초록
2000년도에 COMNAP/SCAR에 의해 극지지역의 환경모니터링에 관한 표준기술지침서인 'Antarctic Environmental Monitoring Handbook'이 발간되었다. 이 지침서에 따라 남극세종기지주변지역의 토양시료중의 중금속을 분석하였다. 시료분해방법은 고압산분해 방법을 사용하였고, 분석방법으로는 동위원소희석 유도결합플라스마질량분석법을 사용하여 토양중의 Pb, Cu, Zn 성분을 분석하였다. 분석방법의 정확성을 확인하기 위해 표준시료인 NIST 2702를 분석한 결과 인증값의 99.5~100.8% 범위내에서 일치하였다. Chelex 100 이온교환수지를 사용하여 간섭이온을 제거하기 위해 매질을 분리하였다. 측정결과 인위적오염이 예상되는 기지주변지역의 중금속의 평균농도는 각각 Pb 332.9 mg/kg, Cu 95.6 mg/kg, Zn 115.3 mg/kg로 나타났으며, 기지에서 멀리 떨어진 지역의 평균농도는 각각 Pb 28.1 mg/kg, Cu 101.8 mg/kg, Zn 115.6 mg/kg로 나타났다. Pb 농도는 기지주변지역과 멀리 떨어진 지점에서 현저한 차이를 보였다.
Antarctic Environmental Monitoring Handbook' was published by COMNAP/SCAR in 2000. The standardized method described in this handbook is recommended for monitoring of antarctic environment. High pressure bomb technique in this guide was used to decompose soil samples. In compliance with this guide book, high pressure bomb technique was applied to decompose the antarctic soil sampled at the King Sejong Station. An Isotope Dilution-Inductively Coupled Plasma-Mass Spectrometry (ID-ICP-MS) was applied to determine mass concentrations of Pb, Cu and Zn in the soil. The accuracy in this method was verified by the analysis of certified reference materials (CRM) of NIST 2702 (marine sediment). The analytical results agreed with certified value within the range from 99.5~100.8%. Matrix separation was necessitated for the determination of Cu and Zn by Chelex 100 ion exchange resin. As a result, the average mass concentrations of Pb, Cu and Zn which are suspected to be caused by anthropogenic pollution were 332.9 mg/kg, 95.6 mg/kg and 115.3 mg/kg, respectively. Those for the metals sampled in the soils of the remote regions from the station were 28.1 mg/kg, 101.8 mg/kg and 115.6 mg/kg, respectively.
