreatment, species, samples, techniques and analytical features of the methodologies proposed are given.

ChromiumChemistrylawGenetic algorithmAnalytical chemistrychemistry.chemical_elementOptical emission spectrometryAtomic absorption spectroscopyBiochemistrylaw.inventionFresenius' Journal of Analytical Chemistry
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Simultaneous determination of hydride and non-hydride forming elements by inductively coupled plasma optical emission spectrometry

2011

e percentagens de recuperacao entre 97 e 103%. A aplicabilidade do sistema foi demonstrada na determinacao simultânea de Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Zn, As, Bi, Sb, Se e Te em amostras certificadas para elementos tracos, NIST 1549 (leite em po desnatado), NIST 1570a (folhas de espinafre), DORM-2 (musculo de cacao) e TORT-2 (hepatopâncreas de lagosta). Os resultados obtidos foram concordantes com os teores certificados. The operating characteristics of a dual nebulization system were studied including instrumental and chemical conditions for the hydride generation and analytical figures of merit for both, hydride and non hydride forming elements. Analytical performance of the neb…

Detection limitHydrideChemistryInductively coupled plasma atomic emission spectroscopyRelative standard deviationAnalytical chemistryGeneral ChemistryInductively coupled plasmaOptical emission spectrometryJournal of the Brazilian Chemical Society
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(Table 1) Geochemistry of ODP Site 160-963 sediments

2010

The Mediterranean Sea acts as a miniature ocean with the development of its own conveyor belt. It constitutes an ideal location to study and forecast how the marine environment responds to rapid climatic change. Here we present a palaeoenvironmental study carried out on the sediments of ODP Site 963, recovered in the Sicily Channel, the sill which divides the western from the eastern Mediterranean basin. We focused on the transition between the penultimate glacial (MIS 6) and the last interglacial (MIS 5), between approximately 130 and 115 kyr BP. A novel approach is proposed, taking into account centennial-scale geochemical data on major elements, selected trace elements, and yttrium and R…

Leg160Inductively coupled plasma - mass spectrometry (ICP-MS)GadoliniumLutetiumOcean Drilling Program (ODP)HolmiumAGEEuropiumLanthanumManganese oxideIron oxide Fe2O3Iron oxideSilicon dioxideDysprosiumCalculatedYttriumInductively coupled plasma mass spectrometry ICP MSAluminium oxideYtterbiumTerbiumInductively coupled plasma optical emission spectrometryRatioMagnesium oxideNeodymiumYttrium Holmium ratioSamariumJoides ResolutionCalcium oxideCeriumICP OESCerium anomalyBariumYttrium/Holmium ratioThuliumEarth System ResearchOcean Drilling Program ODPTitanium dioxideFe2O3PraseodymiumICP-OES Inductively coupled plasma - optical emission spectrometryComposite CoreErbium
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Determination of Calcium in Certain Fertilizers by Inductively Coupled Plasma Atomic Emission Spectrometry: Studies of Some Spectral and Interelement…

1997

Abstract Four analytical wavelengths (393.366, 396.847, 317.933, and 422.673 nm) were used to determine Ca in 2 fertilizers by inductively coupled plasma atomic emission spectroscopy (ICP-AES). Matrix effects were studied by adding to real fertilizer solutions fertilizer elements that are known or believed to interfere with Ca determination. Matrix effects were calculated by multiple linear regression. Interference was caused by S, K, or B. At 422.673 nm, the interference of B and K is a spectral effect, and at 396.847 and 317.933 nm, the interference of S and K is an interelement effect. At 393.366 nm, no linear interference was found. The best wavelength for determining Ca in fertilizers …

PharmacologyAnalytical chemistrychemistry.chemical_elementCalciumAnalytical ChemistryWavelengthchemistryInterference (communication)Inductively coupled plasma atomic emission spectroscopyEnvironmental ChemistryInductively coupled plasmaOptical emission spectrometryAgronomy and Crop ScienceQuantitative analysis (chemistry)Food ScienceAtomic emission spectrometryJournal of AOAC INTERNATIONAL
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Iron Determination in Fertilizers by Inductively Coupled Plasma Atomic Emission Spectrometry: Study of Spectral and Interelement Effects at Different…

1996

Abstract Four analytical wavelengths of iron (238.204, 239.562, 259.940, and 240.488 nm) were tested for determination of Fe in fertilizers by inductively cou pled plasma atomic emission spectroscopy (ICP AES). Variations in measurements were caused by the changing interference pattern at different wave lengths evaluated by multiple linear regression. Thus, results obtained with different wavelengths are not comparable. Ca, P, and K were typical ele ments causing interference in almost all examined Fe wavelengths. Wavelength Fe II 238.204 nm is the best wavelength for determination of Fe in fertiliz ers by ICP-AES. Method accuracy is ± 8% at the ex amined Fe levels in fertilizers.

PharmacologyChemistryAnalytical chemistryInterference (wave propagation)Analytical ChemistryWavelengthInductively coupled plasma atomic emission spectroscopyEnvironmental ChemistryInductively coupled plasmaOptical emission spectrometryAgronomy and Crop ScienceChemical compositionFood ScienceAtomic emission spectrometryJournal of AOAC INTERNATIONAL
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Determination of Sulfur in Fertilizers by Inductively Coupled Plasma-Atomic Emission Spectrometry: Spectral and Interelement Effects at Various Wavel…

1996

Abstract Three analytical wavelengths (180.731,182.037, and 182.625 nm) were tested for determination of sulfur in 2 fertilizers by inductively coupled plasmaatomic emission spectrometry (ICP-AES). Variable S results at 182.037 nm were caused by a downward sloping background shift (Fe line at 181.851 nm) during measurement of the sample solutions. At 182.625 nm an emission peak doublet, 182.619/182.635 nm, was observed from which the instrument selected the measurement peak. A shift from calibrated peak 182.619 nm to noncalibrated peak 182.635 nm occurred when the S/B ratios were ≤22-31 in the fertilizer samples examined. For the 3 wavelengths of S investigated, the pattern of spectral and …

PharmacologyChemistryAnalytical chemistrychemistry.chemical_elementSulfurAnalytical ChemistryWavelengthInterference (communication)Environmental ChemistryInductively coupled plasmaOptical emission spectrometryAgronomy and Crop ScienceChemical compositionFood ScienceLine (formation)Atomic emission spectrometryJournal of AOAC INTERNATIONAL
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