Preconcentration and Determination of Cobalt(II) in Natural Waters using Silica Gel Loaded with 2-Mercaptobenzothiazole

2-Mercaptobenzothiazole이 흡착된 Silica Gel을 이용한 자연수 중의 코발트(II)의 농축 및 정량

  • Choi, Jong-Moon (Department of Environmental Engineering, Donghae University) ;
  • Choi, Hee-Seon (Department of Chemistry, The University of Suwon)
  • Received : 2004.09.08
  • Accepted : 2004.10.04
  • Published : 2004.12.25


A method on the determination of Co(II) after adsorbing of Co(II) on 2-mercaptobenzothiazole-loaded silica gel was studied. The conditions on the separation of Co(II) such as pH of solution, the amount of 2-mercaptobenzothiazole, the flow rate for adsorption, and the desorption solvent were optimized to 9.0, 0.05 g, $10mL\;min^{-1}$ and 1 M $HNO_3$ in ethanol, respectively. Under these optimum conditions, the calibration curve of Co(II) was obtained over concentration range of $2{\sim}120ng\;mL^{-1}$. The detection limit was $0.6ng\;mL^{-1}$. Recovery yields of Co(II) in various natural water samples were more than 90%.


  1. B. Lilleengen and G. Wibetoe, Anal. Bioanal. Chem., 372, 187(2002).
  2. I. Narin and M. Soylak, Anal. Chim. Acta, 493, 205(2003).
  3. P. S. Roden, I. L. Alcantara, G. R. Castro, J. C. Rocha, C. C. F. Padilha and P. M. Padilha, Anal. Bioanal. Chem., 375, 574(2003).
  4. C. Park and K. Cha, Bull. Korean Chem. Soc., 19, 224(1998).
  5. D. A. Skoog, F. J. Holler and T. A. Nieman, 'Principles of Instrumental Analysis', 5th Ed., Saunders College Publishing, Philadelphia, U. S. A., 1998.
  6. H. Lee, Y. Muraoka, M. Oshima and S. Motomizu, Anal. Sci., 20, 183(2004).
  7. S. B. Adeloju and A. Hadjichari, Anal. Sci., 15, 95(1999).
  8. E. Matoso, L. T. Kubota and S. Cadore, Talanta, 60, 1105(2003).
  9. A. Goswami and A. K. Singh, Talanta, 58, 669(2002).
  10. H. B. Singh, N. K. Agnihotri and V. K. Singh, Talanta, 48, 623(1999).
  11. F. Monteil-Rivera and Dumonceau, J. Anal. Bioanal. Chem., 374, 1105(2002).
  12. Z. Bae, Y. Park, S. Lee, W. Jeon and H. Chang, Bull. Korean Chem. Soc., 17, 995(1996).
  13. F. J. Welcher 'Standard Methods of Chemical Analysis', 6th Ed., Vol. 2, Part A, 123, F. J. Welcher, Ed., Robert E. Krieger, New York, U.S.A., 1963.
  14. K. W. Jackson and T. M. Mahmood, Anal. Chem., 66, 252R(1994).
  15. V. A. Lemos, J. S. Santos, L. S. Nunes, M. B. Carvalho, P. X. Baliza and R. T. Yamaki, Anal. Chim. Acta, 494, 87(2003).
  16. H. Karami, M. F. Mousavi, Y. Yamini and M. Shamsipur, Anal. Chim. Acta, 509, 89(2004).
  17. J. L. Manzoori, M. H. Sorouradin and A. M. Haji Shabani, Microchem. J., 63, 295(1999).
  18. A. Uzawa, Y. Iwamoto and T. Okutani, Bunseki Kagaku, 45, 955(1996).