Palavras-chave
flow-injection analysis
CVAAS
modified silica
preconcentration
Como Citar
Resumo
This paper discusses a rapid and sensitive method developed to determine trace levels ofmercury in natural water samples by cold vapor atomic absorption spectrometry using a preconcentration
system composed by mini-column packed with 100 mg of 2-aminothiazol modified silica gel (SiAT)
coupled on-line with the spectrometer’s cold vapor generator system. The optimum preconcentration
conditions are also described here. The preconcentrated Hg(II) ions were eluted directly from the column
to the spectrometer’s cold vapor generator system using 100 μL of 2 mol L -1 hydrochloric acid and the
retention efficiency achieved exceeded 95%. The enrichment factors determined were 29, 38 and 46
using 3, 4 and 5 mL of preconcentrated aqueous solutions containing 400 ng L -1 of Hg. The detection
limit calculated was 5 ng L -1 . The preconcentration procedure was applied to determine trace level
mercury in spiked river water samples.
Referências
E. D., Bidone; Z. C., Castilhos, T. M., Cid., De Zouza, L.
D., Lacerda, Bulletin Environmental Contamination and
Toxicology 59 (1997) 201.
E. D., Bidone; Z. C., Castilhos, T. M., Cid., De Zouza, L.
D., A screening approach Water, Air and Soil Pollution, 97
(1997) 15.
V., Hatje, E. D., Bidone, J. L., Maddok, Environmental
Technology 17 (1998) 487.
F. S., Rodrigues, J. E. L., Maddok, Journal Geochem.
Explor. Amsterdam 58 (1997) 240.
D., Amouroux, J. C., Wasserman, E., Tessier, O., Donard,
Environmental Science & Technology 33 (1999) 3051.
C. M., Tseng, A., Diego, J. C., Wasserman, Chemosphere
(1999) 1136.
J. E. Scott, J. M. Ottaway, Analyst 106 (1981) 1081.
R., Dumarey, E., Temmerman, R., Dams, J., Hoste, Anal.
Chim. Acta 170 (1985) 340.
E. Temmerman, C. Vandecasteele, G. Vermeir, R. Leyman,
R. Dams, Anal. Chim. Acta 236 (1990) 376.
L. Liang, N. S. Bloom, J. Anal. At. Spectrom. 8 (1993)
M. C. R., Resende, R. C., Campos, A., J., Curtius, J.
Anal. At. Spectrom. 8 (1993) 251.
L. M. Aleixo, M. F. B. Sousa, O. E. S. Godinho, G.,
Oliveira Neto, Y., Gushikem, J. C., Moreira, Anal. Chim.
Acta 271 (1993) 217.
J. C., Andrade, J. C., M. M. S., Bueno, Spectrochimica
Acta, Part B 49B (1994) 795.
M. C., Canela, W. F., Jardim, J. J. R., Rohwedder, J.
Autom. Chem. 18 (1996) 198.
H. Sakamoto, J. Taniyama, N. Yonehara, Anal. Sci. 13
(1997) 775.
C. E. C, Magalhães, F. J., Krug, A. H., Forstier, H.
Berndt, J. Anal. At. Spectrom. 12 (1997) 1234.
N. Miekeley, M. O. Amato, Atomic Spectroscopy 18(6)
(1997) 191.
J. A. Gomes Neto, L. F. Zara, A. Santos, J. C. Rocha, A.
A. Cardoso, Laboratory Robotics and Automation, 11
(1999) 310.
J. A. Gomes Neto, L. F. Zara, J. C. Rocha, A. Santos, C.
S. Dakuzaku, J. A. Nóbrega, Talanta 51 (2000) 594.
O. Wurl, O. Elsholz, R. Ebinghaus, Anal. Chim. Acta
(2001) 249.
J. C., Moreira, Y., Gushikem, Anal. Chim. Acta (1985)
L. T. Kubota, J. c., Moreira, Y. Gushikem, Analyst 114
(1989) 1388.
N. L. Dias Filho, Y., Gushikem, W. L., Polito, J. C. ,
Moreira, E. O., Ehrim, Talanta 42 (1995) 1630.
P. Lessi, N. L. Dias Filho, J. C. Moreira, J. T. S. Campos,
Anal. Chim. Acta 327 (1996) 190.
P. M. Padilha, L. A. M. Gomes, C. C. F. Padilha, J. C.
Moreira, N. L. Dias Filho, Anal. Lett. 32 (1999) 1820.
A. M. Gomes, P. M. Padilha, J. C. Moreira, N. L. Dias
Filho, Y. Gushikem, J. Bras. Chem. Soc. 9 (1998) 499.
A. G. S. Prado, C. Airoldi, Anal. Chim. Acta 432
(2000) 211.
I. L Alcântara, P. S. Roldan, G. R. Castro, F. V. Moraes,
F. A. Silva, C. C. F. Padilha, J. D. Oliveira, P. M. Padilha,
Anal. Sci. 20 (2004) 1029-1032.
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
Copyright (c) 2018 Eclética Química