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

Abstract

A method on the determination of Co(II) after adsorbing of Co(II) on 2-mercaptoben- zothiazole-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, 10 mL min-1 and 1 M HNO3 in ethanol, respectively. Under these optimum conditions, the calibration curve of Co(II) was obtained over concentration range of 2∼120 ng mL-1. The detection limit was 0.6 ng mL-1. Recovery yields of Co(II) in various natural water samples were more than 90%.