Continuous-flow system for the determination of cobalt in sea and river water: In-Line Preconcentration/Separation Coupled with Catalytic Determination |
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| Authors: | Takeshi Yamane Keiko Watanabe Horacio A Mottola |
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| Institution: | Department of Chemistry, Faculty of Education, Yamanashi University, Takeda-4, Kofu-shi 400 Japan;Department of Chemistry, Oklahoma State University, Stillwater, OK 74078-0447 U.S.A. |
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| Abstract: | Cobalt is preconcentrated on a column packed with silica-immobilized 8-quinolinol and separated in a second column packed with a strongly acidic cation-exchange resin. The catalytic action of cobalt ions on the hydrogen peroxide oxidation of protocatechuic acid is used in the determination. The limit of detection is 5 × 10?3 ng ml?1. The separation step prevents interference from species such as iron(III) and manganese(II). The recommended procedure is applied to the coastal sea water and surface river water. |
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