Espectrometria de absorção atômica multielementar simultânea com atomização eletrotérmica em forno de grafite - uma revisão da técnica e aplicações

Freschi, Gian Paulo Giovanni; Dakuzaku, Carolina Sinabucro; Neto, José Anchieta Gomes; Moraes, Mercedes de

doi:10.1590/s0100-46702000000100017

Cited by 6 publications

(5 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Besides the heating program, the modifiers, the flow rate and composition of purge gas and the restricted linear response interval of GFAAS are among other parameters that may taken into consideration in the simultaneous detection [2]. Nevertheless, several works have been published on literature on simultaneous determination of different analytes in wide-ranging samples [16,17].…”

Section: Resultsmentioning

confidence: 99%

Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS

Filho

Polito

Oliveira³

et al. 2006

Eclet. Quím.

View full text Add to dashboard Cite

A method has been developed for the simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation by GFAAS. The integrated platform of transversely heated graphite atomizer was treated with tungsten to form a coating of tungsten carbide. Six samples of commercial solid antibiotics were analyzed by injecting 20 µL of digested samples into the pretreated graphite platform with co-injection of 5 µL of 1000 mg L-1 Pd as chemical modifier. Samples were mineralized in a closed-vessel microwave-assisted acid-digestion system using nitric acid plus hydrogen peroxide. The pyrolysis and atomization temperatures of the heating program of the atomizer were selected as 600°C and 2200°C, respectively. The calculated characteristic mass for Cd and Pb was 1.6 pg and 42 pg, respectively. Limits of detection (LOD) based on integrated absorbance were 0.02 µg L-1 Cd and 0.7 µg L-1 Pb and the relative standard deviations (n = 10) for Cd and Pb were 5.7% and 8.0%, respectively. The recoveries of Cd and Pb added to the digested samples varied from 91% to 125% (Cd) and 80% to 112% (Pb).

show abstract

Section: Resultsmentioning

confidence: 99%

Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS

Filho

Polito

Oliveira³

et al. 2006

Eclet. Quím.

View full text Add to dashboard Cite

show abstract

“…The main parameters of interest for multi-element AAS, namely light sources, atomizer type, temperature programming and modifier choice were discussed. 175 1.6.2 ETV-ICP-AES. One of the benefits of ETV sample introduction for ICP-AES is the possibility of in-situ sample preparation by selective vaporization of different sample components, using appropriate heating programs.…”

Section: Electrothermal Vaporisationmentioning

confidence: 99%

Advances in atomic emission, absorption and fluorescence spectrometry and related techniques

Evans

Dawson²,

Fisher

et al. 2002

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

show abstract

“…[28][29][30][31] It has provided good analytical results with relatively inexpensiveness and robustness. Additionally, the availability of simultaneous atomic absorption spectrometry with conventional light source (SIMAAS) 32,33 or with high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GFAAS) 34,35 allowed the development of multi-element methods, improving the analytical frequency, reducing the cost related to instrument maintenance, sample and high purity reagents.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous determination of chromium and manganese in alumina by slurry sampling graphite furnace atomic absorption spectrometry using NbC and NaF as modifiers

Souza

Oliveira

2010

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

This paper reports a method for the direct and simultaneous determination of Cr and Mn in alumina by slurry sampling graphite furnace atomic absorption spectrometry (SiS-SIMAAS) using niobium carbide (NbC) as a graphite platform modifier and sodium fluoride (NaF) as a matrix modifier. 350 mg of Nb were thermally deposited on the platform surface allowing the formation of NbC (mp 3500 C) to minimize the reaction between aluminium and carbon of the pyrolytic platform, improving the graphite tube lifetime up to 150 heating cycles. A solution of 0.2 mol L À1 NaF was used as matrix modifier for alumina dissolution as cryolite-based melt, allowing volatilization during pyrolysis step. Masses (c.a. 50 mg) of sample were suspended in 30 ml of 2.0% (v/v) of HNO 3 . Slurry was manually homogenized before sampling. Aliquots of 20 ml of analytical solutions and slurry samples were co-injected into the graphite tube with 20 ml of the matrix modifier. In the best conditions of the heating program, pyrolysis and atomization temperatures were 1300 C and 2400 C, respectively. A step of 1000 C was optimized allowing the alumina dissolution to form cryolite. The accuracy of the proposed method has been evaluated by the analysis of standard reference materials. The found concentrations presented no statistical differences compared to the certified values at 95% of the confidence level. Limits of detection were 66 ng g À1 for Cr and 102 ng g À1 for Mn and the characteristic masses were 10 and 13 pg for Cr and Mn, respectively.

show abstract

Espectrometria de absorção atômica multielementar simultânea com atomização eletrotérmica em forno de grafite - uma revisão da técnica e aplicações

Cited by 6 publications

References 39 publications

Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS

Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS

Advances in atomic emission, absorption and fluorescence spectrometry and related techniques

Simultaneous determination of chromium and manganese in alumina by slurry sampling graphite furnace atomic absorption spectrometry using NbC and NaF as modifiers

Contact Info

Product

Resources

About