- Development of Appropriate Acid Digestion Method used for the Determination of Total Uranium in Soil by Inductively Coupled Plasma-Mass Spectrometer (ICP-MS)
- Shin, Gunhwan;Lee, Goontaek;Kang, Jiyoung;Yoon, Jungki;Kim, Hyunkoo;Noh, Hoejung;Kim, Jiin;Kim, Kyehoon;
- NICEM, Seoul National University;NICEM, Seoul National University;NICEM, Seoul National University;National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;National Institute of Environmental Research;Department of Environmental Horticulture, University of Seoul;
- 유도결합플라즈마-질량분석기(ICP-MS)를 이용한 토양의 총 우라늄 정량에 요구되는 적정 산분해 전처리 방법 개발
- 신건환;이군택;강지영;윤정기;김현구;노회정;김지인;김계훈;
- 서울대학교 농업생명과학대학 농생명과학공동기기원;서울대학교 농업생명과학대학 농생명과학공동기기원;서울대학교 농업생명과학대학 농생명과학공동기기원;국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;국립환경과학원 토양지하수연구과;서울시립대학교 환경원예학과;
Abstract
Inductively coupled plasma-mass spectrometry (ICP-MS), one of the most commonly used instruments for metal analysis, was used to determine total uranium in soil. The method was named as "Modified ASTM C1345-96". When comparing with ASTM C1345-96, digestion time (2~3 days) was shorten to 7 hours and the treatment in furnace was eliminated. In analyses of 26 field soil samples, there was a significant difference in the average concentration of total uranium between modified ASTM C1345-96 and ASTM C1345-96 (F : 6.22 > Fc : 4.03, significance level : 0.05, n=26). The average concentration of modified ASTM C1345-96 was 1.8 times larger than that of ASTM C1345-96. In addition, modified ASTM C1345-96 was compared with other acid digestion methods for soil including ISO 11466, Modified ISO 11466, US EPA-3051, US EPA-3051A and US EPA-3052 using a certificated reference material (SRM 2711a, NIST) and field soil samples with different level of organic matter content (1.6%, 5.8%, 10.6%). Modified ASTM C1345-96 showed the best accuracy of 93.01% for SRM 2711a. Also, modified ASTM C1345-96 showed the higher extraction rates than other digestion methods by 11~45%.
Keywords: Acid digestion;ICP-MS;Pretreatment;Soil Analysis;Uranium;
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