A highly sensitive analytical method based on stir bar sorptive extraction (SBSE) technique and gas chromatography/tandem mass spectrometry (GC/MS-MS) has been developed, allowing the simultaneous multi-analyte determination of seven UV filters in water samples. The stir bar coated with polydimethylsiloxane (PDMS) was added to 40 mL of water sample at pH 3 and stirred at 1,100 rpm for 120 min. Other SBSE parameters (salt effect and presence of organic solvent) were optimised. The method shows good linearity (coefficients > 0.990) and reproducibility (RSD < 12.9%). The extraction efficiencies were above 84% for all the compounds. The limits of detections (LOD) and limits of quantification (LOQ) were 2.1∼8.6 ng/L and 6.8∼27.5 ng/L, respectively. The developed method offers the ability to detect 8 UV filters at ultra-low concentration levels with only 40 mL of sample volume. Matrix effects in tap water, river water, wastewater treatment plant (WWTP) final effluent water and seawater were investigated and it was shown that the method is suitable for the analysis of trace level of 7 UV filters except of benzophenone (BP). The method developed in the present study has the advantage of being rapid, simple, high-sensitive and both user and environmentally friendly.

Abstract
 1. 서 론
 2. 실험재료 및 방법
  2.1. 표준물질 및 시약
  2.2. 표준물질 용액 조제
  2.3. 전처리 방법 및 TD-GC/MS-MS의 분석조건
 3. 결과 및 고찰
  3.1. SBSE 전처리 조건 최적화
  3.2. SBSE-GC/MS-MS 분석법 테스트
 4. 결 론
 참 고 문 헌

• 서창동(부산광역시 상수도사업본부 수질연구소) | Chang-Dong Seo (Water Quality Institute, Water authority)
• 손희종(부산광역시 상수도사업본부 수질연구소) | Hee-Jong Son (Water Quality Institute, Water authority)
• 정종문(부산광역시 상수도사업본부 수질연구소) | Jong-Moon Jung (Water Quality Institute, Water authority)
• 최진택(부산광역시 상수도사업본부 수질연구소) | Jin-Taek Choi (Water Quality Institute, Water authority)
• 장성호(부산대학교 바이오환경에너지학과) | Seong-Ho Jang (Department of Bioenvironmental Energy, Pusan National University) Corresponding author