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Preconcentration and Determination of Cobalt(II) in Natural Waters using Silica Gel Loaded with 2-Mercaptobenzothiazole
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2004, v.17 no.6, pp.532-535
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(2004). Preconcentration and Determination of Cobalt(II) in Natural Waters using Silica Gel Loaded with 2-Mercaptobenzothiazole. Analytical Science and Technology, 17(6), 532-535.
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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, <TEX>$10mL\;min^{-1}$</TEX> and 1 M <TEX>$HNO_3$</TEX> in ethanol, respectively. Under these optimum conditions, the calibration curve of Co(II) was obtained over concentration range of <TEX>$2{\sim}120ng\;mL^{-1}$</TEX>. The detection limit was <TEX>$0.6ng\;mL^{-1}$</TEX>. Recovery yields of Co(II) in various natural water samples were more than 90%.
- keywords
- cobalt, 2-mercaptobenzothiazole, silica gel, preconcentration
Reference
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(1963.) Standard Methods of Chemical Analysis,
2
(1998.) Principles of Instrumental Analysis, Saunders College Publishing
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