The aims of this study were to investigate and confirm the occurrence and distribution patterns of blood lipid lower agents (BLLAs) in Nakdong river basin (mainstream and its tributaries). 4 (atorvastatin, lovastatin, mevastatin and simvastatin) out of 5 statins and 2 (clofibric acid and zemfibrozil) out of 3 fibrates were detected in 29 sampling sites and simvastatin (>50%) was predominant compound followed by atorvastatin, lovastatin and clofibric acid. The total concentration levels of BLLAs on April, August and November 2009 in surface water samples ranged from ND∼25.7 ng/L, ND∼18.8 and ND to 38.8 ng/L, respectively. The highest concentration level of BLLAs in the mainstream and tributaries in Nakdong river were Goryeong and Jincheon-cheon, respectively. The sewage treatment plants (STPs) along the river affect the BLLAs levels in river and the BLLAs levels decreased with downstream because of dilution effects.

Abstract
 1. 서 론
 2. 실험재료 및 방법
  2.1. 실험 재료
  2.2. 실험 방법
 3. 결과 및 고찰
  3.1. 낙동강 수계에서의 BLLAs 검출 현황
  3.2. 낙동강 본류 및 지천에서 검출된 BLLAs 구성비율
  3.3. 낙동강 수계에서의 BLLAs 검출 특성
 4. 결 론
 참 고 문 헌

• 손희종(부산광역시 상수도사업본부 수질연구소) | Hee-Jong Son (Water Quality Institute, Busan Water Authority) Corresponding author
• 서창동(부산광역시 상수도사업본부 수질연구소) | Chang-Dong Seo (Water Quality Institute, Busan Water Authority)
• 염훈식(부산광역시 상수도사업본부 수질연구소) | Hoon-Sik Yeom (Water Quality Institute, Busan Water Authority)
• 송미정(부산광역시 상수도사업본부 수질연구소) | Mi-Jung Song (Water Quality Institute, Busan Water Authority)
• 김경아(부산광역시 상수도사업본부 수질연구소) | Kyung-A Kim (Water Quality Institute, Busan Water Authority)