Electrothermal atomization laser-excited atomic fluorescence spectrometry for direct analysis of germanium in water and blood samples

Aucélio, Ricardo Q.; Rubin, V. N.; Becerra, Esperanza Galarza de; Smith, B.W.; Winefordner, J. D.

doi:10.1016/s0003-2670(97)00319-x

Cited by 14 publications

(3 citation statements)

References 31 publications

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“…However, no change in the frequency shift was found. This was expected because, as described in the literature, [17][18][19] the concentration of germanium in natural water is very small (ng L -1 ). Although the analysis of the water samples with low boron content can be done by injecting a large volume, sample preconcentration was preferred, because this procedure allows a higher throughput, since several samples can be prepared simultaneously using various ion exchange (Amberlite IRA-743) columns.…”

Section: Sample Analysismentioning

confidence: 52%

Determination of boron in natural water and products derived from grape using an automated flow injection analysis system with piezoelectric detection

Jesus

Saito

Lago

2004

J. Braz. Chem. Soc.

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Um sistema sensível e seletivo para boro, utilizando um sistema de análise por injeção em fluxo com detecção piezelétrica, é apresentado. O detector é um cristal piezelétrico de quartzo com eletrodo separado recoberto com filme de poliepicloridrina modificada com N-metil-D-glucamina. A capacidade do filme em reter boro possibilita ampliar a faixa de resposta linear e a sensibilidade, variando o volume de amostra injetada. Neste trabalho, o volume de amostra variou de 0,5 a 5,0 mL. Dentre diversos íons analisados, germanato foi o único interferente. Entretanto, essa interferência pode ser eliminada com a adição de sulfeto à amostra. O método se mostrou eficiente na determinação de boro em amostras de água natural (de 1,71 a 309 µg L-1) e produtos derivados da uva (de 2,06 a 6,21 mg L-1). Um pré-tratamento com peróxido de hidrogênio em meio básico foi necessário devido à grande quantidade de carboidratos presentes no suco de uva. An automated flow injection analysis system with piezoelectric detection is proposed as a sensitive and selective method for boron. The detector is an electrode-separated piezoelectric quartz crystal coated with N-methyl-D-glucamine-modified poly(epichlorohydrin). The film ability to retain boron allows the adjustment of the linear dynamic range and the sensitivity by varying the injected sample volume. In the present work, the sample volumes were varied from 0.5 to 5.0 mL. Among several ionic species, germanate is the only one that can interfere in the method. Nevertheless, it can be eliminated by addition of sulfide to the sample. The method was successfully applied to the determination of boron concentration in samples of natural water (from 1.71 to 309 µg L-1) and products derived from grape juice (from 2.06 to 6.21 mg L-1). A pretreatment with hydrogen peroxide in alkaline medium was required due to the great amount of sugars in the grape products.

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Section: Sample Analysismentioning

confidence: 52%

Determination of boron in natural water and products derived from grape using an automated flow injection analysis system with piezoelectric detection

Jesus

Saito

Lago

2004

J. Braz. Chem. Soc.

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“…A very sensitive LEAFS method for the with blood sampling at 3-7 h, was satisfactory for accurate direct determination of Ge in water and blood samples was determination of the glomerular filtration rate. developed by Aucelio et al,127 in which a graphite furnace Determination of 129I and I isotope ratios in teeth and bones and L'vov platform were used to improve the efficiency of by AMS was made by Cornett et al91 to assess their suitability sample atomization. A number of chemical modifiers were as a dosimetric record of exposure to high neutron fluxes and evaluated.…”

Section: Haraguchi Et Al130 Reported On An Interlaboratory Compari-mentioning

confidence: 99%

Clinical and biological materials, foods and beverages

Taylor¹,

Branch²,

Halls³

et al. 1999

J. Anal. At. Spectrom.

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“…Masera et al (384) investigated matrix effects in the determination of Au, Ir, Pd, Pt, and Rh in silver nitrate by ETA-LEAFS. This technique was also used for the determination of Sn in nickel-base alloys (385), Hg in silver (386), Pb in blood (387), Tl (388) and Pb (389) in lake water, Au in air particulates (390), P in polymers by direct analysis of solid samples (391), Co in soil, steel, and graphite (392), Ge in water and blood (393), Bi in snow and ice (394), and Ir, Rh, Pd, Pt, and Au in water (395). A combined laser ablation-LEAFS technique was described for the determination of Na in water (396).…”

Section: Laser Techniquesmentioning

confidence: 99%

Atomic Absorption, Atomic Emission, and Flame Emission Spectrometry

Jackson

1998

Anal. Chem.

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Electrothermal atomization laser-excited atomic fluorescence spectrometry for direct analysis of germanium in water and blood samples

Cited by 14 publications

References 31 publications

Determination of boron in natural water and products derived from grape using an automated flow injection analysis system with piezoelectric detection

Determination of boron in natural water and products derived from grape using an automated flow injection analysis system with piezoelectric detection

Clinical and biological materials, foods and beverages

Atomic Absorption, Atomic Emission, and Flame Emission Spectrometry

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