The quality standards of solid refuse fuel (SRF) define the values for 12 physico-chemical properties, including moisture, lower heating value, and metal compounds, according to Article 20 of the Enforcement Rules of the Act on Resource Saving and Recycling Promotion. These parameters are evaluated via various SRF Quality Test Methods, but problems related to the heavy metal content have been observed in the microwave acid digestion method. Therefore, these methods and their applicability need improvement. In this study, the appropriate testing conditions were derived by varying the parameters of microwave acid digestion, such as microwave power and pre-treatment time. The pre-treatment of SRF as a function of the microwave power revealed an incomplete decomposition of the sample at 600 W, and the heavy metal content analysis was difficult to perform under 9 mL of nitric acid and 3 mL of hydrochloric acid. The experiments with the reference materials under nitric acid at 600 W lasted 30 minutes, and 1,000 W for 20 or 30 minutes were considered optimal conditions. The results confirmed that a mixture of SRF and an acid would take about 20 minutes to reach 180 oC, requiring at least 30 minutes of pre-treatment. The accuracy was within 30% of the standard deviation, with a precision of 70 ~ 130% of the heavy metal recovery rate. By applying these conditions to SRF, the results for each condition were not significantly different and the heavy metal standards for As, Pb, Cd, and Cr were satisfied.

Abstract
 I. 서 론
 II. 실험재료 및 방법
  1. 고형연료제품
  2. 마이크로파 산 분해법
  3. 중금속 분석
  4. 실험 조건
 III. 결과 및 고찰
  1. 마이크로파 전력에 따른 고형연료제품의 전처리 실험
  2. 표준물질을 이용한 마이크로파 산 분해법 적정 조건도출 및 중금속 함량 분석
  3. 마이크로파 산 분해법을 통한 고형연료제품의 전처리 및 중금속 함량 분석
  4. 마이크로파 산 분해법의 개선사항
 IV. 결 론
 References

• 양원석(국립환경과학원) | Won-Seok Yang (Environmental Resources Research Department, National Institute of Environmental Research)
• 박호연(국립환경과학원) | Ho-Yeun Park (Environmental Resources Research Department, National Institute of Environmental Research)
• 강준구(국립환경과학원) | Jun-Gu Kang (Environmental Resources Research Department, National Institute of Environmental Research)
• 이영진(국립환경과학원) | Young-Jin Lee (Environmental Resources Research Department, National Institute of Environmental Research)
• 이영기(국립환경과학원) | Young-Kee Lee (Environmental Resources Research Department, National Institute of Environmental Research)
• 윤영욱(경남과학기술대학교) | Young-Wook Yoon (Environmental Measuring and Inspection Center, Gyeongnam National University of Science and Technology)
• 전태완(국립환경과학원) | Tae-Wan Jeon (Environmental Resources Research Department, National Institute of Environmental Research) Corresponding author