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

Abstract

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%.

Keywords

cobalt;2-mercaptobenzothiazole;silica gel;preconcentration

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