Nafion-EDTA가 수식된 유리탄소전극을 이용한 수은(II)의 측정

• 영문명: Determination of Mercury(II) Using Nafion-EDTA-Modified Glassy Carbon Electrodes
• 발행기관: 한국환경보건학회
• 저자명: 정근호 박찬주 박율희 이지영
• 간행물 정보: 『한국환경보건학회지』제26권 제4호, 110~114쪽, 전체 5쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2000.12.30

영문 초록

Determination of mercury(II) using Nafion-EDTA-modified glassy carbon electrodes is proposed. it is based on the chemical reactivity of an immobilized modifier, Nafion-EDTA. Differential pulse voltammetry is employed, and the oxidation of complexes, at +0.43V vs. Ag/AgCl, is observed. For a 5-min preconcentration period, a linear calibration curve is obtained for mercury(II) concentrations ranging from 1.0×10-8 to 1.0×10-6 M. Further, when an approximate amount of copper(II) is added to the test solution, We demonstrate that at a preconcentration time of 5 min the Nafion-EDTA-modified glassy carbon electrode has a dynamic range of 2 orders of magnitude(from 10-10 to 10-8 M) and the detection limit is as low as 0.5×10-10 M(0.01 ppb). This method is applied to the determination of mercury(II) in sea water(4.0×10-10 M, 0.08ppb). The result agrees satisfactorily with the value(below 0.1 ppb) measured by using ICP/MS.