2007
DOI: 10.1016/j.talanta.2006.08.024
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Feasibility of using solid sampling graphite furnace atomic absorption spectrometry for speciation analysis of volatile and non-volatile compounds of nickel and vanadium in crude oil

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Cited by 38 publications
(27 citation statements)
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“…Care has to be taken, however, to avoid analyte losses in this stage, as even elements that are usually considered thermally stable, such as nickel or vanadium, might be volatilized at low temperatures, e.g., in the form of porphyrine complexes [5,11,12]. An attractive alternative for trace element determination in crude oil might be the direct analysis without any sample preparation, using a solid sampling (SS) technique, as has been proposed for the determination of Ni and V in crude oil [13]. This technique does not require any sample preparation, includes no risks of contamination, provides highest sensitivity as no dilution is involved, does not use chemicals and requires only a minimum of time [3,4,14,15].…”
Section: Introductionmentioning
confidence: 99%
“…Care has to be taken, however, to avoid analyte losses in this stage, as even elements that are usually considered thermally stable, such as nickel or vanadium, might be volatilized at low temperatures, e.g., in the form of porphyrine complexes [5,11,12]. An attractive alternative for trace element determination in crude oil might be the direct analysis without any sample preparation, using a solid sampling (SS) technique, as has been proposed for the determination of Ni and V in crude oil [13]. This technique does not require any sample preparation, includes no risks of contamination, provides highest sensitivity as no dilution is involved, does not use chemicals and requires only a minimum of time [3,4,14,15].…”
Section: Introductionmentioning
confidence: 99%
“…Aunque empleando otros espectrómetros, trabajos realizados en el análisis de muestras en suspensión muestran el efecto de la matriz sobre la pendiente analítica, observado mediante los valores de la masa característica, mo: para el Cr valores entre 3,5 rg y 11,2 rg en suspensiones de muestras geológicas a Tp y Tat variables (1.400-1.600 y 2.300-2.500 ºC, respectivamente), 31 y para el Ni, valores de 26 rg en el análisis en suspensiones de aleaciones de aluminio, 22 y de 27 rg y 44 rg en el análisis de suspensiones de muestras de fuel y material del fraccionamiento de crudos empleando Tat de 2.400 ºC. 32 En el caso del V, se observaron diferencias entre los valores del LODm y mo obtenidos con el método propuesto y los señalados por el fabricante del equipo para el análisis simultáneo del elemento en soluciones acuosas. 30 Aunque no se encontraron valores de estas figuras de mérito para el análisis unielemental y/o simultáneo en orina, a modo de comparación, pueden señalarse los límites de detección instrumental y masa característica, 0,34 μg L -1 y 78 μg, respectivamente, obtenidos empleando el mismo espectrómetro (PE-SIMAA 6000), a una Tp de 1.700 ºC y Tat de 2.600 ºC en el análisis de suspensiones de cabello humano, 33 así como otros valores de mo obtenidos empleando otros instrumentos: 20-21 rg en el análisis de emulsiones de diesel y productos del fraccionamiento de crudos a una Tat de 2.600 ºC; 32 72 rg en muestras de petróleo empleando una Tat de 2.700 ºC; 34 37-288 rg en muestras de suspensiones de muestras geológicas a una Tat de 2.600 ºC.…”
Section: Figuras De Mérito Del Método Mo Y Lodunclassified
“…Recent interest in nickel fractionation of fossil fuel ash, which is emitted in millions of tons each year from utility plants, is based on regulatory and risk assessment needs (Wang et al,1997;Silva et al, 2007;Aydin et al, 2010c). In order to judge the actual risk of nickel in the environment and to evaluate its biological availability or toxicity in the diet, the methods for fractionation analysis are necessary (Lundholm et al, 2007;Aydin et al, 2009).…”
Section: Introductionmentioning
confidence: 99%